mufftasticmonko

93 Cobra only when warm, has a stumble about 1800-2000 rpm. We have checked MAF, Plugs, wires, ignition module, fuel, fuel filter, TPS, AIC, have reset computer, EGR, and we still have the same problem. Any help would be great, thanks!

Alero99

define stumble? does it making a popping noise? may be the timing being to advanced perhaps

mufftasticmonko

The stumble is almost like a mis-fire, there is no noise such as knocking, or any other noise for that matter. The car "bucks and surges" at all RPM except at idle.

mufftasticmonko

Any ideas, im fresh out.

golden_eye

I'm not the most mechanically inclined person here, butafter skimmingthrough my Haynes manual I would suggest checking your fuel filter, spark plug gap, timing, distributor cap/rotor, or vacuum leaks

AdderMk2

vac leak, ECT and ACT.... check em!