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Overboost Issue R32 Gtr

Noc88
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Noc88 Newbie

Noc88

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So I recently purchased a 92 R32 GTR and had it shipped to me. I was told it was mostly stock besides intake/exhaust. After getting the car I found that's not the case. So onto the problem, when the car makes boost it hold good up to 1 bar but after it goes over that it will cut out. the once or twice iv messed with it the make sure it wasn't a fluke the highest reading I saw was over 1.5 bar. I'm not sure if its cutting out because the fuel cannot keep up with the added requirement or if the boost is cutting out. I has the stock boost solenoid removed and both those lines cap'd off. So am i right to think it should be running off the turbo actuator pressure? When I rcvd the car it was also bone dry on fuel and i had to drive it on E to the local gas station. Maybe a clogged fuel filter?(already ordered a new one) any direction to look before I start ripping the engine apart would be great.

Side notes:

-The actuators look like they have been upgraded to HKS ones but the compressor housing still says garret

-I do know its not safe to run that much boost on stock turbos if they are stock.

Known mods:

HKS Actuators

HKS cam slider gears

Apex intake

Tomei Cat back

Some dumb hyper ground system

Stock boost solenoid delete(not sure about this)

Greddy boost gauge

Edited by Noc88
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GH05T Grand Master

GH05T

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Posted (edited)

step one - stop smashing that level of boost.

your gonna lean it out and kill it fast.

fuel blockage will not cause high boost, plumb the lines back into the actuators/ boost solenoid properly, if you don't know whats going on put it back to stock and get it right. it might just be bleeding to nowhere and free boosting

Edited by GH05T
Noc88 Newbie

Noc88

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  • Author
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step one - stop smashing that level of boost.

your gonna lean it out and kill it fast.

fuel blockage will not cause high boost, plumb the lines back into the actuators/ boost solenoid properly, if you don't know whats going on put it back to stock and get it right. it might just be bleeding to nowhere and free boosting

I'm not retarded I only did it twice. first time testing the car and 2nd time making sure it wasn't a fluke.

I'v already started ripping it apart to go as stock as i can but it did not come with the stock boost solenoid so I'm just replacing vacuum lines and making sure they are properly clamped. Also I plan to test the turbo actuators while i have it apart.

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  • 3 weeks later...
Noc88 Newbie

Noc88

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Well Figured everything out. The over boost issue was improperly routed vacuum lines and after I correct them she started running on waste gate pressure. I have since installed a electronic boost controller also. The cutting out at high Rpm's was the combo of Coil packs and installing a smaller gaped spark plug. Thanks for the advice.

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