mark96
Member
Hello - I just replaced the water pump, distributor cap & rotor, and serpentine belt on my '96 LT1, and now the idle speed is surging from 500 rpm up to 800 or 900, and then back down again. The idle speed is steady upon cold startup, and begins to surge once the engine is hot. I've checked and rechecked all the electrical connectors and vacuum lines. This is my first maintenance project on this, my first Corvette, so I'm a newbie for sure. Anybody else experienced this or can point me in the right direction?
Since the parts change-outs, I have no coolant leaks, and the engine is running consistently at about 195 degrees. I believe (but am not 100% positive) that after three cold/hot/cold cycles I've now got all the air out of the coolant system. The engine runs strong and smooth with no missing or hesitation during both normal driving and more vigorous acceleration.
Since the parts change-outs, I have no coolant leaks, and the engine is running consistently at about 195 degrees. I believe (but am not 100% positive) that after three cold/hot/cold cycles I've now got all the air out of the coolant system. The engine runs strong and smooth with no missing or hesitation during both normal driving and more vigorous acceleration.