BACKFIRE (EXHAUST)
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” section.
CHECK FUEL SYSTEM FOR:
1.
2.
An abnormal fuel system condition: If necessary perform fuel system diagnosis.
Proper functioning of fuel injectors.
CHECK IGNITION SYSTEM FOR:
1.
2.
3.
4.
5.
Opens and grounds in CKTs 423, 424 and 430.
Properly functioning (advancing and retarding of timing) Ignition Control (IC).
Proper output voltage of ignition coil.
Faulty or corroded spark plug wires and boots.
Faulty spark plugs.
CHECK ENGINE FOR:
Possible sticking or leaking valves.
1.
Index
5C-132 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
90-823224--2 796
| 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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Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
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