FUEL INJECTION SYSTEM TROUBLESHOOTING
SERVICE MANUAL NUMBER 23
Page 5D-12
90-861326--1 MARCH 1999
Surges and/or Chuggles Symptom (Continued)
9
1. Check integrity of the primary and
secondary wiring.
2. Check routing of the wiring.
3. Check condition of IC module,
pick-up coil, distributor cap, rotor
and spark plug wires.
4. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 10
10
1. Remove spark plugs and check for
wet plugs. cracks, wear, improper
gap, burned electrodes or heavy
deposits.
•
Refer to Distributor Ignition System
in “Description and System Opera-
tion” section.
NOTE: If park plugs are gas or oil fouled,
the cause of the fouling must be deter-
mined before replacing the spark plugs.
2. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 11
11
1. Check fuel delivery system items
that can cause the engine to run rich.
2. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 12
12
1. Check fuel delivery system items
that can cause the engine to run
lean.
2. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 13
13
1. Check the injector connections for
proper mating.
2. If any of the injectors connectors are
connected to an incorrect cylinder,
correct as necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 14
14
1. Check ECM grounds for being
clean, tight and in the proper
locations.
2. If a problem is found, repair as
necessary.
Was a problem found?
-
Go to OBD
System
Check
Go to Step 15
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