'97 Cherokee with 4.0. Started spurterring, missing and "check engine" light came on. Computer said it had a lean fuel mixture. Just had fuel pressure checked and it read 49 lbs. Mechanic said it should read 72 pounds and he is "almost sure" I need to replace the fuel pump. Does this sound reasonable? Any other ideas? I had the oxygen sensor replaced last week.
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Fuel pump
- Thread starter brbailey
- Start date
T180081
NAXJA Forum User
- Location
- Waynesboro, VA
72 pounds seems high to me. But I guess it could spike at that. I don't know. I am working on my own fuel delivery problem myself. I will let you know what the fix is when I find it.
satan
NAXJA Forum User
- Location
- Lakewood, CO USA
Time to see if the Mechanic can spell BBB...
this is from "autozone.com" and matches my memory pretty closely (I was thinking 45):
70+psi may be a test with the return crimped (if you had one)
this is from "autozone.com" and matches my memory pretty closely (I was thinking 45):
70+psi may be a test with the return crimped (if you had one)
Thanks for the information. Could a clogged fuel filter be causing the "check engine" light to come on? Last week I had an oxygen sensor replaced after the "check engine" came on and the computer code indicated a bad sensor. Now the computer says it is a lean fuel mixture.
- Location
- Maurertown,Va.
On your 97 there is NO replaceable fuel filter.It is internal and part of the fuel pump assembly.
Wayne
Wayne
T180081
NAXJA Forum User
- Location
- Waynesboro, VA
The fix of my fuel problem was the bulk-head connector. The big one with all the wires going through it. I just rewired around it for a fix.
