BP runs rich

[gottafesty]

First off, I'm not sure if this is the right spot for this post. I know this isn't a Tracer forum but the engine may end up in my Festiva so.....

My brother's Tracer (which I may aquire soon) runs rich. It can flood if the pedal isn't floored when started. It's powerless at low RPM's but seems to run good at high RPM's. In town driving yields 13 mpg and hwy is 30+. I can't remember the year. It is a fuel injected bp with an automatic. He said he checked the compression and it was good. All the plugs are firing. Any ideas?

[sasquatch]

air flow sensor?

[Independent]

Check the fuel pressure regulator.

[Damkid]

i'm curious to see where this goes cause my BP is acting very similar, i've been leaning towards a bad fuel injector, but i'm not sure

[FestYboy]

bad O2 sensor will cause a rich condition, but check for a vac leak at the fuel pressure regulator first.

[Pu241]

bad O2 sensor will cause a rich condition, but check for a vac leak at the fuel pressure regulator first.

Man, as much as I hate to admit it!
I'm with FestYboy on this one!

[FB71]

no way an O2 will cause it to be that rich, especially at startup. That significantly exceeds the PCMs enrichment capabilities. Its a mechanical failure of the fuel system, either leaking/stuck open injectors, or an FPR that is bleeding fuel into the vacuum line.

[Damkid]

FB71 - like i said in my other post, my BP runs very rich as well, once the engine is warmed up and if i shut it off and leave it for say an hour and come back, when i go to start it, it cranks over longer than it should, it reminds me exactly is if there was a leak in the fuel line and the extra cranking is the amount of time needed to build fuel pressure again, and there is no visible fuel leaks

does this sound like a bad fuel injector(s)?

i don't mean to highjack the thread with my questions, just thought it's similar enough to be relavent here

[FB71]

possibly bad injector(s). I would check you FPR first. Remove the vacuum line and turn the key on. See if any fuel comes out of the vacuum nipple on the FPR.

[Damkid]

possibly bad injector(s). I would check you FPR first. Remove the vacuum line and turn the key on. See if any fuel comes out of the vacuum nipple on the FPR.

thanks i'll try that, if no fuel comes that would suggest the FPR is good right?

[jglutz]

Jim....the FPR.....your brilliant.

Question....does the check engine light come on when the engine is started then go out. Wondering if the ECU is in "limp" mode and the CE lamp is burned out and maybe a fault code has been stored but not yet retrieved.

[gottafesty]

I'll definately check the fpr tonight. I'm not sure about the ce light so I'll check on that also.

Thanks all!

[FB71]

ok, if fuel does not come out of the vacuum nipple, that does not mean the fpr is good. It just means it's not leaking fuel directly into the intake. It could still be stuck closed, forcing max fuel pressure, which can be in excess of 80psi.

[FestYboy]

Man, as much as I hate to admit it!
I'm with FestYboy on this one!

holy crap!! Pu241 agrees with me ::faints::

[gottafesty]

No fuel comes out of the fpr vacuum nipple. What's the best way to check if it or an injector's stuck/not working properly?

I forgot to ask him about the ce light. I'll check on that tonight.