Question about 1991 Oldsmobile Ninety Eight

1 Answer

Where is the PCM located on a 1991 Oldsmobile 98 Regency elite?

My 98 gave me problems stalling upon deceleration. I took it to a guy who ended up throwing parts at it and not fixing it so i broke down and took it to a GM dealership for analysis. They told me the PCM needed to be replaced. I'm not really trying to pay $700 for the labor for a part I can get for a fraction of that. What i need to know is where is the PCM located? I just want to get to it and get it replaced! Thanks!

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 4 Answers

The PCMor powertrain control module is only on 1996 and newer cars.Earlier models have a ECM or electronic control module/pcm.You want to change the ECM if its a 1992.Its located under the right hand side of the instrument panel.The ecm has a prom( programmable read only memory)in it.You will need to remove this from the old ecm and install in the new ecm.The ECM/PCM can be used in many different GM vehicles but the prom is very specific and must be used only in the vehicle it was designed.The prom will not come with the new ecm and must be carefully removed and installed on the new ecm.There also is a CALPAK in the ECM ( A devise for fuel delivery) This may come with the new ECM But make sure all parts are the same.You should get a vehicle repair manual to do this job correctly,and make sure you do not damage your PROM.Your PROM is very IMPORTANT!

Posted on Jul 05, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2009 Jeep Lib Speedometer Stops, Stalls and LIghts come on


no , you were told wrong, but ABS is bad too. (or was just the stall resetting ABS to self test mode)
you have 2 independent failures.
1: brakes. (if ABS is on,, not stalled !!!)
2: engine. (this is IT, fix this)

you are guessing at ABS parts.? just throwing them. why do that?
my guess is you have a mech, and you want seconded guessing
on line with blind folks here.


the engine stalls moving,
that usually means the ASD relay dropped out, did the IMMO light come on? you need to look at what all lights did in the cluster at stall.
a stall causes rapid deceleration and loss of all engine power
and RPM drops and MPH drops and at the point of stall
all Cluster lamps go ON. they go to key on self test mode as
stated in the users manual. (lost sure)
to witness this, key on, no start, and bingo the self test happens.
those are NOT failures. its just a self test. Per manual.

Does the ABS stay off driving and not stalling or stalled.
yes, then ABS is ok......

did you take it to a shop (crooks) and tell them my ABS is on?
and they see it's out, and go, gee we can make some cash here for nothing. if you tell them wrong, they will in fact guess, and make you broke fast.
ABS can go on just with a bad brake caliper pad. a $10 part.
if car stops ok, and the lamp is out RUNNING !!!!
Then leave the ABS alone. why assume the most expensive part on car is bad, why do that...???? why not put on new pads. and rotors.
first. then test the ABS. ABS is not magic it cant help stop any car with bad manual brakes. not at all.
end brakes; now back to ENGINE.


then fix the stalls,
here is the stalls list, for only the ASD.
(even a tuneup, will end stalling)

THE ASD is the funky Jeep thing, that kills the engine for many a reason. (there are tests for each case failure)

http://www.fixkick.com/Jeeps/ASD.html


if the CEL lamp comes on driving < NOT STALLED)
then connect any scan tool, to the DLC connector at knees.
and scan the PCM for DTC errors.
then post those.
keep in mind, errors can AUTO clear, so not seeing them
in REAL TIME< means you missed the boat.
that is, you didnt get the facts of the failure.
but errors still in effect are stored and you can in fact
scan them parked, key on.
the CEL is only a SMOG light, you must scan to see the other 100+ errors. possible.

Better:
find a real ASE shop, and ask them to fix the stalls, (car stops good)
then they will fix that
and by magic the stalls are gone and the dash lamps go happy.

Mar 25, 2014 | 2009 Jeep Liberty

1 Answer

Delica diesel '98 space gear 2.8 turbo diesel. We are second owner 180,000 km. Problem is black exhaust when first starting up and then once accelerating between 80 to 100 km/ph no smoke. When decelerating...


I think you have leaking injectors, after shut off raw fuel dips into cylinders and then on start causews the black smoke unitil it is burned off. Any dealer has the equipment to leak test the system.

Feb 19, 2014 | Cars & Trucks

1 Answer

So i've recently run into a problem where the bike


If it was a two cycle I'd say it was clogged exhaust ports. But you have a pretty exotic bike. So I guess it's a timing issue dealing with the exhaust Ox sensors.

Aug 30, 2012 | Cars & Trucks

2 Answers

CAN A IDLE VELVE CONTROLLER MAKE YOUR CAR CUTTING OUT WHILE DRIVING


It is called an idle air control valve (IAC), and it will cause stalling at idle or while decelerating to a stop, but engine stall while driving at steady speeds, no that will not be the fault of the valve.

May 17, 2012 | 2005 Volkswagen Microbus

1 Answer

'01 Nissan Sentra stalling when stopped - shop has had it 5 months: help!


If the idle air control valve is working, the passage may be clogged. Other things to check are the PCV flow and possible vacuum leaks.

Please see my tip at http://www.fixya.com/cars/r7427423-fix_poor_idle_high_idle_stalling_fuel . These are generic instructions. If you get stuck or need specific instructions for your car, please get back to me with engine size info.

Dec 30, 2011 | Cars & Trucks

1 Answer

1996 Dodge Stratus stalls when starting


I had this problem with my 99 Durango and went to AutoBeef.com to discover this was a major problem with 98 & 99 Durangos. The fix was easy -- PCM "brain" was exchanged with a refurbished PCM "brain" from an online PCM company in Florida. You can google as I can't remember name of company. I called them and they said - Yep this is the fix -- the guys told me 3 screws all I had gone to several mechanics and dealers -- none could figure it out. I was so grateful that someone gave me the clue I needed.

Apr 03, 2009 | 2004 Dodge Stratus

2 Answers

98 blazer ls stalls all the time


Sounds to me to be a ground issue. I don't know how much of a machanic you are, but i think its time to take the bull by the horns and maybe fix it yourself. What you need to do, and you may get alittle dirty in the process and it might take a while is find every ground wire and strap( and hot wires too) check to see if there broke, loose, dirty whatever, start at the back around gas tank and work yourself forward. If you half to go to the dealers parts dept. and get a diagram of all the ground straps and ground wires for your blazer they will print you one out. Just sounds to me they want to take your money and not fix the problem.

Feb 12, 2009 | 1998 Chevrolet Blazer

2 Answers

Engine suddenly lost power on highway, would not start afterwards


check your oil dip stick if the oil is milky its your head gasket
defenetly sounds like that to me

Dec 28, 2008 | 2001 Chevrolet Cavalier

1 Answer

1993 GMC Sierra 4x4, no brake lights, no rear running lights


If you still have this problem maybe this will help. I had to replace the trailer plug on a 93 GMC Sierra K1500 and had a problem with the light's not working. Had to trace wires from trailer plug up to tail lights. The problem was a broken ground wire. It took longer to remove all the tape and replace it than fixing the problem.

Dec 15, 2008 | 1993 GMC Sierra K1500

Not finding what you are looking for?
1991 Oldsmobile Ninety Eight Logo

1,367 people viewed this question

Ask a Question

Usually answered in minutes!

Top Oldsmobile Experts

yadayada
yadayada

Level 3 Expert

70387 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6880 Answers

Are you an Oldsmobile Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...