fivepointohman Posted April 3, 2008 Report Share Posted April 3, 2008 Ok, finally put the car back on the road yesterday, put 40 Miles on it ran great! Today I decied to buy those GM / Cadillac Coolant Sealing Pellets that I was told is recomended to run in the Northstar Motors. Well, After putting 5 pellets in which is what the package said, The car now heats up to the last white line and is hard to get down at 12 oclock or less. I just installed a 170 degree thermostat ( 10 degrees cooler from stock ) last week and it ran cool and excellent, I also flushed out the antifreeze. Now it Heats up, Is it the pellets or something else? Now the idle, I Have to constantly replace the IAC solenoids on this car. This one lasted about 200 miles before it begins to stick and randomly run high etc. What gives? Bad ECM or is it faulty crap parts? I am buying them from napa. No codes from it ( yet ) but I am sure it will, I hate coming to a light and having the car race at a dead stop. Not good for this car at all. i was thinking a faulty ground possbibly to the engine causing the IAC to get fried everytime? Car has a new Mass Air, and a New TPS as well. Any help would be great as I am driving this car to SC next week and dont want any issues.. Let me know.. Thanks in advance everyone! Link to comment Share on other sites More sharing options...
This topic is now archived and is closed to further replies.