Killercoyote

But car has same amount of vacuum when it was once tuned car only has 23,468 miles don't think lower intake leaking think it's fuel pump now

edwin108

A vacuum leak can cause your fuel trims to rise, but it wouldn't cause your fuel pressure to drop 20+ psi on a WOT snap.

Killercoyote

Yes true hate just to throw money at it and don't fix problem also need to pass inspection can't drive car with out here in New York they give you tickets right away

edwin108

What setting is the BAP on? You may be able to turn it up and see if the fuel pressure doesn't drop as much on a WOT snap.

Killercoyote

It's all the way up on 10 that's where jpc left it

He left it on 10 that's where it belongs

This most be the reason why the check engine let keeps coming on with these codes

Thanks for your help and time buddy

edwin108

Not a problem. Let us know how it turns out.

Killercoyote

No problem buddy will let you no going to call the tuner at jpc Monday see what he tills me

moosestang

full throttle in nuetral, no, that's not a good idea. Do you have an aeroforce interceptor gauge so you can see the actual fuel trims?

I'm not a fan of the BAP, too many people have had problems and it's going to shorten your fuel pumps life.

so how does the car run at WOT? I'd still pull the spark plugs and if you have aftermarket COPS, that those off to rule them out.

moosestang

That doesn't sound normal. I think it should stumble some, but not that much. You could possibly simulate WOT by pulling the vacuum line off the fpr and the pressure should go up. Make sure that vacuum line is dry inside. I know on a motorcycle, if their is fuel in that line then the fpr is kaput.

Simon1

It will give the fuel trim problems and the WOT issues too. I've been reading through the posts thinking I would check.

The best thing to do is contact a tuner and send them a data log.