Join Date: Feb 2001
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bad idle and miss after engine warms
hello, well i have an 88 zuk that is still running stock carb. the problem is that when the engine warms up, it loses its idle and hesitates badly. if i let it sit over night it will start, run and idle fine until i take it for a drive. after it starts to warm up, it will stumble and die. runs ok if i keep my foot into it and keep it reved up.
it has a nice sequential spark on all 4 cylinders, and the timing belt is dead on with the timing marks. fuel pressure is fine. so far i have done the following:
-swapped in two different distributors
-swapped on 3 different stock carbs, one was pulled from a good running zuk so the carb was good
-swapped in 5 different carb ecms
-swapped in 2 different coils
-i played around with unpluging all of the electrical items one at a time on the feedback carb, none helped
-checked for vaccume leaks with carb cleaner, none detected
-replaced fuel filter
-redid the grounds in the engine compartment.
i have a feeling that there is an electrical issue on one or more of the wires leading to the feedback carb. my next step is to install a full MECHANICAL carb such as a weber. if that doesn't work, i will assume i have a compression problem
what the hell am i over looking??