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I just bought my car yesterday. It's a 90 TII with 30k on the motor and 24k on the rest. Basically, as I explained in an earlier post, my car seems to hold vacuum well, but when it comes time to boost, the turbo spools but it doesn't feel like it's boosting and the gauge then dials out to 0-100mmHg. What should I do first to try to fix this? Again, I can hear the turbo spool a little... it's not grinding. I can also hear it hiss. This makes me believe it's a vacuum leak... so my first choice would be silicone hoses... BUT, i don't know enough about the situation yet. (No aftermarket boost gauge.) Oh, and the car has new full exhaust and high flow cats. Could it be the wastegate? Hoses? What should I do first?
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yea .... get an aftermarket gauge....see whats actually going on
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Boost leak?
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no boost leak
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Originally Posted by JackoliciousLegs' date='Aug 7 2003, 12:31 PM
no boost leak
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that is what i heard also so the FCD and fuel mods are supose to be used. along with an aftermarket boost gauge... heres a good question... how many of you are actualy running Turbo Timers
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Originally Posted by MazdaEnthused' date='Aug 7 2003, 01:09 PM
that is what i heard also so the FCD and fuel mods are supose to be used. along with an aftermarket boost gauge... heres a good question... how many of you are actualy running Turbo Timers
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check the acctuator rod on the turbo, this is a common overlooked problem. The turbo will spool up, but the wastegate flap is hanging wide open bypassing all the gasses causing a no boost condition. Is there a heavy black smoke exiting the rear in the area you should be boosting in the RPMs? Have you pulled off the air filter inlet tube to the turbo and checked if the turbo is free spinning? Although I have not heard of it yet on a 13b, but there is also the possibility you sheared the exhaust wheel off the turbo (common problem on Nissan Garret Ceramic turbo's) Check the intercooler piping as well, with no load it may be just fine, but under boost it may be blowing open a piping junction enough to lose the boost.
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how do you fix the stuck-wastegate problem?
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Originally Posted by TheCamel' date='Aug 7 2003, 02:25 PM
check the acctuator rod on the turbo, this is a common overlooked problem. The turbo will spool up, but the wastegate flap is hanging wide open bypassing all the gasses causing a no boost condition. Is there a heavy black smoke exiting the rear in the area you should be boosting in the RPMs? Have you pulled off the air filter inlet tube to the turbo and checked if the turbo is free spinning? Although I have not heard of it yet on a 13b, but there is also the possibility you sheared the exhaust wheel off the turbo (common problem on Nissan Garret Ceramic turbo's) Check the intercooler piping as well, with no load it may be just fine, but under boost it may be blowing open a piping junction enough to lose the boost.
mike |
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