fuel smell under load
#1
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Location: colorado
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Year: 90
Model: Cherokee
Engine: 4.0
fuel smell under load
I've been searching the threads to no avail. I've hade a problem that I can't pinpoint, and I have done all the cheap fixes I can think of. I only smell fuel when I'm driving (while there is a load on the engine) and the window is down, when I stop and idle the engine, open the hood, I can't pinpoint where the leak is coming from and lose the smell. There is no tell tail sign of a leak under the hood. I replaced all the rubber hoses from the firewall back to the gas tank (filler, supply, vent). I also replaced the fuel vapor canister and the line that runs along the fire wall to the air filter. the only thing I haven't done is the fuel rail and the injectors. I have never replaced injectors and price is of consequence. A friend at work said I can replace O-rings on the injectors, is that possible? and what do I look for at the auto parts store? I don't think it is the fuel rail, because there is no wet spots or built up dusty spots where fuel would be leaking. Any insight would be helpfull.
#2
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Year: 1988
Model: Cherokee
Engine: 4.0
You can replace just the o-rings on your injectors like I did but it is very clear if you have a leaky injector because you can see the leaking fuel. The o-ring kit is onlt $12. Not too sure where else the smell might be coming from.
#3
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I've had this as well. On mine, it was the injector to manifold leaking (like a fine spray mist). Look at where each injector goes into the intake you might see some spray. On the rail, the o-rings can be loose or damaged. If you jiggle or turn the injector, see if the idle changes. If it does, you can have a leak there. Had my rail off and on quite a few times to try and find these fuel issues. Good o-rings and injectors make a difference. The brown ones go into the manifold and the black are for the rail. I've never had problems at the regulator or the feed end either.
Good luck.
Good luck.
#4
Herp Derp Jerp
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Year: 1999
Model: Cherokee
Engine: 4.0L OBD-II
Check your exhaust manifold for cracks around the collector near the bottom. Extremely common failure. I thought mine was raw fuel too... Technically it is, since the exhaust hasn't hit the cat yet.
#5
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Year: 1998
Model: Cherokee
Engine: 4.0
Originally Posted by salad
Check your exhaust manifold for cracks around the collector near the bottom. Extremely common failure. I thought mine was raw fuel too... Technically it is, since the exhaust hasn't hit the cat yet.
#6
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Year: 1990 Laredo
Model: Cherokee
Engine: 4.0 Inline 6 Renix
I would also check your exhaust manifold it can have a very similar smell like you said.. But injectors are tend to leak also with higher miles what year is your jeep ?
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