ROUGH, UNSTABLE, OR INCORRECT IDLE, STALLING
Definition: Engine runs unevenly or rough at idle, also the idle may vary in RPM (called hunt-
ing). Either condition may be severe enough to cause stalling. Engine idles at incorrect
speed.
PRELIMINARY CHECKS
Perform the important preliminary checks as described at the start of“Troubleshooting Charts”
section.
CHECK FUEL SYSTEM FOR:
1.
2.
Open in CKTs 467 or 468.
Fuel injector(s) leaking.
CHECK IGNITION SYSTEM FOR:
1.
2.
3.
4.
Correct ignition timing
Possible opens in the following circuits, CKTs 424,430 and 423.
Possible short to ground in the following circuits, CKTs 430, 424, and 423.
Faulty spark plugs, wires, etc.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-129
| 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 |
(4 votes, average: 4.5 out of 5)
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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