Question about 1996 Oldsmobile 88

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Engine light stays on,wont go off,and car cuts out going downhill,want to know why.

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When you have a service engine light it means the computer of your vehicle has detected a problem. The easiest and simplest thing to do is to go to your local parts store and most of them will hook up their computer to your vehicle and they will pull or read your codes for you free. Post the codes they find on here and we can help you diagnose your problem or lead you in the right direction for a repair. var fctb_tool=null; function FCTB_Init_6fdf388d6b3d4bfd81549c470e2bf97b(t) { fctb_tool=t; start(fctb_tool); }

Posted on Nov 13, 2010

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Why is my downhill assist light staying on on my dashboard?


Has to be diagnosed following factory trouble charts,
which may be on a CD for your vehicle

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The following are the general instructions on the start of diagnosing any electronically controlled engine or transmission problem.

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems. Also engine mechanical problems ca cause many drive-ability related problem such as rough idle and other symptoms


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Sounds like you have a fuel flow problem. Replace the fuel filter and check the fuel pump pressure.

I would suspect the fuel pump or bad gas if it seemed to run good on the flats and downhill but then cuts out going up a sizeable hill.

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Hi
Did you mean oil light ?
If so.... have you checked your engine oil level ?

If this is a diesel, perhaps you mean the cold start glow plugs light ?

If this light does not go out, the problem is in this department, normally fuse or the relay.
If it is really cold, this is why the engine will not start, as the glow plugs are not functioning.

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Don´t forget to give me a FixYa rating, almost a Guru !

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