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Car dies - acts like it's not getting fuel - will start 20 minutes later and sometimes will run weeks or months before it does it again and other times it will die immediately again. what is it?
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sometimes ive found that a bad or going bad oil pressure sensor was the problem. This sensor in some cars and trucks when bad doesnt let the fuel pump get enough voltage or none at all. This could be your problem.
Keep it simple and replace the fuel filter first, if thr fiiler has not been replaced within 30,000 miles or 1 year. Then it's a good chance that it's going to be the fuel filter.
I had this problem once with a Jeep Wagoneer Limited. The combustion principle is most simple. You have fuel and you have spark. Since you are getting emission failures because of unburned fuel, I would start with the spark.
Most modern cars don't use points anylonger, but an electronic computer circuit to generate the spark. These can be very temperature sensitive. In my case, whenever the car would get warm, it quite and left me stranded, 20 minutes later, it would cool enough and run again as if nothing had happened.
I would try locating the spark amplifier under the hood and get a replacement. This is likely to solve the problem.
i would check your ignition system. you would need a meter for this but look for broke or loose connections. if it was a fuel problem i dont think it would just start up after 20 minutes. or you might try your ignition switch. if its shorting or something then ya well it would cut your engine off real quick
Do you have the shop manual? You need verify the workings of each part and system one at a time. Follow the working line. You stated you checked the fuel pressure. Where was it checked? At which location? Was it checked under throttle? Does the fuel regulator check out? Is the fuel good (any water)? These problems can sometimes be a bear to find. It takes time and patience. Do one thing at a time and verify that it works properly before moving on to the next part/attack plan. Check all ground conections from the block/engine to the frame/body. Once you verify that the fuel delivery is good, start looking at emission related parts and fuel management parts (TPS, MAF, Cold start injector, EGR, etc.)
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