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Are you looking for possible causes or would you like me to walk you through this diagnoses?
Can I start by getting any stored codes in the computer?
Well, I can still help and give you some possible causes if you would like and if you are still willing to pay for my service.
Ok, can I get the computer code numbers?
The problem could be low fuel pressure due to a bad fuel pump or restricted fuel filter. The fuel filter is located back by the fuel tank.
Another possible cause is a bad camshaft position sensor or crankshaft position sensor provided the engine is in time (timing chains have not stretched or jump time). The camshaft and crankshaft position sensor go bad very often on these vehicles causing this sort of issue.
Last but not least would be a plugged exhaust system.
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YES, the cam and crank sensors can go bad intermittantly causing this sort of issue. It is VERY common.
The engine speed circuit is the crankshaft or camshaft position sensor. These sensors are used by the computer to tell where the cam and crank are in their rotation so that the computer can fire spark and fuel. If you get the code for me, I will tell you which one this code is referring too. However, I would recommend to replace them both at the same time anyway because of their high failure rate.
The only way to check to see if the fuel pressure is low due to a bad fuel pump or a restricted fuel filter is to watch the fuel pressure using a fuel pressure tester hooked up to the fuel rail.
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