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M:\Product Information\366-348\Instructions\366-348 MGB Fuel Injection Installation Instructions_Grant_2.doc

366-348 Inst Fig 108

366-348 Inst Fig 109

108.1

109.1

366-348 Inst Fig 105

366-348 Inst Fig 106

106.1

366-348 Inst Fig 107

107.1

107.2

107.3

Installation Part 15- Air Intake & Filter

168.

Find the air intake, air filter, and the SAE40 band-

type hose clamp for the air filter provided in the kit.

The

manufacturer has discontinued the orange air filter; the
filter in the kit will be blue or black.

169.

Slide the 2.5” conical air filter and a SAE 40 hose

clamp onto the air intake housing.

Note that the screw

on the clamp is on the side of the housing. It is easier to
get to it when it is in this position.

170.

Find the 28” long piece of 5/8” PCV-rated hose

supplied in the kit.

171.

Slide the hose (106.1) onto the nipple on the air

intake housing opposite the air filter hole. It is a very
tight fit, and we do not need a hose clamp here.

172.

Slide the air filter and air intake housing (107.1)

with the hose attached into position.

The air filter should

not touch the inner fender well.

173.

Route the 5/8” hose (107.2) behind, up and around

the vacuum hose for the brake booster (107.3).

Leave

the loose end be for the time being.

174.

Before going any further, make sure the wires from

the fuel injector on the throttle body (108.1) go through
the slot cut in the air intake housing (109.1).

This is

IMPORTANT: Make absolutely sure that the wires are in
this slot and not crimped between the throttle body and
air intake housing.

Page 27 of 52

Содержание Automobile Parts

Страница 1: ...h the California Air Resources Board CARB certification process and we were issued CARB Executive Order D 453 4 for the 75 79 MGB as a result This kit is designed and engineered specifically for a stock 75 80 MGB in good mechanical condition with all the original smog equipment in place and working Before you lift a wrench do a complete tune up to factory specifications Check the compression adjus...

Страница 2: ... stands 4 Flashlight Small Mirror Workshop Manual Factory or Bentley 215 325 Nice but not absolutely required Stud puller An assortment of nut drivers will help with the hose clamps Before You Begin You will be working with gasoline Store fuel in proper containers and avoid any open flames or other ignition sources Work in a well ventilated area and observe all normal shop procedures As with all p...

Страница 3: ... aside A new 328 485 gasket for the plug is included in the kit which we will use when we re fill the system at the very end 1 1 366 348 Inst Fig 1 1977 80 MGB 7 Under the car Position a pan to catch the coolant Loosen the clamp on the lower radiator hose and pull the hose off the radiator outlet When the coolant has drained replace the hose and tighten the clamp The original radiators fitted to l...

Страница 4: ...head see 4 2 below In other cases the nipple 3 1 may have been capped off or plugged with a piece of hose and a bolt If your MGB has been fitted with a manual choke you may remove the cable assembly from the car 15 Locate the hose 4 1 attached to the water choke outlet 4 3 which is attached to the back of the cylinder head 16 Loosen the hose clamp 4 2 and disconnect the hose If the hose is difficu...

Страница 5: ...66 348 Inst Fig 7 7 2 7 1 366 348 Inst Fig 8 8 2 8 1 21 Locate the EGR valve actuator 7 1 Check the base of the EGR valve for any signs of a leak A leak here will affect how the car runs and will make tuning the car difficult If there is any doubt remove the valve and inspect the gasket If there are signs of a leak you must replace the 293 420 gasket This gasket is not supplied in this kit 22 Disc...

Страница 6: ...2 11 1 27 Once the four nuts are removed grasp the carb and pull it away from the manifold If a sealer was used on the gasket the last time the carb was installed you may have some trouble pulling the carb off the studs 28 Once the carb is loose hold it upright because the float bowl is full of fuel 29 Carefully empty the fuel into an approved container and set the carb aside Your old ZS carb shou...

Страница 7: ...scrape the surface 12 1 clean using a gasket scraper and or single edge razor blades Spraying some brake cleaner on the gasket residue will soften it making it easier to scrape off Although missing in the picture keep a rag stuffed into the hole in the manifold 12 2 to keep debris out Be careful not to gouge the surface If you took your safety goggles off put them back on before to do this step We...

Страница 8: ... be re used to re attach the heat shield in a few minutes If your heat shield is in bad shape it can be replaced with a new one 14 3 Moss 373 945 as we have done here 42 Examine the heat shield bracket 14 2 43 Locate the lip on the right side 15 1 and the lip on the left side 16 1 of the intake opening This lip or flange must be partly removed from both sides in order for the throttle body to sit ...

