The other day I was driving my 86 lg4 iroc and it was running perfect.I got to where I was going and it wouldnt idle,its bumping up and down(tach)from 500-1300rpms and above that it runs fine.This happen all of a sudden,and Im not getting any codes.I have checked vacum lines,not it.because it pulls strong above 1400 im guessing its the carb and not dis.?

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~mike~
1 superclean 86IROC-Z

 

did you get a recent fill up? You may have some H2O in the gas.

 

with water I would think it would do it at high speed too?Im sure its not water.or I think.

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~mike~
1 superclean 86IROC-Z