4 cylinder V8 Part II

[LX XLR8R]

Originally posted by 302crew
sounds like your valves arent closeing all the way but you said you did a compression test so that cant be it

302crew you read my mind(ps update your sig )..if the vlaves are too tight it is possible that it casn make compression for a split second then be gone,,are you usung a regular compresion tester or a leakdown style..

302crew says this because a car we did a head swap did what you are saying too a T..the problem was the lifters..no matter what i couldnt shim the roller rockers enuff to get them too work(or now that i think about it it could of been the rollers rockers were way old and could be geting loose)how old are your rockers and what type are they(pedistal rr, stud rr or stock)

what was happening was the car would idle fine but when you wrapped the gas driving it would die down and the plugs were wet in gas..

so my vote goes to its in the valvetrain..too long pushrods,roller rockers too loose internally or bolted on too loose,bad lifters or hey the springs could be shot and are staying open @WOT