OK first I guess some info on my car. Non-sequential twins, stock ports as far as I know, Supra pump with stock injectors, PowerFC, and all the basic bolt-ons i.e. I/DP/MP/EX/FMIC etc. Its been my DD for 4 years and doesnt ever give me many problems.

Sunday I was driving on the highway here in the BX and decided to have some fun. Car ran perfect, boosted 12psi as usual, and I shut it down in 4th in between 130mph and 140mph. About 5 minutes later the car began to idle rough and lower than usual (1000rpm vs 1200rpm). Vacuum was also low at 13in on my boost gauge instead of the usual 17in. Car died on me and refused to start again until I push started it. From there I drove throughout the whole city for another few hours but the car was still idling weird. The car shakes slightly but the idle is pretty rock solid at 1000rpm. The car also runs perfectly when driving it, as fast as it always is and smooth all the way up to redline. Next day I changed the plugs and the symptoms continued so I decided to not drive the car anymore until I do a compression check.

Did the compression check on the car yesterday and it came up 90psi all around on both rotors.

My turbos were smoking and blown I know so I'm wondering if maybe they just completely took a **** on me after that run since the car is smoking worse. Would completely blown turbos cause these symptoms or should I be looking into the coils or spark plug wires? Maybe something else?

Thanks everyone in advance for any advice.

 

Check the hose to your map sensor.

What does the commander say for the boost reading when the car is idling?

 

It could be coil the extra smoke might be unburnt fuel
Just a thaught
Test coils if possible


I made my own tester just need an osciliscope and coil and ignition amp and a triggrr

http://m.youtube.com/index?desktop_u...Wk&view=videos

 

90 psi all around? Damn- i would stop boosting before (knock on wood) it blows and u damage rotors and housings. go back to 8psi and just drive it easy like a normal car man.

 

I checked the map sensor house before and it's fine. I'll go outside in a little while (after the Giants game) and check what the PFC says.

Jason, I thought 90psi was alittle low but the motor has 84,000 miles so it seemed fine too me.

 

Ifaik, you do want to stay on the high side of 100?

 

Def check fuel pressure and make sure you have constant spark. Even a loose plug wire will cause weird idling and driving habits.

 

One of my plug wires is loose on a leading plug. I was planning on replacing it in the next few days. My biggest concern is the fact that the vacuum is low. Not sure if a loose plug wire would cause that.

 

Yeah man that's low, once it drops down to 80s its a ticking time bomb, my old FC was @ 86psi when it went..

Pull ur intake man, go over all the nipples and hoses..

 

Do u no if u got a paper gaskit on intake ?