Страница 9: ...ou can also use a grinder jig saw or a Sawzall instead of a hacksaw 47 Lightly file the edges where both cuts were made to remove any burrs At this point you may want to repaint the bracket Strip the rest of the paint get rid of the rust and then spray it with a good high temp automotive primer Finish coat should be black 48 Reattach the modified bracket to the heat shield using the two original P...

Страница 10: ...in your left hand and use your thumb to push the pin on the end of the cable 18 3 into the hole in the bell crank Some cleanup of the hole or slot may be necessary to get a smooth fit 52 Work the cable through the groove so that the cable can wrap around the bellcrank 53 Once the fit is satisfactory remove the throttle cable leaving it in the car and return to the bench with the throttle body 54 F...

Страница 11: ...k toward the rear of the car Carefully position the throttle body in the engine compartment You will have to hold the two lower bolts in place as you maneuver the assembly into position Fig 20 61 Hold the throttle body up against the heat shield and thread the two lower bolts through the heat shield and into the threaded holes in the manifold starting with the lower front bolt the one on your left...

Страница 12: ...ok up at the back side of the firewall you will see a rectangular rubber grommet 21 1 We are going to modify it so we can get the fuel injection harness into the cockpit 65 Pop out the rectangular grommet 21 1 from the hole in the right side of the firewall 66 Cut a 1 hole in the plug using a hole saw 22 1 Avoid the middle rib Slice the grommet from the hole to the bottom edge of the grommet using...

Страница 13: ...se of fender covers or towels to protect the paint 71 Locate the branch of the harness with the molded plastic connectors and carefully route it over toward the throttle body Take your time and run the harness under the heater hoses behind vacuum lines and the stock wiring harness bundle 72 There will be a bundle of red white wire hanging down near the back of the engine see Fig 25C This will prov...

Страница 14: ... 26 1 26 2 26 2 18 1 26 3 366 348 Inst Fig 26B 366 348 Inst Fig 26C 74 Locate the connector on the harness for the Fuel Injector and plug it in 26 2 75 Locate the connector on the harness for the Throttle Position Sensor TPS and plug it in 26 3 76 Each connector has clips that lock the connector in place make sure these are engaged after you plug in the connector All three connectors are unique an...

Страница 15: ...sor It is a small black plastic box 27 3 with a nipple for a vacuum hose 27 4 and a socket for a wiring connector 27 5 366 348 Inst Fig 27C 27 3 27 5 27 4 27 7 27 6 78 Connect the harness plug 27 6 and position the MAP sensor so there is slack in the wires It fits nicely on the firewall shelf near where the throttle cable guide is mounted 27 7 79 There are two slots for screws at either end of the...

Страница 16: ...installed after we fit the engine coolant temperature sensor ECT 366 348 Inst Fig 33 366 348 Inst Fig 34 366 348 Inst Fig 35 366 348 Inst Fig 36 88 Remove the two studs 32 1 from the head It will be necessary to double nut the studs or use a pair of vice grips to break them loose Fig 33 34 Discard them they will be replaced with longer studs supplied in the kit If the studs are very hard to move t...

Страница 17: ... 40 supplied in the kit and the aluminum adaptor block it threads into Fig 41 There should already be Teflon tape around the threads of the ECT 40 1 If you ever replace this sensor wrap Teflon tape around the threads before installation 99 Thread the ECT sensor into the ECT adapter block Fig 42 Just get it started We will tighten it after it is installed on the head 100 Slide the ECT adapter block...

Страница 18: ...ide a small hose clamp supplied in kit over the end of the hose and push the hose onto the water choke outlet and tighten the hose clamp 106 Route the 3 8 hose 49 1 from the water choke outlet over the top of the throttle body 49 2 and down towards the nipple in the coolant hard line 49 3 Remove the cap or plug on the nipple if present 366 348 Inst Fig 49 366 348 Inst Fig 50 49 3 49 2 366 348 Inst...

Страница 19: ...achometer wire 61 2 366 348 Inst Fig 61 1979 California MGB 111 Find the T Taps supplied in the kit Fig 62 One the cars with a regular coil you could put a 8 ring connector on the white wire and secure it to the negative terminal on the coil On the cars with the electronic ignition coil the wires disappear into the coil and you cannot do that which is why we supply a t tap in the kit 366 348 Inst ...

Страница 20: ... the end and crimp a male spade connector onto the wire 65 7 366 348 Inst Fig 66 1979 California MGB 66 1 66 2 118 Connect the male spade connector 66 1 on the fuel injection harness white wire to the t tap 66 2 that is crimped onto one of the white w black tracer wires leading to the negative side of the ignition coil The white wire feeds the ECU the same signal the tachometer sees the white wire...

