CA18DET WOT problem.

[sr20detconv]

I had this problem before but rarely.The problem is: press 1/2 pedal to like 3500rpm(I have approx psi at that moment.After that I WOT and when I reach full boost(like 4000rpm at that moment) the engine shut and goes again(4500) shut and goes again(5000) etc.I'm suspecting Coils or the maf.What could be the problem?

[driftin8ez]

Are you running the stock rubber intake tube by any chance?

[ilovecoupes]

im having the same problem

[sr20detconv]

Mods:SR T25Apexi airfiltercatbacktest pipeS14 ssac fmicbov

I was thinking maybe I was hitting the boost cut because of an blown turbo vaccum line. I will hookup my boostgauge tomorow.

[driftin8ez]

Mods: I will hookup my boostgauge tomorow.

Ya that would be a good idea, and your wastegate line is busted. Your lucky you didn't blow your motor. You could be running unlimited boost if your wastegate line is busted.

[ilovecoupes]

sorry im thread jacking, but seems kinda pointless to start a new thread with the same problems as you

i have my wastegate hooked up like this ..

do you guys think i should try and tee the line for the wastegate off the line for the BOV?

And my sparkplugs are pretty black; think that could be a factor? And im using the stock rubber intake, if that means anything.
Modified by ilovecoupes at 1:59 PM 6/10/2007

[sr20detconv]

Found the problem. Blown vaccuum line. Damn that things pull at 14psi.

[RS12Turbo]

I had the same prob.....ended up being the vac cap on the nipple under the throttle body popped off. Was only affected @ wot.........took me several days to find the prob

[boost_boy]

Sounds like the problem is solved. If any of you guys seea need to keep this thread, let me know and I'll re-open it. But as of now, it looks like you guys figured out the issue here, so I'm going to close it for now.

Dee