94 Camaro Z28, major fuel prb., please help.....

[Rabbidgoat 94Z28]

Well lets start by saying thank you for taking the time to read this, maybe kinda long (don't want to leave anything out). I have a 94 Z28.. Problem--dumping fuel in the oil (i mean a lot!) Now history---ran hot, wouldn't hold water...pulled engine for rebuild. Now, its already out so why not go ahead and do a little bit extra right?.....bored .030 over, new pistons--- same rods and crank...<note: all GM Performance Parts> cam-525/525 intake and 218/228 exhaust.... 1.6 roller rockers... high energy valve springs..... heads milled just enough to make them straight again and valve job....computer reprogrammed by MTI in Houston TX....new distributor....heavy duty timing chain set....edelbrock headersand.... of course (the culprit) new water pump. Now current. Back together and in car, dumping fuel in oil, won't rev over 800 to 900 rpm with the pedal on the floor. Its like the fuel is not even going to the cylinders. It will "idle" on its own, but barely. I know with the cam it will be a rough idle, but i don't think it should be as rough as it is. It sounds like its out of time, but its not. I am pretty sure the injectors are ok, not really big enough, but they should do enough for it to run. Pulled the intake back off and had it rechecked, fluxed and all, its fine. The car has been to 3 local speed shops and no one knows what is wrong with it. The local dealership won't touch it because it has been modified. I don't have a lot of money and I really want the car going again, some have said the fuel pump, but really I'm not sure where to begin. Any help that anyone could give would be greatly appreciated. Again, thank you for taking the time to read this, sorry it's so long. Thanks

[Genopsyde]

ouch, i'll leave this one for 89iroc&rs

[89IROC&RS]

ok first off its not the fuel pump unless you put a mechanical one on the block, the fuel pump is in your gas tank. the only point that the fuel enters anywhere near the engine would be the injectors into the ports. im a bit confused as how the waterpump caused this originally, i dont see how it would, water yes, fuel no, fuel has nothing to do with the water pump. now you said you just had it bored .030 over, this is kinda a dumb question, but you did put in .030 oversized pistons, and the correct .030 over rings right????? dont mean to make any suggestions at lack of knowledge, but ive seen it done before. what is also probible is a simple mistake, that is done quite often. is incorrectly honing the cylender bores. im not sure exactly what the specs are, but there are two different types of rings, and two different levels of honing, and if you mismatch them, the walls are too slick for the rings to properly set, and you have extream blowby, so thats a possiblity. there is also the possiblity of fuel reversion, if the cam is out of sync, off a few tooths or something, it can cause a harmonic that blows the fuel up out of the cylenders back into the intake, possibly into the throttle body, there is a connection from the trottle body to the PCV breather, but this i think is highly unlikely, because the reversion would have to be VERY bad. hmmmm, also could have a bad mating surface, or something from the intake to the lifter vally, thus putting fuel in the oil. these are all random guesses, but its the only things i can think of that might cause your condition. thats a tricky one.

[Rabbidgoat 94Z28]

I guess i left part out, the water pump went and ummm it got a little bit to warm. It warped the heads up just a little but i had the machine shop fix that. They said it wasn't bad. As far as the fuel pump, i was told that it could be going bad and not have enough pressure or too much.

[Rabbidgoat 94Z28]

The overheating is the reason I pulled the motor in the first place. And I figured since it was already out, why go back stock. Oh yeah, (sorry) there was once before it ever ran hot tha I checked my oil and could smell fuel, not bad, but you could smell it and it was raw fuel. I immediatly changed the oil and filter and kept a check on it, but it never happened again until after the rebuild.

[89IROC&RS]

ah HA!!! a clue sherlock guess what else is aluminum, and would warp with your heads. the intake. although i though you said you had that checked, so maybe its fine after all, but regardless, you probly need new heads. they probly were warped worse than they thought, and they didnt get them flat enough and they are still leaking compression and fuel.

[Rabbidgoat 94Z28]

would a simple compression check tell if it was the heads. Yes, at first i thought intake, so i pulled it back off (after the rebuild) and had it rechecked and it is fine. As far as the heads go, the machine shop said that they didn't have to take much off of them and that they were "trued back up" and would be just fine. I love the car and just want it running again. Note: if it was a Ford, i would just burn it. lol.

[89IROC&RS]

compression test is a very good idea, i think its gonna show you your problem, very low compression. either from warped heads, or shot rings.