Ok, follow up to my fuel pump question

[fly89gta]

Let me first off start by saying that i love the pump and new injectors

but i'm running kinda rich, gas mileage isn't that great

i ahve the bosch 237 regulator(AFPR coming soon)

i'm getting 42-43 PSI at idle line off. At part throttle i'm 105 on the BLMs and my O2's are around 850-875(rich i know)

what could cause this? should i try thowing the 233 regulator in?

any help would be great, but no knock at all unless i punch it when i'm on the highway(i don't have my intercool scoop on yet, sometimes getting like 3* knock then it goes away after a cycle or 2) but no knock going from a dead stop

 

[fly89gta]

heeeeeeeeeeeeeeeeeeeeeeeeeeeeelp

 

[TurboDave]

Well, first of all I see you're running a Thrasher. They like fuel pressure to be 45 line off, which of course would drive your blm's even lower and your WOT O2's even higher

My guess would be to try a different chip, and see what happens. If the injector constant in the chip is only a few points off either way, it can skew your blm's that far and push the O2's that high.

At least your signs are consistent, so I'd try a different chip, without being able to look at your car and look for things that may be "amiss".

 

[fly89gta]

ok, here is what i don't understand, if my 237 regualator is suppose to be 45# why am i getting 43

should i try a AFPR before trying another chip?

 

[DKREDT]

Tony:

I would get an afpr and try to dial it in. I have read that some of the 237's can vary a bit. (wasn't the 237 a 43psi reg?)

This is a mod you need for sure in case you ever do change chips and want to properly dial in the fp.

HTH

Joel