1993 Nissan Primera Nissan Primera

DION COLLIE

MEMBER
1993 NISSAN PRIMERA
4 CYL
FWD
AUTOMATIC
300,770 MILES

Hi
I have a 93 primera starts normally when cold soon as it gets hot fuel seems to richen has been put on computer and will not allow scan for error codes

Wednesday, March 24th, 2010 AT 12:15 AM

2 Replies

RASMATAZ

MECHANIC
75,992 POSTS

Probable causes of an engine running rich are as follows:

1. Fuel pressure not within specs. Can be cause by restricted fuel return line or defective fuel pressure regulator.
2. Defective Oxygen Sensors.
3. Leaking injectors.
4. Coolant temperature sensor out of calibration.
5. Restricted air intake system.

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Wednesday, March 24th, 2010 AT 1:03 AM

DION COLLIE

MEMBER
2 POSTS

Hi thanks for that
I have managed to dwnload a p10 manual

Have had another look at the problems and
The engine check light is NOT on.
Have done checks the book specifies they seem to check out (egr etc:
engine seems to gradually start hunting and tries to leap forward.
Have also checked air cleaner
vaccume lines for leaks
One thing I have not checked is the 02 sensor
All of the checks have been done manually

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Friday, March 26th, 2010 AT 3:02 AM