Every time i shut the car off the computer dumps evevything and is blank also the insterment lights will start to go out and all that is lit is the oil light when the switch is on the batt light temp,air bag,check motor,and the rest go out after 5 sec with out starting car i have checked fuses wires none burnt nor cuthad emmisons test done 2 times at shop but aborts test
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It could be the computer. It could be a relay or something in the wiring harness too. You would need a shop manual to get the wiring diagrams and test procedures to find the problem. You need to know if the coil assembly and injectors are getting power from the ASD relay, and if the computer is getting signals from the cam and crank sensors.
On the side of caution, it's not good to drive around with the light on. ou could be doing some damage.
Take your car to your local auto parts superstore, and have them scan for the fault code that is making the light come on. And take it from there. ANother thing you can try, is disconnect the neg. battery terminal for a couple of minutes. Then reconnect. Start the car, and the light might not come on, until the fault code recycles. Car might drive a little odd next time to go out driving. The computer has to recycle, so to speak. Hope this helps.
A faulty Intake air temperature sensor can cause that. If it's faulty and supplying computer with a signal that says it's freezing cold, when its not, then it would cause it to dump excessive fuel, when it isn't necessary. Might be smart & cheaper, to run it in and have it scanned for codes, at an auto parts place, or trusted mechanic. With all these sensors that can cause similar symptoms, why gamble, have it scanned & know for sure.
Check your spark plugs and wires. Ensure they are all correct coming off of the distributor cap. You may wanna even change them (plugs, wires, and cap) just to make sure they are all in good working condition and you put them all on in the correct placement/order.