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Old 10-12-2004, 11:43 PM
psfred psfred is offline
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Join Date: Aug 2001
Location: Evansville, Indiana
Posts: 8,150
Bad injectors will certainly cause a rough idle, BTDT long ago on my Audi Fox. One that dribbles at idle will make it shake something terrible, and ajdusting the idle mix won't help.

However, if it runs smoothly cold, you probably have an overly lean mixture warm if the injectors are good, this will cause rough running.

You should get a Mitivac hand pump to check the vac system, it has a guage so you can test for integrity. Sucking a vac by mouth will only detect major leaks in my experience, and you really don't want all the residual stuff in there in your mouth anyway! There are several restrictors in the system, so you will have dampers closing with only a minor drop if vac. Worst part I found on the TE after replacing all the servos and getting exactly what you have was leaking right angle fittings on the switchover valve. Minor leaks here allowed the dampers to partially close while accelerating.

You should have a reservior in the system to "float" it over the low vac caused by acceleration. However, if the mxture is off, you will be low on vac anyway, and will no have enough.

Peter
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