Mazda MX-6 1998, Руководство по ремонту

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TROUBLESHOOTING [ENGINE CONTROL FS]
STEP INSPECTION
ACTION
6
Install fuel pressure gauge between fuel filter
and fuel distributor.
Start engine and run it at idle.
Measure fuel line pressure at idle.
Is fuel line pressure correct at idle?
Fuel line pressure
210— 260 kPa
{2.1— 2.6 kgf/cm2, 30— 37 psi}
Yes Go to next step.
No Zero o r low:
Check fuel pump circuit.
Check for open fuel pump relief valve.
Check for fuel leak inside pressure regulator.
Check for clogged main fuel line.
High:
Check pressure regulator for high pressure cause.
Check for clogged fuel return line.
7 Does fuel line pressure remain at specification
for 60 seconds when ignition switch is turned
ON?
Fuel line pressure
210— 260 kPa
{2.1— 2.6 kgf/cm2, 30— 37 psi}
Yes Go to next step.
No Check pressure regulator for high pressure cause.
8
Remove and shake PCV valve.
Does PCV valve rattle?
Yes Go to next step.
No Replace PCV valve.
9 Check for fuel saturation inside charcoal
canister.
Is excess amount of liquid fuel present in
canister?
Yes Replace charcoal canister.
No Check fuel tank vent system.
Go to next step.
1 0
Is there a restriction in the exhaust system? Yes Check exhaust system.
No Go to next step.
1 1
Check engine condition while tapping EGR
valve housing. Does engine condition
improve?
Yes Replace EGR valve.
No Go to next step.
1 2
Verify test results. If okay, return to diagnostic index to service any additional symptoms.
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