hi I have 91 z with 305 tpi when I sit at a stoplight it idles at like 5000 or 6000 then dips like its gonna die but then it goes back to 5 or 6000 any suggestions???


then today I go to leave at a stoplight and I get to 35-40 mph then the car drops idle and dies but starts right up but it will run ok under 35-40 I am guessing fuel pump does anyone else have the same idea or is there another prob.

oh btw no ses light on either prob.

thanks

 

Start by checking your IAC and TPS.