PROBLEM!

[sil80ryan]

Hi im new here im Ryan my problem is that when i hit about 4500 rpm's my car will studder in every gear except 1st and cold starts are ****ty 2 it takes a long time to start do u know whats worng?thx

[ca18det240hatch]

start with the usual, coolant temperature sensor, boost leaks, vacuum leaks, check your plugs, and check your timing.

[sil80ryan]

there are no boost leaks just put new plugs in coolant temperature sensor are brand new and there are no vaccume leaks

ill tryt the timing thx

[Liquid_Neon]

check the computer for codes... and whens the last time it had a tune up?

[Zero260]

what about a defunked Idle air control, or what the manual calls an A.A.C. valve, that could give you a cold start problem.

EDIT: or an o2 sensor?