inconsistent boost

icey756 · 10-07-2011, 05:42 AM

I have been noticing that my boost is different according to what gear im in. 1st is about 4 or 5 2nd is 5 to 6 third is 6 and 4th is 7. I have a manual boost controller under the hood. I can really think of anything that would be the problem i guess. I have an aftermarket boost gauge hooked up and i also have the stock one hooked up. Im thinking either a vacuum leak somewhere or it could be where i have the new one hooked up. Idk. I'm open for suggestions and also a picture of how u have ur aftermarket boost gauge hooked up would be superb.

cre · 10-08-2011, 05:39 PM

It's not uncommon, especially as the turbo ages and spins less freely... Also in lower gears you're often not in gear long enough for the exhaust gases of overcome the turbo's inertia.

Still, I'd go through the usual steps of testing for boost leaks (with an actual tester you'd be surprised how easy leaks are to miss), check timing and check for error codes.

icey756 · 10-08-2011, 06:57 PM

Quote:

Originally Posted by cre

Still, I'd go through the usual steps of testing for boost leaks (with an actual tester you'd be surprised how easy leaks are to miss), check timing and check for error codes.

Leaks from where? Like all my vacuum lines and stuff u mean?

10-07-2011, 05:42 AM	#1
icey756 3" Exhaust Join Date: Jun 2011 Location: Wisconsin Posts: 177	inconsistent boost I have been noticing that my boost is different according to what gear im in. 1st is about 4 or 5 2nd is 5 to 6 third is 6 and 4th is 7. I have a manual boost controller under the hood. I can really think of anything that would be the problem i guess. I have an aftermarket boost gauge hooked up and i also have the stock one hooked up. Im thinking either a vacuum leak somewhere or it could be where i have the new one hooked up. Idk. I'm open for suggestions and also a picture of how u have ur aftermarket boost gauge hooked up would be superb. __________________ 1988 7M-GTE Manual Turbo, Godspeed IC, Stock HG Torque to 90FP W/ Arp bolts, Silicon water hose kit, silicon vacuum hoses, Godspeed radiator, 2 12" electric fans.

10-08-2011, 05:39 PM	#2
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	It's not uncommon, especially as the turbo ages and spins less freely... Also in lower gears you're often not in gear long enough for the exhaust gases of overcome the turbo's inertia. Still, I'd go through the usual steps of testing for boost leaks (with an actual tester you'd be surprised how easy leaks are to miss), check timing and check for error codes. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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