STALLS WHEN GAS IS PUSHED

Tiny
BART KOSKI
  • 1991 OLDSMOBILE CUTLASS
  • 150,000 MILES

MY 1991 OLDS CUTLASS SUPREME SL 3.1 MPFI AUTOMATIC FROUNT WHEEL DRIVE RUNS GREAT ILDES GREAT LOTS OF POWER. BUT WHEN IT WORMES UP EVERY TIME I STOP THEN TAKE OFF IT CUTS OUT ENGINEMISES AND DIES. TO RESTART I HAVE TO FLOURE THE GAS I TESTED LOTS OF STUFF NEED TO START FROM SCRATCH.

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Wednesday, June 20th, 2012 AT 2:39 AM

23 Replies

Tiny
RACEFAN966
  • EXPERT
  • 5,140 POSTS

Ok first off how old is the fuel filter? What have you tested and what have you replaced at this point?

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Wednesday, June 20th, 2012 AT 3:04 AM
Tiny
BART KOSKI
  • MEMBER

I TESTED THE O2 SENSOR(.80VOLTS TO EXHAUST.28 TO EMC.80 WITH THEM CONNECTED)
IAC(58OLMS BOTH READINGS CAR NOT RUNNING)(880OLMS BOTH WITH RUNNING)
MAP(B&C TERMNIALS5.04 VOLTS)(B&A 4.5)CAR RUNNING(2.3 IDLE)(1.69 WIDE OPEN, HIGH RPM)
EGR NEW GASKET & ENERGIZED EACH OF THE THREE SILOIDS, THEY WORKED.
CHECKED THE CAT, VACUUM LINES, GAS PRESSURE, PLUGS & WIRES,
THE FULE FILTER & MAP ARE NEW.
I GUESS THE CRANK &CAMSHAFT SENSORS ARE NEXT? I KNOW WERE THE CRANKSHAFT SENSOR IS NOT THE CAM OR HOW TO TEST.

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Wednesday, June 20th, 2012 AT 8:05 AM
Tiny
RACEFAN966
  • EXPERT
  • 5,140 POSTS

No don't go parts chasing it cost to much and I do not believe in it as a mechanic. I do believe this car has a mass air flow unit so get some mass air flow cleaner and remove it and spray the inside to clean it. If that don't help then let me know and I will tell you how to test it to see if it is bad, if that checks out then we will test the crank and cam sensors ok.

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Wednesday, June 20th, 2012 AT 2:50 PM
Tiny
BART KOSKI
  • MEMBER

Thank you for your help.I dont see a maf. Only something that looks like a o2 sensor but half the size, ppluges unto air duct under the filter.

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Wednesday, June 20th, 2012 AT 6:25 PM
Tiny
RACEFAN966
  • EXPERT
  • 5,140 POSTS

Nope no mass air flow on your car. Do you have a digital multi meter? If so I can walk you through a test on the TPS and the air charge temp sensor too (that is what is in the air intake hose).

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Thursday, June 21st, 2012 AT 1:39 AM
Tiny
BART KOSKI
  • MEMBER

OK im ready. Ive been under this hood for about a week and ahalf
and my 18year old dautgh doesnt like driving my truck. She is due in december. But with your help the car will be done soon.
Thank you for all your help.

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Thursday, June 21st, 2012 AT 4:57 AM
Tiny
BART KOSKI
  • MEMBER

Chilton says I should get less then 1.25 in idle I got.69. Wide open 5voltz I got 1.37 if I did it right
it doesent say about cranck or cam

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Thursday, June 21st, 2012 AT 11:01 AM
Tiny
RACEFAN966
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Ok that sounds about right for the TPS. Now if you would ohm the air charge temp sensor thats the sensor in the air intake hose. Let me know what you find and we go from there.

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Thursday, June 21st, 2012 AT 3:40 PM
Tiny
BART KOSKI
  • MEMBER

At setting20k I got 2.17olms. Thats the air charge temp sensor. What should it be? I tested it unpluged key off.

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Thursday, June 21st, 2012 AT 9:22 PM
Tiny
BART KOSKI
  • MEMBER

I thought the reading for tps wide open throdle was low?

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Thursday, June 21st, 2012 AT 9:25 PM
Tiny
RACEFAN966
  • EXPERT
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No W.O.T should be 4.5 to 5 volts no more because the computer only sends it 5 volts.

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Friday, June 22nd, 2012 AT 12:08 AM
Tiny
BART KOSKI
  • MEMBER

Ok what about the test I did on the cold air thing? Mabey you should yell me how the tests are to make sure I did them right, the map, iac, tps, egr, o2, air chargetemp. And I still need to test the crankshaft sensor. And I cant find the camshaft senson mebey it doesnt have one.
On the tps w.O.T. Should be 4.5 to5voltz. But I got 1.37voltz.
Was the readings right foa the cold aire charg thing?

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Friday, June 22nd, 2012 AT 3:40 PM
Tiny
RACEFAN966
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Oh the TPS should be.8 to 1 volt throttle closed key on engine off, then go steady and consistantly with no drops in voltage to 4.5 to 5 volt at wide open, again key on engine off. The air charge temp sensor sounds good. Now if you would ohm the injectors they should be 8-12 ohms. Simply unplug and ohm injector.

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Saturday, June 23rd, 2012 AT 2:03 PM
Tiny
BART KOSKI
  • MEMBER

Ok that will take me some time ill start after work. Im testing them unpluged?

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Saturday, June 23rd, 2012 AT 11:03 PM
Tiny
RACEFAN966
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Yes that is correct just unplug and ohm.

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Sunday, June 24th, 2012 AT 3:10 AM
Tiny
BART KOSKI
  • MEMBER

I think I slill need to test the cranckshaft sensor

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Sunday, June 24th, 2012 AT 5:04 AM
Tiny
PCMENTOR29
  • MEMBER

I had a malfunctioning TPS on my Geo. Someone before me had crimped the TPS wires together instead of soldering them. With a little moisture they were shorting off and on. Worth looking at the condition of the tps wires.

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Sunday, June 24th, 2012 AT 6:56 AM
Tiny
BART KOSKI
  • MEMBER

That wasent so bad. Depending on the cyclender it had 12.1 to 12.3
with the meator set on 200, and before I started I put the two leads together and got.04 so I guess my reading are.04 less?
What should they be.
With the plenom off I noticed a lot of build up I guess you would call it, it looked oilydirty inside the throught and inside the plemen and the EGR tube had about 1/16 of carben buildup is that normal?
Should I test the crankshaft sensor, if so how and what should be?

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Sunday, June 24th, 2012 AT 8:22 AM
Tiny
BART KOSKI
  • MEMBER

Ohya 8to12
i think I should test the tps again, I had the car running. Ops

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Sunday, June 24th, 2012 AT 8:32 AM
Tiny
BART KOSKI
  • MEMBER

Finaly got it back togather cleaned as much of that carbon crap as I could, new gaskets and before I started on it I went to the junk yard got the detent cable and all the sensors could, havent put them on, but I have them if I need.
Well it started and ill test drive tommarow. But it always seems fine after I do something to it.
So if you could go over the crankshaft sensor test and anything else you can think of I would be greatfull.

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Monday, June 25th, 2012 AT 9:19 AM

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