Question about 1991 Oldsmobile Ninety Eight Regency

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Car stalls when driving, once at operating temp. Don't have clue

I replaced coil pack, ignition module, oxygen sensor,crankshaft position sensor, fuel filter and fuel pump. i'm stumped? Please help?

Posted by pgooden on

  • Anonymous May 11, 2010

    Can you give more information. Does it stall when idling or is the engine cutting out under load? Is the idling speed fluctuating?

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Could be pickup coil in distributor

Posted on Sep 02, 2009

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1 Answer

Where is the crank position sensor,the ignition module,and coil pack at on a 1998 Pontiac Montana transport


What size engine . 3.1 or 3.4 Has two crankshaft position sensors
Crankshaft Position (CKP) Sensor (24X)
RH side of engine at end of crankshaf, behind harmonic balencer
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Engine Controls Connector End Views
Crankshaft Position (CKP) Sensor (7X)
Lower rear of engine
Ignition Control (IC) Module
Top center rear of engine coils are on top of ICM - ignition control module .

Apr 05, 2017 | Pontiac Montana Cars & Trucks

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My 1989 pontiac grand prix keeps stalling once it is warmed up after about 15 minutes of idle.


No, not the oxygen sensor. A couple of things you need to make clear. What light flickers, then stays on? That can't be a sensor light, it would have to be the "check engine light" or an engine temperature light (for like when your cluster has no temperature gauge, but just the "red light").
At any rate, the sensor you changed is not the engine temp. sending unit for the instrument panel. I believe on your '89 there would be two sensors for temp. One is the CTS for the engine computer, and the other is a sending unit for the dash, probably a 1 wire connector. It could be at fault, but it wouldn't cause stalling, I do not think anyway.
If it stalls and won't restart until cooled, this is a symptom of loss of ignition (spark) caused by either a faulty coil, or faulty Ignition Control Module (the coil controller), or last a faulty Crank Position Sensor (this sensor used by computer to determine ignition spark timing). You could test if ignition is lost, by checking for spark right after the engine warms and then stalls. If you have no spark to a spark plug right after it stalls, this is the reason for stalling. Usually it is the crank sensor, rather than the ignition control module or an ignition coil. Your car has 3 coils anyway in a "coil pack", so if one coil went bad, you'd still have two good coils, but engine would only be firing on four of the six cylinders-could easily stall a car.
You should check for trouble codes whenever you have a problem. A code might have been set. Easy to check for codes on your car, just ask if you don't know how-only takes a jumper wire or even a paper clip works. good luck.

Jun 16, 2016 | 1989 Pontiac Grand Prix

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What does error codes 40 and 41 mean on my 1999 mitsubishi eclispe mean


11 Oxygen sensor fault.
12 Airflow sensor fault.
13 Intake air temp sensor fault.
14 Throttle position sensor (TPS) fault.
15 Idle speed control (ISC) motor position sensor fault.
21 Coolant temp sensor fault.
22 Crankshaft position (CKP) sesnor fault.
23 Camshaft position (CMP) sensor fault.
24 Vehicle speed sensor (VSS) fault.
25 Barometric (BARO) pressure sensor fault.
31 Knock sensor fault.
32 MAP sensor faulty.
36 Ignition timing adjustment signal fault.
39 Oxygen (O2) sensor fault.
41 Injector(s) fault
42 Fuel pump fault.
43 EGR fault.
44 Ignition coil (cylinders #1 & #4) fault.
52 Ignition coil (cylinders #2 & #5) fault.
53 Ignition coil (cylinders #3 & #6) fault.
55 Idle air control (IAC) valve position sensor fault.
59 Rear Oxygen (O2) sesnor fault.
61 Transaxle control module torque reduction signal fault.
62 Variable Induction control (VIC) valve position sensor fault.
71 Traction control (TC) vacuum valve solenoid fault.
72 Traction Control (TC) vent valve solenoid fault.

Sep 26, 2014 | 1999 Mitsubishi Eclipse

2 Answers

1998 ford escort zx2 car runs great till it reachs normal operating temp range then it misses like crazy. put in a new fuel pump that didnt help tried new coil pack that didnt help either its not over...


ignition module , that the coil packs sit on ,was the problem on my car. had the same symptoms .ran fine till it warmed up then it started missing like crazy

Nov 03, 2013 | 1998 Ford Escort

2 Answers

41 thrt val sol


P0041 Oxygen Sensor Signals Swapped Bank 1 Sensor 2/Bank 2 Sensor 2
looks like your wires and melted together or a rodent has chewed them

Feb 10, 2012 | Mitsubishi Montero Cars & Trucks

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I just bought a 99 cadillac deville about two weeks ago from a dealership. It's been driving like a dream since I got it, but it turned off on me suddenly yesterday. It actually turned off on me three...


