i have a 1991 camaro rs 5.0 305 that surges after car warms up and drops rpm when crusing..... computer keeps burning up replaced map,maf,egr,tps an many others, 3rd comp. i have gone thru..... resitance all over 20... any ideas r welcome and thanx in advance..

 

Have you checked your alternator output across the RPM range? I'd also check the engine grounds.

 

X 2

 

Definately! Had the same problem!