Question about 1991 Oldsmobile Ninety Eight Regency

1 Answer

Crank no spark check commentsI found my wires from my ignition control module leading to my crank and cam sensor were fused together. Exposed wires everywhere within. Can this fry my ECM aka computer?

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  • Oldsmobile Master
  • 4,977 Answers

Its possible. to know it will have to be checked out from the crank and cam sensors and ignition module to the ECM to know for sure.

Posted on Oct 18, 2015

Testimonial: "I found out it was my ignition control module, which I had it tested 6 times and they all said it was good. I will put up the All Data test. Such a head ache I tell ya. I checked all wires and replaced along with two pcm and crank sensors, thank god autozone has a return policy so you get a new one for free on returns."

  • Garrett Butler
    Garrett Butler Oct 19, 2015

    Thank you for your answer man. I will post the All Data info, so hopefully nobody else chases their tail off on it like I did.

  • Garrett Butler
    Garrett Butler Oct 19, 2015

    Make sure you have them do the resistance test on your Coil pack and make sure thats good. But, here's the other check list right side up, sorry.


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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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  • 169 Answers

SOURCE: 1994 Oldsmobile 88 Royal- Intermittent shut down and no restart. I need major help on this one!

Well dan after 13 yrs at gm I have found a couple of these. one really got me. First I know it sounds funny but you need to pull the carpet back on the dr. and pass. side and check the ground splices as they are connected to every thing in the car from front to back. they are a black connector taped into the harness and connect all the grounds with a steel buss bar. I always cut all the wires and soldered them together and re-tape em up. this problem would sometimes come with the engine dying when trying to roll the power windows down, or intermittent window operation. Second I had one car i really lost my **** on... it would stall on the cust. on HIS dirt road for him at times. I tried a couple of sensors and a ecm as each would look bad depending on the frame the scan tool would freeze on. The only thing that fixed the car was removing all the grounds on the engine and grinding them clean, replacing all the ground ends and reassembling. That prayer i said when the guy picked might have also helped but the car never stalled again and the cust returned for his next two car purchases. this is one heck of a problem you have here-sorry. I have had to wire in lights to the grounds and powers for the injection while driving before also. remember the pink and blk. wires for the injectors is hot with the key on.
good luck..

Posted on Aug 31, 2008

  • 17 Answers

SOURCE: ecm module gone bad psooiblely

Clean and tighten your battery cables. I have a 95 cutlass supreme that did the same thing. If that doesnt fix it, the ECM may be to blame. When the ECM went in my Olds, the car would fire but only run for 2-3 seconds. Once I had the ECM replaced it was fine

Posted on Jan 17, 2009

jake11913
  • 3 Answers

SOURCE: No voltage in ignition circuit or 5v reference wires. 95 Cutlass

check fusible links at the starter before doing any crazy wiring stuff. there should be at least two of these links atached to the hot wire on the starter. one of these i know for sure supplies power to the fuel pump.....

Posted on Dec 06, 2009

  • 51 Answers

SOURCE: 2000 alero won't start. turns over and fires but wont start

make sure your cap and rotor timing is correct double check spark plug routes (mistakes happen). maybe your timing is off in general.

Posted on Jan 16, 2010

csmock132
  • 4669 Answers

SOURCE: 1991 Oldsmobile Cutlass Supreme-there's no spark.

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.

Posted on Jun 18, 2010

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Could be a bad coil, bad Ignition Control Module (what controls the ignition coil as commanded by the engine computer), or a bad crank position sensor, or cam position sensor. Or the wiring and circuits to all the ignition parts.
Often it is the crank sensor (CKP sensor)-The pcm must have this information from the crank sensor to determine spark timing. If no good signal from the crank sensor, there will be no spark.

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Make sure battery has a full charge and battery connections all good.
If it cranks good but won't start, have a helper crank it while you visually check for spark at the spark plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
If you having a problem with more than one system, I want to check for rpm signal, that usually comes from the crank sensor. Not sure why you replaced cam sensor? I always want to check sensor wiring circuits before replacing anything. Don't replace anything unless your testing points in that direction.

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Yes, the ECM is the last thing to replace after all other possibilities. No spark could be bad ignition coil, bad Ignition Control Module (controls the coil circuits for spark), bad plug wires, the crank and cam sensors (for ECM to determine spark timing).

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Did you check voltage and ground for ignition coil assembly? You can see the fuse, it goes hot with the key on, pink wire. Black wire with white tracer is ground, check that also. You can use a test light to check voltage and ground. Engine cranking, it's the ignition module that controls spark, and yes, there has to a signal from crank sensor. You need to do some testing.
ignition module-r12hi3n0ilpue5iadwylyrlg-3-0.jpg

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It does use a crank sensor.
You would need to know that the ignition module and coils have battery voltage, then you would need a book to give you the test procedures for the computer and crank sensor.

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Cylinders 1 and 4 have the same coil for both, so concentrate on that coil. You still have a good blue spark on cylinders 2 and 3? If you have spark there, I don't know about the cam sensor-I think it would be good if it works at all. You need to check if you have 12 volts power to the coil for 1 and 4.

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FYI P1351 is an ignition coil control circuit DTC.

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