Question about 2000 Chevrolet Tracker
It sounds like your ECU is failing when it sits in the heat for a while. It's probably due to a faulty solder joint, and the heat may cause the board to warp momentarily, causing the engine to shut off. After the board cools down, you can start the vehicle again. You can test this by using a large fan, sealed ice pack, or similar to cool the ECU, while running the vehicle. If it sits and runs fine for longer than usual, replace the ECU. If it still shuts off, you may have a sensor that is failing when it gets hot, which will probably cut the spark, causing it to not start until the sensor resets. This is more complicated to track down because each sensor must be monitored while running the vehicle to know which on is failing when the engine shuts off.
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Posted on Mar 13, 2011
You can check the timing sensor by pouring cold water on it. It is mounted on the back of the engine just below the top off the valve cover.
Posted on Jul 18, 2012
Had the same problem . it ended up being the cam shaft sensor
Posted on Apr 28, 2012
Also check the iac idle air control valve. the stem on the inside gets warn and then it falls and closes all the way. the pcm can't read that the stem is warn. so then the issue is a needle in a hay stack or phantom mechanics call mites. it mite be this and it mite be that. then u pay big bills. it wasn't on the codes and the ohms test was a pass. when i took the iac valve off and hooked it to its power and turned the key to its on position a few times the stem fell right out. if this helps please feel free to spread the word to help others save big cash.
Posted on Aug 23, 2015
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