Engine Cooling problem
1999 Pontiac Montana 6 cyl Front Wheel Drive Automatic
Had upper and lower intake gaskets and head gasket replaced by a shady mechanic. He seemed to get my coolant to stop leaking. Worth $1000? Not too sure.
Can not go back to see him anymore. Trying to avoid jail. Can not sue him. Dont think he is legal. Oh well. Trying to fix issues myself as I am out of money. Thus, driving a 99 van.
Had to pull upper intake back off to replace a bad coolant temp sensor wire. Did not replace gaskets as they were brand new and looked fine. Now, can not get coolant system to hold pressure. Have installed 2 thermostats, temp senor w/ wire, and a water pump.
Tried to bleed the system several times. No luck. Coolant not leaking from anywhere. Heat is hot. Fans work as they should. Still overheating at a stop. Low coolant light comes on every few minutes. Any ideas?
Next, Engine starts and idles normal. Push the gas peddle while driving and RPMs go very high and speed does not respond as it should. Sometimes pedal goes dead as if the engine was turned off. When RPMs drop down below 1000 it will pick back up and go. Also getting a bucking throughout the drive range. Repair manual says check emissions vaccuum leaks and wiring. Hoping to narrow it down a little. Throttle postion sensor is new. Removed idle air control valve and cleaned it. Very dirty. Unpluggd mass air and it runs worse. All wires have proper voltages. Connections are hard to check but all pins look good. Going to try to clean EGR today. Cleaned throttle body already. Replaced computer as well. Any thoughts?
have the same problem?
Thursday, June 10th, 2010 AT 11:49 AM