Question about 1991 Oldsmobile Cutlass Ciera

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Vehicle stalls out while driving and at idle..I have replaced all plugs and wires and fuel injector.we can not find where to plug in a diagnostic tool to find what the actual problem is. does anyone have any ideas?

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Could be a bad ECU. We are having a similar issue and the dash spedometer dies and them comes back on with the check engine lights and TEMP light then they seem fine. HTH.

Posted on Feb 24, 2010

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How do you fix an idleing problem on b2300 mazda truck?

What kind of idling problem ? An what year Mazda ? Idle is controlled by the engine computer via a IAC motor , idle air control valve or motor, what ever Mazda calls there set up ! Or if a fairly new vehicle, they use drive by wire or electronic throttle control . With the idle air control set up passages get plugged an don't allow enough air to by pass the throttle plate causing stalling problems . A vacuum leak can cause a ruff unstable idle an stalling also . A dirty throttle plate can cause idle problems as well ! A scan tool ,not a code reader is a very use full tool to check engine data parameters. With the scan tool you can view idle air control counts . To see if the engine computer is actually controlling the idle air control valve . Idle Air Control Valve

Also an engine misfire can cause idle problems , also clogged fuel injectors can as well . A good diagnostic technician would start with hooking up a professional grade scan tool , checking for DTC'S - diagnostic trouble codes , misfire data , engine sensor data , IAC counts ! Section 20 Idle Speed Controls lecture preview

Oct 02, 2015 | Mazda Cars & Trucks

1 Answer

My 2003 pontiac aztek shuts off when its in idle

Could have a vacuum leak , a problem with the IAC - idle air control motor !
Rough, Unstable, or Incorrect Idle and Stalling
DEFINITION: Engine runs unevenly at idle. If severe, the engine or vehicle may shake. Engine idle speed may vary in RPM. Either condition may be severe enough to stall the engine.
Refer to Diagnostic System Check - Engine Controls .

Refer to Intermittent Conditions before starting.

Search for bulletins.

Observe the owners driving habits.

Fuel System
Test the fuel system circuits for proper operation. Refer to Fuel Pump Electrical Circuit Diagnosis .

Test for low fuel pressure. Refer to Fuel System Diagnosis .

Test for faulty fuel injectors. Refer to Fuel Injector Balance Test with Special Tool , Fuel Injector Balance Test with Tech 2 , Fuel Injector Solenoid Coil Test test procedures.

Inspect for fuel contamination. Refer to Alcohol/Contaminants-in-Fuel Diagnosis .

Inspect for fuel in the pressure regulator vacuum hose.

Ensure each injector harness is connected to the correct injector/cylinder.

Inspect for any items which may cause an engine to run rich, long term fuel trim is significantly in the negative range. Refer to Diagnostic Aids for DTC P0172 .

Inspect for any items which may cause an engine to run lean, long term fuel trim is significantly in the positive range. Refer to Diagnostic Aids for DTC P0171 .

Test for conditions which cause an incorrect idle speed.

Throttle body tampering, excessive deposits, or damage--Refer to Fuel System Description .

Restricted air intake system

Large vacuum leak

Inspect the air intake ducts for being collapsed, damaged areas, looseness, improper installation, or leaking especially between the MAF sensor and the throttle body.

Inspect crankcase ventilation valve for proper operation.

Inspect the throttle position (TP) sensor and related wiring. Refer to DTC P0123 .

Monitor the 24X crank sensor and the CMP sensor signal present parameters on the scan tool. If both are not responding, test the sensor feed circuit. Both sensors use a separate feed circuit but are internally connected to power. Test all CKP sensor A and CMP sensor circuits for intermittents. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Monitor the 3X parameter on the scan tool. If the 3X is not responding, inspect the CKP sensor B and circuits for intermittents. Inspect the ignition control (IC) circuit, IC timing control circuit, low resolution engine speed signal circuit and the low reference circuit for intermittents. If these circuits become open, or shorted, they may not set a diagnostic trouble code (DTC) immediately, but are capable of causing driveability complaints. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test the exhaust gas recirculation (EGR) system for proper operation. Refer to Exhaust Gas Recirculation (EGR) System Description .

Inspect the Transaxle Range Switch input with the vehicle in drive and the gear selector in drive or overdrive

Ignition System
Inspect for proper ignition voltage output using the following steps:

Attach the J 26792 Spark Tester to engine ground.

