eaa1964
05-18-2006, 11:50 AM
engine runs rough/stalls out during the warm up phase. usually drives fine at temp.
1995 GMC 1500 4x4 5.7L automatic.
NO CODES, NO ck engine light.
I have changed plugs, wires, coil, dist cap, rotor and distributor module. MAP sensor.
I notice this problem to occur when COLD outside(under 60 degrees)-despite being parked in a dry garage. Car starts right up, you must give it steady gas until it is warmed up, even then I experience some of the following. More often than not, once it comes up to temperature, you can drive it. if you drive it when cold, it is sluggish, revs on its own, lunges, stalls at stop light unless you throw the automatic in neutral. once up to temp-drives fine.
any thoughts?
looking forward to your suggestions.
EAA
1995 GMC 1500 4x4 5.7L automatic.
NO CODES, NO ck engine light.
I have changed plugs, wires, coil, dist cap, rotor and distributor module. MAP sensor.
I notice this problem to occur when COLD outside(under 60 degrees)-despite being parked in a dry garage. Car starts right up, you must give it steady gas until it is warmed up, even then I experience some of the following. More often than not, once it comes up to temperature, you can drive it. if you drive it when cold, it is sluggish, revs on its own, lunges, stalls at stop light unless you throw the automatic in neutral. once up to temp-drives fine.
any thoughts?
looking forward to your suggestions.
EAA