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Re: No boost! Posted by RS [Email] ![]() ![]() ![]() In Reply to: No boost!, peter charak, Sun, 25 Jan 2004 20:34:35 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Did this happen suddenly or gradually? Any seat-of-the-pants feeling of a decrease in power?
If it doesn't cough, buck, and spew black smoke when you accelerate, then the boots and hose clamps between the turbo, intercooler and throttle body are probably ok. (It wouldn't hurt to check them anyway on general principles.)
As an Instrumentation Engineer, one of our phrases to live by when something appears to be wrong is "check the connections first".
Having it only go to atmospheric makes me think that there's a bad connection, maybe a hose sits loosely on a vcuum nipple or a vacuum nipple is loose in the manifold. Check the vacuum hose that goes from the intake manifold back to the pressure sensor and boost gauge. On my '88 & '89, it goes back from a vacuum fitting on the side of the intake manifold. On an '86 I saw, it went back from a T-fitting.
Check the vacuum nipples to see if you can pull them out with little effort.
If you haven't done so already, it's not a bad idea to replace all of the vacuum hoses and rubber bushings that hold the vacuum nipples into the intake manifold and valve cover.
posted by 63.148.1...
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