Help with Diagnosis please!

[ruf_round_edges]

Hello all, can anyone here point me in the right direction here to solve my issue? Details on the car are in my profile. Once the car is warmed up and I drive it for a bit, it starts to shudder around 3500 RPMs. There is a noticible power loss and the RPMs don't climb nearly as fast. The boost gauge still reads normally though, as does oil pressure. Any thoughts?

 

[TwoLiterLaser]

Keep it simple. Have you replaced your plugs and wires? I know you said it only happens once it warms up, but plugs and wires are cheap and easy.

What boost are you running? Have you checked for boost leaks? What injectors are you using?

 

[ruf_round_edges]

Keep it simple. Have you replaced your plugs and wires? I know you said it only happens once it warms up, but plugs and wires are cheap and easy.

What boost are you running? Have you checked for boost leaks? What injectors are you using?

We pulled the plugs and cleaned them off but we will try replacing them now. It's only running between 10-12 psi right now, running 450cc injectors.

 

[wcpierson]

Keep it simple. Have you replaced your plugs and wires? I know you said it only happens once it warms up, but plugs and wires are cheap and easy.

What boost are you running? Have you checked for boost leaks? What injectors are you using?

I 2nd that idea...make sure you are using the ngk bpr6es.....and check the gaps on them as they are not pre-gapped...ngk wires are your best friend. Get in the habbit of changing your plugs every oil change....they are a copper core and dont last as long...very cheap thing to keep up maintenence wise

 

[TwoLiterLaser]

Do not forget the wires. Often-times they look just fine but are really not in good working condition.

 

[DSMTSI44]

sounds like a problem i had with my 91 talon. it turned out to be the MAF.