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Re: deceleration Posted by Ari [Email]  (#2847) [Profile/Gallery]
(more from Ari) on Wed, 17 Jan 2001 11:42:04
In Reply to: deceleration, Clark, Wed, 17 Jan 2001 08:55:43 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Check your vacuum lines and also check the hooter (turbo bypass) valve. The hooter valve is a black plastic cylinder about 2 inches in diameter, with two fat hoses and one thin one. Remove the thin one at the intake manifold end and suck on it. You should not be able to pull air through. If you can pull air through, then the diaphram in the hooter valve is bad and you need to replace the valve.
The hooter valve bypasses turbo pressure if you suddenly close the throttle. Even cruising on the highway the turbo is running, and if the valve doesn't work, you'll get problems when you take your foot off the gas.
The other possiblity is a vacuum leak. If you're moving at cruise speed with your foot off the gas, you'll get a very good vacuum in the intake manifold that will find every last little leak. Check all the hoses. Remove the right front turn signal lens and look in - that's where the charcoal canister lives, and it has hoses that run to the intake manifold. Since the canister is hidden in the fender, it can be hard to see if a hose has fallen off there.
Good luck!
, Wed, 17 Jan 2001 11:42:04 <-- Viewing This Message
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