Question about 1992 Buick LeSabre

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1992 b uick Lesabre 3.8 no rpm signal and has code 42 ,questio is where is ign control module located

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IGNITION MODULE IS UNDER THE SPARK PLUG COILS.

Posted on Nov 12, 2010

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The ignition control module, should be attached by the coil pack. On a 3800 V6 they are known for the coil pack's, to go bad and misfire or not start at all. These car's do not have distriubutors.

Posted on Nov 12, 2010

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1 Answer

Starts and runs good for15seconds then cuts off,Must wait to restart.


I have to ask? How long since a tune-up? Are there any applicable trouble codes?
As far as spark at the spark plugs, check the ignition module. Check voltage to ignition module with key on, pink wire with black tracer. If no voltage, check fuse circuit, fuse 6--20amp in relay center. Not only check the fuse, check the fuse circuit for voltage.
During cranking rpms, it is the ignition module that controls spark, but, it has to see rpm signal, which comes from crank sensor. At the moment, I can't be positive which component or exactly where the fault lies.
To reply, click on comment link.

Apr 12, 2016 | 1992 Buick LeSabre

2 Answers

I need the list of codes for a 1994 corolla


1.6 GLi COROLLA

DTC NUMBER TROUBLE AREA 12 clip_image001.gifRPM signal 13 clip_image002.gifclip_image002.gifRPM signal 14 IGN signal 16 ECT Signal 21 Oxygen sensor signal 22 Water temperature signal 24 Intake air temperature sensor 25 Air / Fuel ratio lean 31 Vacuum sensor signal 41 Throttle sensor 42 Vehicle speed sensor 43 Starter signal 52 Knock sensor 51 Switch COND

Sep 29, 2014 | 1994 Toyota Corolla

1 Answer

I get a code 42 after driving car for a while, but if i shut off car the service engine soon light goes out. i have change the ecm,the ignition module, and coil pack, still have the same code issue (code...


"Code 42" would indicate that the Electronic Spark Timing (EST) signal did not change when the ECM applied bypass voltage to the ignition module. Check for faulty connections, or a faulty ignition module.

Aug 02, 2011 | 1992 Buick LeSabre

1 Answer

I have a 1992 gmc sonoma 2 wd 4.3L throtle body i am getting the service engine soon light and I checked the codes and I get number 42- Electronic spark timing bypass circuit or EST circuit is grounded...


CODE 42 Trouble Code 42 indicates that there may be a malfunction in the Electronic Spark Timing (EST) system.
During cranking, the timing is controlled by the ignition module while the ECM monitors the engine speed. When the engine speed exceeds 400 RPM, the ECM sends a BYPASS signal to the ignition module which switches the timing to ECM control. The ECM calculates what the timing should be then "tells" the ignition module via the EST circuit.
An open or ground in the EST circuit will stall the engine and set a Code 42. The engine can be re-started but it will run on ignition module timing.
The conditions for setting this code are:
  • System in BYPASS mode but the ignition module is still controlling timing
    - or -
  • Engine speed > 600 RPM with no EST pulses (ECM controlled timing) going to the ignition module for 200 msec.


Typical causes for this code include:
1) BYPASS line is open or grounded
2) EST line is open or grounded
3) PROM or CALPACK not seated properly in the ECM
4) Poor connections between ignition module and ECM
5) Poor routing of EST harness and/or poor quality ignition wires (EMI induced electrical noise)
6) Faulty or incorrect ignition module
7) Faulty ECM


Thank you for using fixya and keep us posted

Oct 10, 2010 | 1992 GMC Sonoma

1 Answer

I have a computer code of 42. What does this


ignition control [ic] error check the wiring and connections on the ignition control module usually located on the passenger side of engine by crankshaft position sensor easier to access by removing tire

Feb 21, 2010 | 1992 Buick LeSabre

1 Answer

The lights will not turn off on my 1992 buick lesabre. Where is the headlight switch relay located? We tried all of the locations under the hood. Is it in the door?


There is no relay.... there is a "Lighting Control Module". Its above the fuse box. Its hard to tell you what to check, without a wiring diagram, but if you disconnect the headlight switch and they go out, I would guess that the switch is bad, if you disconnect the switch and the lights stay on, then I would say the module is bad. But I would get a wiring diagram and check fully before spending any money on a module.

Nov 19, 2009 | 1992 Buick LeSabre

1 Answer

My 1999 buick lesabre will not start. I have gasoline and the battery is good.


Hmm, do you have spark? fuel pressure must be between 30 - 40 psi test the ignition coils by connecting an ohmmeter between the coil towers ie 1and 4 with the key in the OFF position do the same with the others as well there are 3 coils all together...you should have readings between 5 an7 thousand ohms if so the secondary side of the coils are good, if there is no spark at all try an ignition module. this is under the 3 coils they sit on the ign module..You can also test and or replace the spark plug wires, if a wire is 10 inches long it should read 10,000 ohms or less.. No more than 1000 ohms per inch is the spec.. hope this helps good luck

Nov 05, 2009 | 1992 Buick LeSabre

2 Answers

1992 Buick LeSabre Custom....180K on the odometer...stalls at low speeds....sometimes at highway speeds without warning...error code 17 is popular...I have a 41 also but the magnet has been missing 2 years...


dont know what the code are w/out looking them up however i do know that is a common problem when ignition coils or 1 ign coil goes bad. or distributor shaft wears out, which i dont think 92 buicks have. your 92 buick should be ign. coils . ignition coils need tested at a auto part store.most are free test call them to make sure.

Jun 25, 2009 | 1993 Buick LeSabre

2 Answers

Mustang, 1992 2.3L dual point OBD 1 error codes problem


Have you checked for spark on all 8 plugs? Unplug the exhaust side coil pack and run the engine. Does it run on all 4 cylinders?

May 27, 2009 | 1992 Ford Mustang

1 Answer

Code 42 apears after service engine light came on igniton modular was replaced.now the light is still on and engine revs high.another code appears on scanner pertaining to the speedometer. runs a little...


BYPASS line is open or grounded

2) EST line is open or grounded

3) Poor connections between ignition module and ECM

4) Poor routing of EST harness and/or poor quality ignition wires (EMI induced electrical noise

5) Faulty or incorrect ignition module

6) Faulty ECM If the number 1228253 is on the ecm replace it they are trash. Why did you replace the Ign. module? What was wrong with it before? Reply

Apr 10, 2009 | 1989 Buick LeSabre

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