Run fault codes and check for ambient air temperature sensor fault and check gear box for sensor/servo problems
SOURCE: my car is chevy trailblazer 2002 .
You need to get the codes from the computer. It could be the cam position sensor, bad coil, injector/s.
SOURCE: 97 lumina, 3.1. Starts runs smooth, drive for 30
I just recently have been fighting the same problem with the same make/model/year vehicle. For myself, I would drive off and on through the day and it would run fine. Then suddenly after a start it would run rough and die. I would have to wait 20 to 60 mins before it would start again. I had it checked and fuel pump was only putting out around 19 psi. It should be around 41 psi. Had fuel pump replaced and no more problems. Furthermore, now it runs so much better. It's funny how over time I didn't notice how the performance was slowly degrading. Unfortunaley fuel pumps for this car run around $300.
SOURCE: After my car has been
Hi
The voltage regulator could be defective - have the alternator checked. Using a procedure called "full fielding the alternator" that causes the alternator to put out maximum current will reveal which component is at fault. Most auto parts store like "AutoZone" and "Checker" can test the battery and alternator in their parking lot free of charge.
Let us know if you have something more to ask else please accept the solution.
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SOURCE: 1998 accord Ex. in
Hi,
The first thing you need to do with this car is have it scanned for error codes. Autozone will do this for free and their OBD diagnostic scanner will retrieve any error codes stored in the vehicles ECU.
The reason for this is that an intermittent fault like this is very typical of a faulty engine sensor. The working diagnosis given your description, is extremely typical of a faulty crankshaft sensor.
However, it is extremely important to have the error codes checked with the OBD scanner to prevent throwing money at the problem with the incorrect replacement components. There are other potential causes for this behaviour but a faulty crankshaft sensor is the most likely fault.
The error codes will confirm this to be the fault or point to the offending component with more certainty.
Thanks for using FixYa. Please do leave a vote for the solution.
SOURCE: 1994 Jeep Cherokee Sport 4.0
It sounds like you have a weak alternator or you have a serious electrical issue. Have charging and starting systems checked.
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I checked the error code from the OBD and the crankshaft sensor had failed several times. I replaced the sensor and engine is running smoothly now and the starting problems are gone.
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