Страница 21: ...k connector supplied in the kit Fig 70 Moss 772 271 366 348 Inst Fig 71 71 1 71 2 366 348 Inst Fig 72 72 1 125 Slide the piggyback connector onto the male spade you have just exposed 69 2 above Note that the longer of the two spades 71 1 points straight forward and the shorter spade 71 2 is angled toward the engine compartment a little 126 Re connect the factory female spade connector removed earl...

Страница 22: ...er to label this fuse holder 5 By marking the fuse holder we can tell the black wires apart even if the fuses are removed 133 Connect the female spade connector 76 2 to the open male spade on the fuse block see 74 1 above Again if necessary the piggyback procedure we just went through see above will have to be repeated 366 348 Inst Fig 77 77 1 77 2 134 Find the group of wires in the fuel injection...

Страница 23: ... 82 3 of the bellcrank arm We removed the throttle body to take the picture you will attach the cable with the throttle body mounted which is why we test fit the cable earlier 141 Once the cable 83 1 is attached to the bellcrank 83 2 we need to get the adjustable end of the cable 83 3 into the bracket on the throttle body 83 4 This requires a little explanation using a picture of what it will look...

Страница 24: ...ectly you will have problems later This completes part 11 of the installation Installation Part 12 Installing the Fuel Filter Hose 145 Locate the fuel filter 3 piece of fuel hose 32 piece of 5 16 fuel hose and appropriate hose clamps supplied in the kit 366 348 Inst Fig 90 90 3 90 2 90 1 90 4 146 Loosen the screw in the fuel filter clamp 90 1 147 Loosen the hose clamp securing the hose to the bott...

Страница 25: ...d in the kit There is a 30 piece as well make sure you get the right one 157 Connect the hose to the distributor vacuum advance 95 1 158 Run the hose 95 2 under the AIR injection rail 95 3 around the back of the cylinder head 95 4 366 348 Inst Fig 96 96 2 96 1 96 3 96 4 159 Connect the hose 96 1 DIRECTLY to the lower right nipple on the bottom of the throttle body 96 2 bypassing the transmission c...

Страница 26: ...98 4 166 Arrange the hose so it runs past the throttle body along the inner fender well 99 1 In this example the hose follows the Fuel hose 99 2 Note the orientation of the loop it hangs down in relation to both ends of the hose The catalytic converter is on this side of the engine Use zip ties to secure the hoses as far away from the exhaust system as possible 167 Connect the hose from the MAP se...

Страница 27: ...asier to get to it when it is in this position 170 Find the 28 long piece of 5 8 PCV rated hose supplied in the kit 171 Slide the hose 106 1 onto the nipple on the air intake housing opposite the air filter hole It is a very tight fit and we do not need a hose clamp here 172 Slide the air filter and air intake housing 107 1 with the hose attached into position The air filter should not touch the i...

Страница 28: ...he holes one at a time 366 348 Inst Fig 111 177 Once you have verified that all will start remove them and put a little Loctite on the threads of each bolt 178 Start with the lower rear bolt 110 1 Get this bolt started then start the other two 110 2 100 3 Tighten the screws with a 5mm Allen wrench Fig 111 DO NOT over tighten or the intake housing will crack 366 348 Inst Fig 112 112 3 112 2 112 4 1...

Страница 29: ...is is a high pressure fuel hose take your time and make sure that it will not be rubbing against any sharp corners or rough edges This completes part 16 of the installation Installation Part 16 5 Fuel Pump Inertia Switch A working inertia switch will cut power to the fuel pump in the event of a collision Even though the ECU will turn off the fuel pump 3 seconds after the engine stops running we st...

Страница 30: ...piece of electrical tape around the exposed metal shank of the male spade connectors 197 Pull both black plastic connectors off the terminals on the inertia switch Connect the two white wires to the single white wire with the jumper wire you just made The white wires provide power to the overdrive electrics in addition to the original fuel pump The fuel pump wire in the trunk has been taped off an...

Страница 31: ...ws We will need one later to plug one of the threaded holes 203 Disconnect and wrap the electrical power connector for the original fuel pump 182 2 with black electrical tape so it cannot short out then zip tie it out of the way It will not be used 204 Loosen the clamp 128 3 around the large rubber donut or grommet 128 4 that holds the pump in place 205 Now from underneath the car remove the groun...

