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@  buck531 : (30 April 2019 - 02:14 PM)

DOH

@  ejguillot : (22 April 2019 - 10:40 PM)

I haven't. Still on here occasionally, Facebook is the work of Satan. :P

@  marcleach75 : (08 April 2019 - 05:22 AM)

Has anyone had an issue with wobbling at around 20 to 35 mph?

@  Tobias05 : (06 March 2019 - 09:38 PM)

...trying to convince the wife not to throw a stock replacement system back on...

@  Tobias05 : (06 March 2019 - 09:38 PM)

... i think they have a house brand muffler now? Used to be a magnaflow...

@  Fast86GN : (04 March 2019 - 07:05 PM)

I don't think it would that loud probably depends on the mufflers used?

@  Tobias05 : (01 March 2019 - 03:31 PM)

ZZP 3IN SS Regal exhaust w/plog and DP too loud for a DD?

@  tpivette : (17 February 2019 - 01:03 AM)

Don't know where on the east coast you are, but there's one for sale on craigslist in south Jersey...https://southjersey.craigslist.org/cto/d/browns-mills-98-buick-regal-gs/6779489044.html

@  Frank : (15 February 2019 - 03:42 PM)

Hello everyone! Its been a long time!. Looking to get back into the game. Anyone have a GS on the east coast they wish to part with?

@  ejguillot : (14 February 2019 - 09:08 PM)

Still have a Regal GS project that has taken way too long to build, and it's nowhere near done.

@  ejguillot : (14 February 2019 - 09:08 PM)

Same here.

@  Tobias05 : (09 February 2019 - 04:20 PM)

Haven't been on in a while, hope everyone is doing well!

@  fastnysix : (05 February 2019 - 03:40 PM)

Yes, still here

@  tpivette : (04 February 2019 - 02:26 AM)

Showing some RegalGS love. Anyone still active and lurking?!?

@  marcleach75 : (03 January 2019 - 01:59 PM)

You too bubba.

@  fastnysix : (02 January 2019 - 01:29 PM)

Happy New Year

@  marcleach75 : (31 December 2018 - 03:21 PM)

Hello.

@  WildGS : (27 December 2018 - 05:53 PM)

hello people!

@  buck531 : (24 December 2018 - 04:11 AM)

uhhh sure?

@  shindaiwadealer : (23 December 2018 - 05:32 AM)

Emergency ??? Are Napa crank sensors good??


Photo
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Ignition Control Module (L67)


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6 replies to this topic

#1 iTurbo

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Posted 06 March 2019 - 03:45 PM

Hey all, I've been driving my brother's old '98 Buick Regal GS with 3800 S/C lately. Usually the car is dead nuts reliable, but it stalled at a light a few weeks ago. It still made good fuel pressure and would crank over, but no spark.

 

So, I tracked it down to a bad ignition control module and bought a new one on Rock Auto. It was Standard Motor Products replacement.

 

The car fired back up and seems to run normally (most times), except it has been hard starting ever since putting it in. It sounds like the ignition timing is way off or something. Yesterday it started up and was so low on power that it would barely drive at walking speed, and bog down even if you tried to rev it. I checked the codes with an OBDII scan tool, but it had none.

 

Right after that, it fired right up like nothing was wrong, but the hard starting persists. It started up easily before the old ICM died.

 

Any ideas? Are the aftermarket ICM replacements not as good as OEM or an ACDelco replacement?


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#2 Fast86GN

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Posted 06 March 2019 - 04:06 PM

I'm no expert here but maybe swap out Ignition coils? I know you said no service light but a misfire can happen without setting the light. Can you hook up a scanner and drive the vehicle and watch for misfires?


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#3 OhMyGS

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Posted 06 March 2019 - 05:21 PM

I was having trouble starting mine.  It would start but did not want to stay running.  I cleaned the IAC which helped but still not good.  Then I replaced it which fixed the problem.  One symptom I had was that it would start, but the throttle had to be held open to about 1500 RPM to stay running.  Once I let off the gas it would die.


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#4 iTurbo

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Posted 07 March 2019 - 07:19 PM

Thanks, and keep the ideas coming.

 

Still no codes. It is still very hard to start and most of the time takes a few tries. When it does finally start, everything seems fine and the car runs great. It sure feels like the timing (while cranking) is way off or something. I have a big 4" JMB fender-well intake on the car and it makes strange gasping/hiccup noises while it tries to fire over.

 

Is there some kind of relearn procedure when replacing an ICM, like there is with some cars and the crankshaft position sensor? I found a guy on eBay selling good used (OEM) ICMs, I'm tempted to get one and try that. It would be nice to have a spare for road trips anyway.

 

Fuel pressure looks great. A while back I had a hard starting issue that turned out to be a burned out fuel pump resistor. I got a new one (+ relocation kit), an aftermarket fuel pump relay harness, and a new Delphi fuel pump. All good there.


Edited by iTurbo, 07 March 2019 - 07:27 PM.

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#5 Fast86GN

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Posted 08 March 2019 - 01:57 AM

I don't know that I would change the ecm from a source that I don't know. Check with a dealer and do a relearn if u must.
You have good FP but have u tried changing the fuel filter? Have you monitored the FP while cranking?

The noise your hearing from the FWI is normal.

Edited by Fast86GN, 08 March 2019 - 01:58 AM.

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#6 iTurbo

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Posted 09 March 2019 - 12:15 AM

I did do the fuel filter along with the new Delphi pump and relay harness, but honestly that was a few years back, so I'll pick up a new one. I'll have to get some help to check fuel pressure while cranking.

 

I was looking at ZZP catalog and noticed their stock replacement and HP ignition coils are both out of stock. Hopefully they come back in stock soon, and I'll pick up a set of their 10.5mm wires too.

 

I've been looking online about crankshaft position sensor fail/symptoms regarding the 3800. I found a good webpage on how to test the cam/crank sensors and also the ICM. It looks like it could potentially be one of the two hall effect sensors in the CPS that failed (3x or 18x). Most people seem to have issues when the car is fully warmed up and then experience problems. Mine seems to be more an issue when it's cold.


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#7 Fast86GN

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Posted 09 March 2019 - 03:01 AM

You can check with www.intense-racing.com as well.  John is a great guy to deal with.


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