Question about 1996 Chevrolet Astro
I recently had to have the first gear replaced in my transmssion; but my car was still shaking after the repair. They said it was due to a hole in my muffler. I had it replaced and it is still shaking while the car is idling or when I slow down to a stop. I notice it does not initially shake when I put it into other gears such as park..
Posted by Anonymous on
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Posted on Jan 02, 2017
hi from uk the symptoms you clearly describe sound like your brake servo /vacuum cylinder is at fault ie whilst brake pedal is off all is ok ? but when pedal pressed engine falters? this is a sign that the seal on the vac piston inside the servo unit is allowing air /atmospheric air to enter the servo as you brake and this assists braking however when inner pistonseal is leaking at some point inside the servo bore ie a scoared or rusty point ?the atmospheric air passes the piston/seal and so the vacuumpipe to servo is drawing this air into inlet manifold resulting in upsetting fuel mixture ie weak too much air ratio to fuel resulting inshaking engine you describe ? try this?? if you disconnect vac pipe from servo unit then seal off the pipe with thumb then ask assistant to start engine then it should run ok ? also it should be ok when b/pedal pressed remember there will be no vac assistance ?? if above test prove right ? then you will req a new servo unit only not complete master cylinder too ? you can diy this then bleed brakes after replacing servo ? hope this helps
Posted on Feb 27, 2010
Sounds like your bands are locking up and sticking.
This is usually caused by worn bands or very dirty transmission fluid. the cheap fix is to change your transmission fluid and filter. If that doesn't fix the problem, your forward bands or servo may be worn out, which will require a rebuild.
Posted on Mar 09, 2010
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