Alright my friend just bought a 91 ser sentra with a 60trim t3t4 on it, he was driving in 4th gear and punched it and took it up past 7k and when he left off he heard a loud air sound after his bov discharged it sounded like an air compressor sound, anyways he tried to get on it again and when he went to build boost it wouldnt go past 1or2 psi and the car would sputtered and buck violently, Im out of ideas, i thought it was a vacuum leak but the boost gauge is reading right around -20 vacuum his fuel upgradeds are 550cc inj, 300zx tt fuel pump and a jwt ecu and a fpr, any answers will be apprecitated thanks
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Sentra Turbo Problem Help!!!!!!!!1
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RED_DET
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You need to pressurise the system and check for leaks, specifically in the intercooler piping/couplers. It might idle fine, but when you try to start sending a substanial amout of boost through the piping and there is any type of leak, things just get ugly like they have done. Check to make sure he didn't blow a line of the wastegate as well. What type of wastegate is he running? external or internal? If it's anything to do with the MAF, it will idle like **** as well.
he is running a 38mm tial external wastegate, we checked the lines on it and traced them back to the greddy profec spec 2 solenoid and there all attached, we will check over it tomorrow for leaks, so chances are its a LEAK in the system.
he just had it dyno'd it made 375whp at 18psi thought i would post that.
he just had it dyno'd it made 375whp at 18psi thought i would post that.
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RED_DET
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r34silvia wrote:he is running a 38mm tial external wastegate, we checked the lines on it and traced them back to the greddy profec spec 2 solenoid and there all attached, we will check over it tomorrow for leaks, so chances are its a LEAK in the system.
he just had it dyno'd it made 375whp at 18psi thought i would post that.
I bet money on a leak.
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RED_DET
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You need to get a good size intertube with valve stem attached. Cut the tube, then place the cut end around where the MAF goes, secure it with clamps. Then take a air compressor, put air into the intertube as if you were blowing up a tire. Have your buddy check for leaks as you do this periodically.
Alright we found what was wrong, I looked around the intercooler piping and found a huge hole in....get this his lower pipe was actually a piece of pool hose, and I guess when he got on it, it blew a hole in the plastic hose, we replaced it for now but i told him to get a piece of pipe made up and weld it on, so no more leak and the car runs perfect again, thanks for the ideas guys, later
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