Страница 32: ...e car 213 Run the fuel return hose that is connected to the OUT nipple at the throttle body and the red wire with white stripe along the bottom of the car and back towards the axle battery box area zip tying them to the existing fuel hard line and brake lines Fig 132 214 When you get to the crossmembers run the hose and the wire over the crossmember rather than under Fig 133 Remember not to pinch ...

Страница 33: ... From inside the trunk pull in any remaining slack if necessary This is as much as we can do with this hose at this time This completes part 18 of the installation Installation Part 19 Connecting the High Pressure Fuel Pump 220 Find the following 366 348 Inst Fig 165 165 1 165 2 one high pressure pump four small hose clamps a 36 inch length of 5 16 fuel hose a 24 inch length of 5 16 fuel hose All ...

Страница 34: ... rest of our connections 228 Slide a small hose clamp over each end of the 36 length of 5 16 fuel hose 366 348 Inst Fig 170 77 80 MGB 170 1 229 Locate the fuel sending unit on the right side of the fuel tank Remove the old hose from the fitting on the tank 170 1 Slide one end of the 36 piece of fuel hose onto the fitting on the gas tank Tighten the clamp On the 74 5 76 MGBs there is a rigid steel ...

Страница 35: ... of the wire Crimp the ring terminal to one end and the 8 ring terminal to the other 236 Secure the end of the black wire with the 8 ring terminal to the negative terminal on the fuel pump which is labeled 176 3 237 Run the black wire up and over the axle to the battery box on the passenger s side 177 1 Locate the stud welded to the side of the battery box 177 2 Remove the Nyloc nut from the stud ...

Страница 36: ...he space behind the rear axle 180 2 and the up against the forward bulkhead of the trunk 180 1 The hose to the fuel tank 180 3 points toward the driver s side The hose to the throttle body 180 4 points to the passenger s side Note the nut welded to the bulkhead 180 5 and the large hole 180 6 for the original SU pump 366 348 Inst Fig 180 180 1 180 2 180 5 180 3 180 4 180 5 180 6 240 Wrap foam sleev...

Страница 37: ...the path of the axle 186 2 Retighten the p clamp If necessary remove the mounting bolt and P clamp and rotate the pump until the hoses are out of the way and then reinstall the pump 247 To finish the installation of the pump route the hoses so they are not under tension and there are no kinks or sharp bends Zip tie the hoses together or to other hard points in the area to secure them 187 1 248 The...

Страница 38: ...ction of hose where it comes up from the floor of the trunk 190 2 192 2 If the straight section is over 3 you have an early hose If it is less than 3 you have the late hose and you will need to find the 2 1 2 long piece of 2 ID filler hose supplied in the kit Loosen the hose clamps on the fuel filler hose and remove the hose 250 Early hose mark the hose 2 1 2 up from the end that connects to the t...

Страница 39: ...eturn hose we ran into the trunk earlier Slide a small hose clamp over the end of the hose 203 1 Locate the fuel return nipple on the outside of the fuel return adapter 203 2 263 Push the end of the fuel return hose over the nipple and secure the hose using the small hose clamp 204 1 Installation Part 21 2 Fuel Filler Neck Late Hose after early 1978 366 348 Inst Fig 208 366 348 Inst Fig 210 208 1 ...

Страница 40: ...d set it to one side in the engine compartment leaving the washer fluid tube attached 221 1 366 348 Inst Fig 221 221 1 366 348 Inst Fig 222 222 1 269 Lift the washer bottle 222 1 out of the sheetmetal bracket and set is aside 270 Using a 7 16 socket remove the two bolts 224 1 that secure the washer bottle bracket 271 Remove the two Phillips head screws under the washer bottle bracket s front edge ...

Страница 41: ...l meet 232 3 These two edges will help locate the paper template we will use to locate and drill the holes used to mount the ECU 366 348 Inst Fig 232 232 1 232 2 366 348 Inst Fig 233 233 2 233 1 278 Hold the paper template supplied in the kit up against the sheetmetal with the left hand edge of the paper 233 1 following the bend in the sheetmetal 232 1 Move the top edge of the paper 233 2 over aga...

Страница 42: ...e passenger seat Fig 236 284 Find the 8 x 1 self tapping screws supplied in the kit and slip one through the left rear hole in the mounting flange 236 1 Remember rear is toward the back of the car 285 Slip a plastic spacer over the screw Fig 237 286 Take a small piece of masking tape and stretch it over the screw to hold the screw and spacer in place on the ECU while you install it Fig 238 239 287...

Страница 43: ...rom the firewall and modified by adding a 1 hole Fig 242 292 Work the fuel injection harness through the slot in the plug and into the hole The harness with its black plastic sleeve will fill up the 1 hole we made in the plug 366 348 Inst Fig 242 242 1 366 348 Inst Fig 243 293 Reinstall the factory rubber firewall plug Fig 243 It will take some time to work the plug into place Press lightly just i...

