Idle jumps up and down 500 rpm

eugenewilhelmjr

New Member
Nov 24, 2011
19
0
1
georgia
I have a 84 mustang, but motor is 92, 347 stroker with no EGR valve
got gt40x alluminum heads
comp cam
trixflow r intake
30 lbs injectors
roller rockers
And I still cant fix my Idleling problem. I jumps more than 500 rpm up and down then stalls
I replace the iac valve
I dont have salt and pepper shakers
not stock wiring harness
painless wiring harness
 
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See the "Surging Idle Checklist for help with all your idle/stall problems. You can guess at the problem and throw parts at it, or you can use the checklist to help you find the problem quickly and inexpensively.

The quick and easy way to dump the codes is in there too, and all you need to do it is a paper clip! The first two posts contain all the fixes & updates. At last count there were 24 possible causes