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Tuesday, May 1, 2012

1994 Toyota 4Runner: Stalls and Stops While Driving?

The car runs fine,but after few minutes of driving it starts stalling and at last stops completely.The vehicle will not start till its cool down.And this same start stop cycle repeats.

In this types of cases i will say,When it is in the no start condition. Do you notice whether or not the check engine light is illuminated when you turn the key to the on position.If yes then scan for error codes.
IF not,then read further troubleshooting:----

Depending on the miles it is unlikely that a fuel pump would be the problem. Fuel pumps are not normally known to go bad on this truck. However if you have excessive amount miles over 200,000. It's possible the pump could be heating up and failing. The only way to know this for sure would be to put a fuel pressure gauge on it and drive it until it quits then monitor the fuel pressure. Normally idling issues are always related to the idle air control motor IAC which is bolted to the bottom of the throttle body. This will cause all kinds of idling issues and stalling.
However normally it will start right back up. If you have some type of sensor input malfunction. This can only be determined by checking for malfunction codes. This particular year uses the old jumper wire method in the diagnostic check connector box. By placing a jumper wire in TE1 over to E1 then turning the key to the on position and monitoring the check engine light. If the light flashes steady and continuous there are no codes set in the system. Otherwise if there was for example a code 12 it will flash one time a slight pause then two flashes. If there were any other codes they would follow after slight pause then the system repeats itself after a 3 second pause. I have seen a few ignition coils fail given the description that you have. It's possible that you're losing ignition because of a bad coil. Unfortunately there are a lot of things that can cause your scenario. It's just a matter of ruling out one at a time.

This details will help.
Thanks.


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