Killercoyote

I steped on it and fuel pressure looks like it's dropping below 50

edwin108

How much lower? Does the engine sound like its struggling/stumbling?

Killercoyote

I just did what you told me I held gas steady to 2000 rpm then stepped on it wot and fuel pressure drop below 30 and wide band gauge went to lean side 14.0 and better on the red side

edwin108

I'm not sure what the specs are, but that does seem a bit low.

Killercoyote

Yes I think so too it's boosted so I think it's to low don't remember what it was so I don't no

edwin108

It looks like your fuel pump is getting weak.

Killercoyote

This can cause all these problems

I remember when jpc first tuned it air fuel on idle on wide band showed me 13.6 to 14.2 now on idle it's showing 14.8 to 15.2

Fuel pressure was always 55 on idle now it's showing 52 to 53

edwin108

It makes sense. As your fuel pump gets weak, less fuel goes to the engine. This makes the O2 sensors read lean, causing your fuel trims to go way positive (in an attempt to correct the lean condition).

Killercoyote

Ok on idle it sounds like its has a little low burp in the mufflers

What do you suggest I do

What would you do if it was your car

Someone told me it's intake vacuum leak it does this also and causes fuel trims to rise also

edwin108

I'm fairly certain you need a fuel pump. I would wait for other members to chime in before making a decision/purchase though.