Troubleshooting Charts
IMPORTANT PRELIMINARY CHECKS
BEFORE USING THIS SECTION
Before using this section you should have performed the “EFI Diagnostic Circuit Check” and de-
termined that:
1.
The ECM is operating correctly.
2.
There are no diagnostic trouble codes (DTC) stored.
SYMPTOM
Verify the customer complaint, and locate the correct symptom. Check the items indicated under that
symptom.
VISUAL/PHYSICAL CHECK
Several of the symptom procedures call for a careful visual/physical check. The importance of
this step cannot be stressed too strongly. It can lead to correcting a problem without further
checks and can save valuable time. These checks should include:
1.
ECM grounds and sensors for being clean, tight and in their proper locations.
2.
Vacuum hoses for splits, kinks, and proper connections. Check thoroughly for any type of leak
or restriction.
3.
4.
5.
6.
7.
8.
Air leaks at throttle body mounting area and intake manifold sealing surfaces.
Ignition wires for cracking, hardness, proper routing and carbon tracking.
Wiring for proper connections, pinches and cuts.
Moisture in distributor cap, primary or secondary ignition circuit connections.
Salt corrosion on electrical connections and exposed throttle body linkages.
Ensure engine is in good mechanical condition.
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-115
| 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!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you