i have been haveing this problem for a while now. after the car reaches normal temperature, occationally the tac will jump and the engine will lug. i though that it might be a bad ECM but that did not do it. What really bothers me is that somethimes it will do it to the point where i cant drive the car too far... other times it will do it for about 10 min... and other times it wont do it at all! if anyone has any suggestions they would be much appreciated THANKS
john

 

My car does the same thing. Not as bad but Ive tried changing fuel filter, changing exhaust, changing plugs and wires, nothing helps. Anyone with ideas please help

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87 2.8L
Stock...for now

 

i've been having the same problems - im gona try changing the egr valve and O2 sensor - I've already replaced the whole ign. system...

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91 z28 lb9 5 speed - hooker 1 5/8 headers - high flow cat- full 3 inch exhaust - home made ram air - tpis airfoil - dual chamber flowmaster - Stage 2 Jet Chip and 160 stat - 8 mm Msd plug wires - 55,000 v hypertech coil/rotor/distrib. cap - Mac. White face gauges - lots of sound system crap...