Hello my name is Derek and I bought a 93 z28 a few month ago. As far as engine mods go it has a Vortech t-trim running about 6 psi . the whole fuel sytem has been updated 42lb injectors 255 in tank pump and so on. For the longest time I had an oil leak that was pretty bad, I found that it was the rtv behind the intake. Before I found this I did a compression test to check my rings it was fine. In the process I broke my tps but didn't know at the time well it took forever to figure it out but I fixed and it ran a lot better. now its acting up again. it has to turn over about 6 times before it starts and then u have to hold it at like 2 grand so it will run. I'm completely stumped now and don't know what to do. I hope its something simple. i am goin to take it to put it on an obd1 machine next week. anyways If anyone has any ideas on what my problem could be. Now on the other hand in your opinion what should my next mods be. I'm looking for about 600 hp so I know i need to do internals I'd like to push about 10-15 lps boost and I plan to do the whole valvetrain and heads wha would you guy suggest in parts and what not that I should buy.
thanks
-Derek

 

does it only do it when cold, does it get better once it warms up