Hopefully one of you guys can make a suggestion I havent thought of yet. Here's what it's been doing.
Lately, scince the end of June(though this happened once before on June 4th)the car has been having what seems to be a loss of power in 3rd gear for no apparent reason. Normally I shift the car at around 5200-5400rpm and it drops down to 4600-4700rpm in the next gear. However now when I shift to 3rd(sometimes it does it in second)the rpms drop to 4100rpm and the car just feels like it has no power. Here's the strange part, it does this bad only if I build boost and launch it with like 10psi, if I just floor it and let the car go it's better - not 100% but better. It still loses power but doesnt seem to lose it as soon.
So far I've done a compression check and thats ok, I dont have the tools to do a leakdown so I havent done that but then again I dont think it's an internal engine problem. I've changed the plugs, wires, coilpack, and module with no success. I've swapped out the ECM and it's still there. I opened the dump thinking maybe the muffler was collapsed because thats what it feels like(a clogged cat on a normal car)and it didnt help. All the readings on the directscan seem normal. I cleaned the fuel filters to see if they were clogged but they were clean.
I did a fuel pressure check at WOT and did find something funny, I have the fressure set at 46psi line off(I know seems high but 46-47psi is where we found the 83's to be happy, any less it would foul plugs on warmup)and am running 19-20psi of boost so this should mean the fuel pressure should rise to 65-66psi under WOT right? I tested today and was only seeing 61-62psi. It holds steady and the 02's seem fine but I'm wondering if maybe the pump or regulator are acting up. How much does you guys pressure drop from your static setting when you hook the vac line back up? Mine was dropping like 4psi down to around 42-43psi.
Also the valvesprings have been in the car scince beginning of last year, normally I'll change them before the new season but in an effort to save a few bucks I had my friends test them and he said they were ok. I ordered a new set anyway and they should be here tomorrow so I should have them on the car in a few days.
Well thats alot for now, I hope someone can give me an idea cause having this car not right is keeping me from the track and thats killing me.
Lately, scince the end of June(though this happened once before on June 4th)the car has been having what seems to be a loss of power in 3rd gear for no apparent reason. Normally I shift the car at around 5200-5400rpm and it drops down to 4600-4700rpm in the next gear. However now when I shift to 3rd(sometimes it does it in second)the rpms drop to 4100rpm and the car just feels like it has no power. Here's the strange part, it does this bad only if I build boost and launch it with like 10psi, if I just floor it and let the car go it's better - not 100% but better. It still loses power but doesnt seem to lose it as soon.
So far I've done a compression check and thats ok, I dont have the tools to do a leakdown so I havent done that but then again I dont think it's an internal engine problem. I've changed the plugs, wires, coilpack, and module with no success. I've swapped out the ECM and it's still there. I opened the dump thinking maybe the muffler was collapsed because thats what it feels like(a clogged cat on a normal car)and it didnt help. All the readings on the directscan seem normal. I cleaned the fuel filters to see if they were clogged but they were clean.
I did a fuel pressure check at WOT and did find something funny, I have the fressure set at 46psi line off(I know seems high but 46-47psi is where we found the 83's to be happy, any less it would foul plugs on warmup)and am running 19-20psi of boost so this should mean the fuel pressure should rise to 65-66psi under WOT right? I tested today and was only seeing 61-62psi. It holds steady and the 02's seem fine but I'm wondering if maybe the pump or regulator are acting up. How much does you guys pressure drop from your static setting when you hook the vac line back up? Mine was dropping like 4psi down to around 42-43psi.
Also the valvesprings have been in the car scince beginning of last year, normally I'll change them before the new season but in an effort to save a few bucks I had my friends test them and he said they were ok. I ordered a new set anyway and they should be here tomorrow so I should have them on the car in a few days.
Well thats alot for now, I hope someone can give me an idea cause having this car not right is keeping me from the track and thats killing me.
Your story about gaining MPH is not the first time I've heard/read about this....I dismissed it as too much of the hard stuff.
