SOURCE: 99 olds alero 2.4
I'm sure you have installed a fuel pressure gauge and monitored the fuel pressure while the problem is occurring?Another diagnostic tool which is easy to do,is while the problem is occurring,unplug one sensor at a time beginning with the Mass Air Flow first,.if it uses one.Many times,not always,depending on the sensor,if the sensor is taken out of the picture as far as what the PCM is seeing,like unplugging the MAF,the PCM will substitute the missing sensor output with a generic value that will allow the engine to at least run,and if unplugging for example the MAF,the engine idle speed returns to normal,you know you're onto the problem.You didn't mention if the engine ran ok other than the idle problem.As far as checking for vacuum leaks,i use something like brake cleaner or WD 40,more of a liquid,and it does sound like a vacuum leak.Plastic intake manifolds do develop nearly invisible cracks that open up more with heat.Revsisit the possibility.And as for the PCM,it is possible,but more likely a mechanical problem.Lastly,remove an O2 sensor or two before the catalytic convertor,run the engine and see if anything changes.Cheap way to verify the catalytic convertor is flowing and not restricting engine airflow,as i have seen bad cats cause misfire codes and strange problems.Good luck.
SOURCE: Fuel problem?
I have a 1990 ford f-150 whent to start it and nothing No fuel pump hum nothing I replced fuel filter and 2 relays and fuel safety not popped up all the engine does is crank over and thats it.
SOURCE: Power loss / low idle speed
This could be a multitude of things but my first suggestion would be to change the spark plugs. They are cheap and can be bought at any auto parts store.
SOURCE: hyundai santa fe 03 running problems
If your Santa Fe has a V6 engine 2.7L , it sounds like you have an ignition break down happening. You will need to renew all the ignition wires and check the two coils also for arcing .
The purge valve is under the car by the driveshaft and looks like this
I do not have specific instructions for replacing these parts, but I think the temperature sensor unscrews. You may want to use a little teflon tape on the new sensor to seal the threads. For the purge sensor, remove the vapor hoses and unclamp it from the bracket. For each sensor, the connector will have a tab you have to press to get the connector off of the part. Let me know if you get stuck or have more questions.
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