20 Most Recent 1991 Oldsmobile Eighty Eight Questions & Answers

brake sensor switch and clutch pedal sensor switch can be faulty or if automatic , the VSS sensor can be the cause of the problem

so changed spark plugs after or before run over puddle?

Fuel, Spark, and Compression. All very nessessary. If the new coil pack is in fact still good, it still requires voltage and a signal. fuses, relays,crank sensor,even the ignition switch could be the problem if it doesn't. If it does you can pull a plug wire and check for spark with someone turning the key as you watch for it to arc to ground on the block , DO NOT Hold it in your hand. My brand new coil only lasted a year and my ignition moduale died when I came out of the bank with no warning or indication what so ever. Fuel pumps love to die unexpectedly especially with a clogged fiter. Atatching a fuel gage to the fuel rail is the safest bet but depressing the vavle stem and gassoline spraying out will be a good sign the pump is working. some cars bleed the pressure with the key off and the schrader can be pulled and a hose atatched to direct it into a container. but the olds will most likely still have some even with the key off, and you got to know, safety glasses, no smoking The vacuum hoses under the hood have turned to mush or just cracked on a '91 by now. I'm sure you do not want to hear about compression.

disconnecting the battery for a couple minutes should do it on pre OBD cars that came about in '96. I've learned odd tricks such as turning the key three times or othters involving the trippometer to pull codes from various late model or post '96 OBD cars but know of no procedure for your '91

Follow the positive wire from the battery to the starter, olds put the starters on both left and right side of engine, jack up the car and place jack stands under it, there are two 9/16 bolts that hold the starter in, slowly lower the starter and diconnect the two wires, one is the positive wire from the battery and the other one is the exciter wire that activates the starter , pay attention to the smaller wire where it is attached, very easy job.

little more info like year make model engine size would give me the ability to give you a more complete answer. You will find it towards the rear of the block where the block and bell housing meet so it can turn the flywheel or flexplate to start the engine. if it is a northstar you will find it located under the intake manifold. Make sure you disconnect the battery before you do anything, thats a shock you will always remember

common problem,4 bolts at the tilt section work loose,no parts needed,just have to pull the wheel,the lock plate and signal switch,locktite on the bolts helps prevent repeat problems

Remove the fuel tank & replace the sending unit,and check for proper grounding first

You can follow the positive (red) battery cable from the battery directly to the starter.

MY PASSENGER SIDE WINDOW DOESNT WORK AND MY BACK WINDOWS YOU HAVE TO PULL UP WITH YOUR HANDS.

MINE HAS ELECTRICAL PROBLEMS, DASH WORKS WHEN IT WANTS TOO, GAUGES WORK WHEN THEY WANT TOO,RT BLINKER STOPPED WORKING. I NEVER KNOW IF I HAVE GAS.

Here's a radio wiring diagram for 1991 Oldsmobile 88, I hope this will help you out

98% of them will hook-up to the other radio,

The fuel filter is located: Under vehicle, driver side, below seating area, near fuel tank, mounted on frame rail in fuel line. I hope this helped and good luck.

Does the compressor clutch turn on?

You have an obstruction in the line. Recover and evacuate the system of refrigerant. Open up the line and remove the obstruction or replace that line.
Then pull a vacuum to at least - 20hg's for 10 minutes . Test the system for leaks by turning off the vacuum pump and making sure the gauge doesn't move for one minute . recharge and hope for the best.