Страница 44: ...re secure Fig 245 298 Look under the car every fuel supply hose and fuel return hose connection for leaks 299 Turn the ignition switch off If the fuel pump worked and all the connections are tight we will take care of a few loose ends 366 348 Inst Fig 246 246 1 246 2 300 Locate the 2 5 diameter plastic plug supplied in the kit Insert it into the hole in the trunk 246 1 You will need to push just i...

Страница 45: ... we drained from the system back into the expansion tank 248 2 until the tank is about full 366 348 Inst Fig 247 247 1 366 348 Inst Fig 247B 247 2 307 Pour more of the 50 50 mixture of anti freeze and water into the open thermostat housing 247 1 until the fluid reaches the bottom thread of the opening You will have some of the anti freeze mixture left over We will use more of the mixture when we t...

Страница 46: ...nd you can burn yourself 313 After running for about 30 seconds shut the engine off 314 Top off the coolant system as follows 315 Loosen the filler cap on the expansion tank to release the pressure if any and fill it up about half way with more of the 50 50 anti freeze mixture Replace the pressure cap 316 Remove the plug and gasket from the thermostat housing and pour more of the 50 50 mixture of ...

Страница 47: ...etting the spark plug gap and timing given in the factory or Robert Bentley workshop manual Use standard resistor type plug wires Stay away from solid core plug wires The RF will affect the ECU and your car will not run correctly COOLING SYSTEM Keep the coolant system topped off The late MGB runs hotter to help it meet emission standards and running the car low on coolant will create all sorts of ...

Страница 48: ...orking 3 1 Engine flooded 3 1 1 If you have a strong smell of gasoline near the air intake or throttle body hold the throttle to the floor and start the engine The throttle position sensor will recognize full throttle at start up and the ECU will temporarily stop injecting fuel The excess fuel should be pulled through the engine and the car should start 3 2 Engine is Not Flooded 3 2 1 Check the ha...

Страница 49: ...HROTTLE STOP MGB FI 772 229 1 EACH THROTTLE CABLE BRACKET MGB FI 772 052 4 EACH BOLT FLATHEAD SOCKT M6X1 0X16 Upper to Lower TB bolts 052 801 2 EACH CAP SCREW BUTTON HD M4X 7X16MM 052 802 2 EACH CAP SCREW BUTTON HD M4X 7X12MM 052 803 1 EACH BELLCRANK ARM THROTTLE CABLE 772 269 1 EACH LOCK WASHER 1 4 ZINC 052 805 1 EACH WASHER M6X1 6X18OD ZINC 052 806 1 EACH NUT HEX M6 X 1 0 X 6 ZINC 052 807 1 EACH...

Страница 50: ...kg so tube won t get bent 326 280 2 EACH CLAMP 1 13 16 2 13 16 2 1 8 Fuel filler neck 051 474 14 FOOT HOSE FUEL 5 16 BULK Fuel return TB to tank 051 474 3 FOOT HOSE FUEL 5 16 BULK Fuel tank to fuel pump 051 474 2 FOOT HOSE FUEL 5 16 BULK Fuel pump to hard line 377 310 1 EACH FILTER FUEL FOR 5 16 IN HOSE Verify 3 hose included in box 051 474 2 67 FOOT HOSE FUEL 5 16 BULK SHOULD BE 32IN EXACTLY Fuel...

Страница 51: ...GA 5 AMP Inline Fuse 12VSwitch 15 AMP Inline Fuse 12VConst 772 271 2 EACH SPADE PIGGYBACK 1FEM TO 2 MALE 052 177 1 EACH HOSE VACUUM 5 32 X 40IN 051 825 1 EACH HOSE VACUUM 5 32 X 30 IN 771 335 1 EACH LOCTITE BLUE INDIVIDUAL USE 326 260 1 EACH CLAMP HOSE BAND TYPE Cranckcase evap to AF hose 772 266 1 EACH CAPLUGS 2 5 HOLE PLUG 772 055 1 EACH INSTRUCTIONS FUEL INJECTION 328 485 1 EACH GASKET OUTLET P...

Страница 52: ... the accuracy of the hole locations Lay the ECU on top of the template and make sure the hole locations in the mounting flange have not been changed Cut or fold the paper along the dotted line then align this edge of the paper with the bend in the sheet metal under the dash This edge is closest to the seat The end of the ECU with the large rectangular connectors faces seat Towards the firewall Mar...

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