BACKFIRE (INTAKE)
Definition: Fuel ignites in the manifold, making a loud popping noise.
PRELIMINARY CHECKS
Perform the important preliminary checks as described at the start of “Troubleshooting Charts”
section.
CHECK FUEL SYSTEM FOR:
1.
2.
An abnormal fuel system condition: If necessary perform fuel system diagnosis.
Properly functioning fuel injectors.
CHECK IGNITION SYSTEM FOR:
1.
2.
3.
Opens and grounds in CKTs 423, 424 and 430.
Proper output voltage of ignition coil.
Cross-fire between spark plugs, (distributor cap, spark plug wires and proper routing of plug
wires).
4.
5.
6.
Faulty or corroded spark plug wires and boots.
Faulty spark plugs.
Power reduction mode activated. (1996 Models and Older)
CHECK ENGINE FOR:
1.
2.
Sticking or leaking valves.
Proper valve timing, broken or worn valve train parts.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-131
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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