Its possible that the ignition control module may be faulty,or the crankshaft position sensor.I would suggest that you try to replace the crankshaft sensor first.The crankshaft sensor is located in the front of the engine near the ac compressor.The ignition control module is located on the back of the engine mounted above the rear valve cover underneath the coil packs.

Feb 16, 2010 | 1999 Cadillac DeVille

1 Answer

Where is the most common electricalground problem


the ignition module,and the crankshaft position sensor are two common ones.the 3.8 litre in your car has three coil packs.the module that drives the coil packs is a common problem.
check that all connectors are clean and tight.
if the air flow meter on the air intake assembly is faulty,the car will shut down just after starting.
the idle air control valve could cause a very low idle and stalling.

the best thing to do is use a scan tool to check the systems,as an o2 sensor that is faulty could make the computer lean out too much and the car will stall.
defects will be stored as a trouble code or DTC.

Jan 12, 2010 | 1994 Oldsmobile Eighty Eight

1 Answer

1988 Oldsmobile Delta 88' car stalls out. Coil pack might need to be replaced


Check the spark on each plug wire with a calibrated spark tester.One can be bought at most parts stores.If two plug wires that are next to each other are bad then replace coil pack.There may also be a bad ignition module.Also check the crankshaft position sensor.

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1 Answer

Timing the cams and crank with a belt


  1. Note: Electronic Ignition engine timing is entirely controlled by the PCM. Electronic Ignition engine timing is NOT adjustable. Do not attempt to check base timing. You will receive false readings.

The CKP sensor is used to indicate crankshaft position and speed by sensing a missing tooth on a pulse wheel mounted to the crankshaft. The CMP sensor is used by the COP Integrated EI System to identify top dead center of compression of cylinder 1 to synchronize the firing of the individual coils.
  1. The PCM uses the CKP signal to calculate a spark target and then fires the coil pack(s) to that target shown in Figure 51. The PCM uses the CMP sensor not shown in Figure 51 on COP Integrated EI Systems to identify top dead center of compression of cylinder 1 to synchronize the firing of the individual coils.
  1. The coils and coil packs receive their signal from the PCM to fire at a calculated spark target. Each coil within the pack fires two spark plugs at the same time. The plugs are paired so that as one fires during the compression stroke the other fires during the exhaust stroke. The next time the coil is fired the situation is reversed. The COP system fires only one spark plug per coil and only on the compression stroke.

    The PCM acts as an electronic switch to ground in the coil primary circuit. When the switch is closed, battery positive voltage (B+) applied to the coil primary circuit builds a magnetic field around the primary coil. When the switch opens, the power is interrupted and the primary field collapses inducing the high voltage in the secondary coil windings and the spark plug is fired. A kickback voltage spike occurs when the primary field collapses. The PCM uses this voltage spike to generate an Ignition Diagnostic Monitor (IDM) signal. IDM communicates information by pulsewidth modulation in the PCM.
  1. The PCM processes the CKP signal and uses it to drive the tachometer as the Clean Tach Out (CTO) signal.

2.5L V6

The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by a pulse former within the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition timing is determined by the powertrain control module in response to engine operating conditions based on stored data tables or maps. Once ignition timing has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 5, cylinders 4 and 3 and cylinders 2 and 6) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This ensures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
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2.0L 4 cynder

The ignition system consists of an ignition coil, spark plug wires and spark plugs.
The crankshaft position sensor signal is the basis for ignition timing calculations. The alternating voltage signal from the crankshaft position sensor is digitized by the powertrain control module. This digitized signal is then used to position the closing time of the primary circuit of the ignition coil.
Ignition angle is determined by the powertrain control module in response to engine operating conditions. Once ignition angle has been determined, the powertrain control module interrupts the current to the primary circuit of the ignition coil thus triggering the ignition spark which is supplied to the cylinders through the spark plug wires and spark plugs.
The ignition coils are triggered by the powertrain control module in pairs (cylinders 1 and 4 and cylinders 3 and 2) sending one ignition spark to the firing cylinder and one ignition spark to the corresponding cylinder on the exhaust stroke. This make sures that any unburnt fuel residues remaining in the cylinder on the exhaust stroke are re - ignited to provide cleaner exhaust emissions.
------------------------------------------------------------------------------------
Integrated Electronic Ignition System The Integrated Electronic Ignition (EI) System consists of a crankshaft position (CKP) sensor, coil pack(s), connecting wiring, and PCM. The Coil On Plug (COP) Integrated EI System uses a separate coil for each spark plug and each coil is mounted directly onto the plug. The COP Integrated EI System eliminates the need for spark plug wires but does require input from the camshaft position (CMP) sensor.
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1 Answer

89 Chevy Corsica keeps stalling while driving


. Have it checked for a trouble code. It seems like a sensor problem. ( Idle position , crankshaft position, camshaft position sensors could be bad. Also the EGR valve could be bad. with a caode you can narrow it down a bit.

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