92toypunk

cold engine runs fine, as it warms up it when accelerating sputters, almost as if there is a vacuum leak?? i can feel a power lag while accelerating

DeathCougar

iTrader: (23)

I ran into this problem in my 86. It was cured with a new EGR valve.

abecedarian

does it go away when fully warmed up?

92toypunk

no it gets worse.
egr valve huh? local auto parts store should carry this right?

DeathCougar

iTrader: (23)

depends. some do, some don't. You might be able to find them used, but for me I usually can't find them in good shape used. If you can't find them new at the parts store, try toyotapartsales.com which sells OEM parts at actual discount prices

abecedarian

You may also have 1 or more injectors that have bad spray patterns. When cold, the ECU holds the injectors open longer to create the rich mixture a cold engine needs then shortens the injector pulse as the engine warms up. If (an) injector(s) are bad, as the engine warms and the pulse shortens, it could turn from an acceptible spray when cold to a stream when warm, causing an issue with proper combustion in the engine.
A dribbling cold start injector could also cause similar behavior as could valve adjustments, a failing coolant temp sensor or even a vacuum leak.