Question about 1987 Oldsmobile Delta 88

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Car stalls after running a few minutes. Can the catalytic converter cause this to happen?

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No, it cannot. Is your check engine light on? If yes, please have the car scanned for trouble codes and report them to us. Autozone and Advance, among other parts stores, offer free scans.

Posted on Sep 16, 2010


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Got a 1997 monte carlo and im having a problem with either the fuel pump or the catalytic converter as one or both are causing the car to stall at low speeds or when i stop and then takes about 20 min

You have a pressure port test on the fuel injector rails,when you stall out just cycle the key go to the test port and which is nothing but a tire valve looking,press in the shrader fuel should squirt out and just dribble out,if it dribble out you may need a fuel pump, now as for the catalytic convertor you would be complaining about no power.I beleve you dont have a plugged convertor, You are equipt with a map sensor on the under hood diagram follow the hose diagram and check to make sure this is plugged in.If anything I stating the ignition module as the culprit it is designed with a 3x reference signal,which is not calculating the proper engine speed,and it doesnt have to set a code

Mar 20, 2012 | Chevrolet Cars & Trucks

1 Answer

2002 ford escape red hot exhaust spudders and rpms drops to almost stall

Carol Ann,
Your catalytic converter is plugged up [restricted] This is causing the exhaust to get red hot and causing the reduction in power. You need to replace this part [$$$} The catalytic converter failed because you have been driving the car for months with the fuel mixture excessively rich.
You need to find and fix the cause of the rich mixture or your replacement catalytic converter will also fail in a few more months.

Dec 21, 2011 | 2002 Ford Escape

1 Answer

How do you know if your cat converter is going bad? Can you test for it?

There are two ways a converter can fail:
  • It can become clogged.
  • It can become poisoned.
There really is no "inspection port" for the consumer or mechanic to see an actual clog in a converter. Often, the only way to tell if a catalytic converter is malfunctioning (plugged) is to remove it and check the change in engine performance. When a clogged converter is suspected, some mechanics temporarily remove the O2 sensor from the exhaust pipe ahead of the catalytic converter and look for a change in performance.
A catalytic converter relies on receiving the proper mix of exhaust gases at the proper temperature. Any additives or malfunctions that cause the mixture or the temperature of the exhaust gases to change reduce the effectiveness and life of the catalytic converter. Leaded gasoline and the over-use of certain fuel additives can shorten the life of a catalytic converter.
A catalytic converter can also fail because of:
  • Bad exhaust valves on the engine
  • Fouled plugs causing unburned fuel to overheat the converter
­Sometimes you can tell that a converter is clogged because you don't go any faster when you push the gas pedal. Also, there usually is a noticeable drop in gas mileage associated with a clogged catalytic converter. A partially clogged converter often acts like an engine governor, limiting the actual RPMs to a fast idle. A totally clogged converter causes the engine to quit after a few minutes because of all the increased exhaust back pressure.
The catalytic converter, like the rest of the emissions system, typically has a warranty length that exceeds the term of the warranty for the rest of a typical U.S. automobile.
Here is a safety reminder: Do not park your car over tall grass or piles of dry leaves. Your car's perfectly running catalytic converter gets very hot -- enough to start fires! You can keep it running well by keeping the ignition system in top shape, to prevent any unburnt fuel from entering the catalytic converter.

Dec 11, 2010 | 1989 Dodge Dakota 2WD

1 Answer

I have a 96 Honda Civic HX. When I am at idle the car starts to shake and the rpms fall almost to zero. I took the car to a mechanic and was told that I need a new Catalytic Converter and the EGR ports...

Yes and No. The EGR can cause the car to idle rough and or stall. I am assumeing the check engine light was on and set code for EGR and Catalytic Converter. If the engine isn't running right it is possible the cat won't work right due to improper air fuel ratio that the EGR is causing. To do repair proper the EGR should be fixed then clear codes and see if the code for Catalytic Converter. There are other reasons that would your car to idle rough or stall I am just assuming that this mechanic got codes or tested the EGR right.

Nov 01, 2010 | 1996 Honda Civic

2 Answers

Can a catalytic converter cause your car to stall out, run sluggish up hills, misfire, and surge, cut in and out almost like you turn key off... Hello again everyone, I am back listing another question on...

It sure can. If the car can't breathe, it can't run. The backfiring can be caused by a pressure uncertainty. You did not hear this from me, but if you can run JUST the muffler, not the cat, AKA straightpiping, you will let your car breathe just a bit more. You might try this to see if it helps any at all. (I hope you do not live in Cali, as I suggest you not try this if you do.)

Mar 19, 2010 | 1996 Oldsmobile Achieva

1 Answer

Runs good for about a 200 mile week trek then

Others may not agree, It sounds to me like it could be a clogged catalytic converter. The converter may be overheating if it's clogged compounding the fact that metal expands when heated. Let it run for awhile at night and see if there's any glowing under the truck. Also check for tell tale signs of heat around the converter. Does the passenger's side floor get very warm to the touch? I may be oversimplifying it but I've seen it happen often.

Mar 02, 2010 | 2000 Chevrolet Silverado

1 Answer

Engine stalling in stop & go traffic

sound like to me you have a clogged catalytic converter

Apr 27, 2009 | 2001 Chevrolet Blazer

1 Answer

NO run

sounds like you have water frozen in your exhaust system (muffler) or your catalytic converter i plugged due to an over rich fuel mixture overheating the catalytic converter.

Dec 18, 2008 | 2002 Ford SVT Focus

2 Answers

1998 Hyundai Excel stalls when idling or low gear?

new sensors or reconditioned ones from a scrapyard,best bet is main dealer

Sep 29, 2008 | 1994 Hyundai Excel

1 Answer

I need a list of the EGR/Trouble codes for a 1994 Ford SHO Taurus

Sounds like the catalytic converter has gone bad. What happens is you car as you drive will lose power, smell like rotten eggs and stall out. The reason is, the cat. is plugged up and cannot let the exhaust out of the tail pipe like it should. The exhaust is staying in the engine causing it to stall out and loose pwer.

Jun 11, 2008 | 1994 Ford Taurus

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