Question about 1991 Oldsmobile Cutlass Supreme

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Changing the spark plug wires

Where is the spark plug wires on a 1991 Oldsmobile Cutlass Supreme 3.1L engine?

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3 on front and 3 on back of engine. the wires coming from coils,on top back of engine,

Posted on Sep 03, 2009

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1 Answer

Engine spins over no fire at plugs


sounds like u have a problem with your coil pack that is what sends spark to plugs

Apr 05, 2014 | 1991 Oldsmobile Cutlass Supreme

1 Answer

I can't seem to start my 84 Oldsmobile cutlass


DID YOU GAP PLUGS CORRECTLY? CHECK TO MAKE SURE SPARK PLUG WIRES ARE IN RIGHT FIRING ORDER QUESTION DOES ENGINE TURN OVER LIKE IT WANTS TO START???? CHECK ALL FUSES SOME HAVE STARTER RELAY FUSES ALSO MAKE SURE TRANSMISSION IS FIRMLY IS PARK MAY HAVE A STARTER SAFETY RELAY CAR WONT START UNLESS PARK IS ACHIEVED.....GOOD LUCK

May 09, 2012 | 1985 Oldsmobile Cutlass Supreme

1 Answer

My 1991 cutlass cierra oldsmobile is not firing. i replaced the fuel filter fuel pump and the crank shaft sensor. After that it did start up now it is doing the same thing as before just turning over but...


Hello,

Pull a spark plug wire and put a screw driver in the boot and lay it next to something steel on the engine, do you have a spark?

If so pull a spark plug and see if it is wet, like water wet. Are you low on coolant or loosing it?

These engines have a intake fail issue, the upper intake will not can, but will leak, when it dose it sends coolant down the intake and wets the spark plugs. Crank the engine over a few times before doing this.


The best way to know for sure is to remove the Throttle Body and look inside the intake with a flashlight.

You may be able to get away with removing the screen from the Throttle body with snap ring pliers and opening the butterfly and looking in, but that mesh is very hard to remove and install.

Good luck

Dec 29, 2010 | 1991 Oldsmobile Cutlass Supreme

1 Answer

Changing Spark plugs for friend and she said you can't get to the ones at the fire wall what to do?


you can pull the wishbone mounts on the front of the engine and with a pry bar roll the engine forward and put the bolt from the engine side of the wishbone mount in the original hole in the engine side of the mount. this will allow enough room to get to the rear plugs.

Dec 02, 2010 | 1991 Oldsmobile Cutlass Supreme

1 Answer

1991 Oldsmobile Cutlass Supreme-there's no spark. changed module, crank sensor, ecm. pls advise...


Check the wire from the module to the crank sensor. They go bad. Usually from oil leaks. Is it saturated with oil where it goes under the engine? Also check for power and ground on the two wire plug on the drivers side of the module. It isn't the ecm or anything with it. The ignition system on the 3.1 will work with the ecm unplugged. The ignition system is a stand alone system. It sends signals to the ecm for the fuel injection.

Jun 18, 2010 | 1991 Oldsmobile Cutlass Supreme

4 Answers

1991 olds cutlass supreme with a 3.1 v-6 the engine


I am having a similar problem, but there is no check engine light. It seems that mine dies at the light or running, if the rpm's drop. I am wondering if the Idle air control valve is bad or possibly the ERG valve?

Feb 03, 2010 | 1991 Oldsmobile Cutlass Supreme

1 Answer

91 olds cutlass 2.3 having problem with gas mixing with the oil......... the 2 outside plugs are dry and the 2 middle plugs are wet with gas


The wet plugs are not firing. The engine must be running rough. Check for spark on the middle two. Find the problem and change oil and filter.

Dec 04, 2009 | 1991 Oldsmobile Cutlass Supreme

2 Answers

Falls dead when driving, will restart after awhile


Did you try checking or replacing the coolant sensor? I think you should replace it along with the thermostat. Are there any problems like sputtering or any unusual noises or symptoms? Smoke, anything?

May 06, 2009 | 1991 Oldsmobile Cutlass Supreme

1 Answer

Where can I find a spark plug wiring diagram for 1997 3.1l engine


Normally the firing order will be stamped on the top of the intake manifold also the number one plug will be the front one on the drivers side of the car. On the top of the distributor cap you should see a number one that is where the number one plug wire goes follow the firing order on the manifold and go clock wise on the distributor cap

Mar 18, 2009 | 1997 Oldsmobile Cutlass Supreme

1 Answer

1991 oldsmobile cutlass supreme


Check for fuses/power/ground to the engine computer (or injector drive computer) whatever the case is.

Spark, fuel pump, and starter all are independant of the fuel injection computer.

Either the computer itself has gone bad, or it is not receiving power or ground, or wiring to the injectors might be bad...

Aug 28, 2008 | 1991 Oldsmobile Cutlass Supreme

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