Connect the spark plug end of the spark plug wire to the J 26792 . Leave the other end of the spark plug wire connected to the coil being tested.

Connect the spark plug end of the companion spark plug wire to ground. The companion spark plug wire is the wire attached to the corresponding coil tower.

Crank the engine while observing the J 26792 . A spark should be observed.

Repeat the above steps for each coil.

If spark is not present at the coils, inspect for the following conditions:

Coils--Cracks, carbon tracking/arcing, or a resistance value outside the specified range

Coil Resistance
5000-8000 ohms (5K-8K ohms)
Spark plug wires--Signs of arcing, cross firing, cracks, carbon tracking, plug boot damage, pinched, improper routing, or a resistance value outside the specified range

Spark Plug Wire Resistance
9 686 ohms per meter (3,000 ohms per foot)
Important: : Spraying the secondary ignition wires with a light mist of water may help locate an intermittent problem. Ignition voltage will arc to ground when a secondary component is faulty.

Defective ignition module

Ignition system wiring--Loose ignition module feed or ground connection, or damaged system wiring

Remove spark plugs and inspect for the following conditions:

Fouled plugs



Improper gap

Burned or damaged electrodes

Improper heat range or reach

If spark plugs are gas or oil fouled, the cause of the fouling must be determined before replacing the spark plugs. Refer to Spark Plug Inspection .

Sep 27, 2015 | Pontiac Cars & Trucks

1 Answer

Idles odd and seems like it wants to stall, but then when I put it in neutral its just fine. I've put in new plugs and wires and a new battery. I also ran some 'Gom-out fuel injector cleaner' through it...

4 main causes for rough idling as you describe:
  1. Bad MAF (Mass Air Flow) sensor (causes erratic idling)
  2. Bad EGR (Exhaust Gar Recirculation) valve
  3. Bad TPS (Throttle Position Sensor) often will stall when engine is warm and in drive but not moving ie at a Stop sign.
  4. Clogged fuel injector
Best cause of action would be to go to one of the major Auto Parts chain stores that provide free diagnostic tests. The results would lead you to which part(s) is(are) defective.

Mar 23, 2011 | 1999 Ford Escort

2 Answers

Car is stalling at idle

Several possible problems associated with stalling @ idle.
  • Bad PCV valve
  • Bad fuel filter
  • Bad TPS (throttle positioning sensor
Most chain auto parts stores will run a free diagnostic test for you. After getting the codes, it will be easier to narrow down your problem.

Feb 17, 2011 | 2006 Chevrolet Impala

3 Answers

#5 piston not working correctly.

you may need a new fuel injector. or a intake gasket. here is a tip ;with the engine running spray starting fluid or a carb cleaner around the intake at the #5 cylinder if there is any change in idle you need to replace the intake gasket if no change replace the fuel injector

Apr 05, 2010 | 2003 Buick Rendezvous

1 Answer

Car was running great. driving home all of a

Here are a couple of guesses for things to check: vacuum leak (low vacuum pressure), worn distributor cap or rotor, incorrect timing, clogged fuel injectors, malfunctioning fuel pump (low fuel pressure), ignition module on its way out. I hope these suggestions help you out.

Jan 09, 2010 | 1990 Oldsmobile Cutlass Ciera

1 Answer

The explorer stalls at idle. it's not running rough and it runs as long as the rpm's are above idle

Possible causes: dirty fuel injector; get a can of injector cleaner which you had to your fuel tank and run the vehicle for a few days.
Fouled spark plug(s); have plugs checked and replaced if needed.
Improper engine timing; Have engine timing, (the timing of each cylinder firing) by a qualified mechanic and have timimg adjusted if necessary.
If none of the above helps have a diagnostics run to determine cause.

Jan 02, 2010 | 2002 Ford Explorer

1 Answer

@002 Protge 5. Very low idle and kinda dies out when driving. Put new plugs in it and still the same? Sometimes stalls at stop lights?

REmove the idle control valve, clean and replace. Check plug wires, check fuel filter and fuel injectors.

Aug 19, 2009 | 2002 Mazda Protege

1 Answer

2004 Mazda 6 sputters but doesn't stall

change plugs wires also .fill gas tank up put prestone or gum out fuel injector car around several miles.give injector cleaner time to clean out injectors.wait until engine cool .change fuel filter.relief fuel pressure before changing fuel filter.

Apr 27, 2009 | 1992 Honda Accord

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