CUTS OUT AND MISSES (continued)
CHECK SENSORS AND CONTROLS FOR:
1.
2.
Open or grounds in CKT 417 Throttle Position (TP) sensor signal.
Open or grounds in CKT 416 Throttle Position (TP) sensor 5 volt reference.
CHECK ENGINE MECHANICAL FOR:
1.
2.
Proper cylinder compression.
Bent push rods, worn rocker arms, broken valve springs, worn camshaft lobes. Repair or replace
as necessary.
ADDITIONAL CHECKS:
A miss-fire can be caused by Electromagnetic Interference (EMI) on the reference circuit. EMI can
usually be detected by monitoring engine RPM with a scan tool or a tachometer. A sudden increase
in RPM with little change in actual engine RPM change, indicates EMI is present. If the problem ex-
ists, check routing of secondary wires, check ground circuit.
Index
5C-128 - 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 |
(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