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Occasional stall issue


Giediprime
Newbie


Galant VR-4 org Post #: 1251147 posted 08/20/21 01:30 AM     Remind Me!  Send Private Message   Edit Post      
Hey guys. I am a long time lurker, but new member and wanted to hear everyoneís opinion on an issue I am having. I have 1991 #940 that I have owned for a few years now. It is 100% stock and has about 50k miles. It has run flawlessly until recently as it has developed an occasional stalling issue. It typically happens after driving for 15-20 minutes and just stalls when idling and stalls immediately upon re-starting. Letting the car sit for awhile resolves the issue. It only happens one of ten times I drive it but it has become an issue as I donít trust it. I have searched the forum and it seems like it is an ECU issue. My local mechanic has given up so I am getting a bit desperate as I donít have a good mechanic to help diagnose the issue. As such, Iíd appreciate any thoughts on the diagnosis as well if anyone has any recommendations for a mechanic in the Phoenix area. Thanks in advance guys!!!



1991 - #940

Posts: 3 | From: Queen Creek AZ | Member Since: 08/18/21 | IP: (70.176.180.204) | Report this post to a Moderator

MellowVR4
5" too short
372/2000


Galant VR-4 org Post #: 1251148 posted 08/20/21 11:25 AM     Remind Me!  Send Private Message   Edit Post      
Yea sorta sounds like an ecu issue. If remove the plastic piece under the dash on the passenger side, closer to where your right foot sits when your sitting in the car. that's where the ecu is. With ot removing it see if you can get a rotten egg smell coming it. You could also remove it and remove the screws to remove the cover from it amd take a picture and post it to see if any of us can see any obvious damage.



89 RAIDER V6 5speed
90 GALANT GSX SOLD
91 372/2000 making it pretty again
91 578/2000 sold
92 417/1000 DIED
87 4RUNNER LS400 SWAP SOLD:(

Posts: 1661 | From: Milwaukee, Wi | Member Since: 07/25/09 | IP: (172.58.59.132) | Report this post to a Moderator

tyeler18
Member
736/2000


Galant VR-4 org Post #: 1251150 posted 08/20/21 05:50 PM     Remind Me!  Send Private Message   Edit Post      
Test for spark when it does it. Does the fuel pump prime while cranking when it's acting up? Majority of the time I see this happen on higher mileage cars it's the CAS. On a lower mileage car like yours I'd be looking at the ECU first. CAS is easy to swap and cheap though if you wanted to fire a parts cannon at it. Diagnostics would be best though.



736/2000- FP Red, buschur turbo back, Evo 8 ecu, FIC2150, modified 1g Mishimoto X-line, evo 9 JIC coilovers, Powerstop Z26 brakes, and a trunk full of groceries.

Posts: 103 | From: Casa Grande, AZ | Member Since: 07/16/12 | IP: (184.98.71.233) | Report this post to a Moderator

Giediprime
Newbie


Galant VR-4 org Post #: 1251220 posted 09/19/21 12:55 AM     Remind Me!  Send Private Message   Edit Post      



Here is a photo of the ECU. I donít see anything telling but please let me know if you do. Otherwise I was going to go with one of those eBay guys that rebuild these. $125 is a cheap fix if thatís what it ends up being. Thanks for any and all help!



1991 - #940

Posts: 3 | From: Queen Creek AZ | Member Since: 08/18/21 | IP: (70.176.180.204) | Report this post to a Moderator

FlyingEagle Galant VR4.org Moderator
Eager Beaver


Galant VR-4 org Post #: 1251225 posted 09/19/21 09:30 AM     Remind Me!  Send Private Message   Edit Post      
If the ECU needs a going over, you send it to ECMLink, not Ebay rebuilders.

They are the most trusted Mitsu ECU rebuilders in the USA, and they make ECMLink (formerly KA DSMLink).



C53A 1 of the ~1500

Posts: 1635 | From: THE Ottawa | Member Since: 03/05/05 | IP: (135.23.119.239) | Report this post to a Moderator

Giediprime
Newbie


Galant VR-4 org Post #: 1251232 posted 09/21/21 01:53 AM     Remind Me!  Send Private Message   Edit Post   
Thanks FlyingEagleÖI was hoping someone on this board knew a reputable company for this work. Will send it to them.



1991 - #940

Posts: 3 | From: Queen Creek AZ | Member Since: 08/18/21 | IP: (70.176.180.204) | Report this post to a Moderator


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