GalantVR4.org The Mitsubishi Galant VR-4 Forum
Galant VR-4 Forums » Galant VR-4 » Technical Discussions » New stumble on initial press of accelerator pedal (SOLVED)
Previous thread Next thread

New stumble on initial press of accelerator pedal (SOLVED)


thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246626 posted 07/18/19 08:19 PM     Remind Me!  Send Private Message   Edit Post      
Started my car the other day and found it is now stumbling on the initial press of the accelerator pedal. If I push it fast, it stumbles and leans out. If I press it slow, it is fine. I verified the TPS is reading correctly and it idles just fine. This started right after being started. I can't find a boost leak anywhere. I made a log and it can be seen HERE. I am stumped.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)


Edited by thomcasey (08/09/19 08:28 PM)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (99.41.236.89) | Report this post to a Moderator

cupajoe
Member +
1242/2000


Galant VR-4 org Post #: 1246627 posted 07/19/19 01:44 AM     Remind Me!  Send Private Message   Edit Post      
sd?



GVR4 1242/2000

Posts: 324 | From: Wasilla, Alaska | Member Since: 03/01/10 | IP: (66.223.164.124) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246628 posted 07/19/19 04:36 AM     Remind Me!  Send Private Message   Edit Post      
Yes. Went to SD last year.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

Dan D
220, 221... whatever it takes
410/2000


Galant VR-4 org Post #: 1246632 posted 07/20/19 08:07 AM     Remind Me!  Send Private Message   Edit Post      
Did this just start happening as our weather turned hellish?

Does it go away when the car's warmed up?

Or - did you fill it up at a BP station that used to be Rickers, now Get Go with typical shit Get-Go gas?



#410/2k

Posts: 1158 | From: Brownsburg, IN | Member Since: 02/27/01 | IP: (2601:805:c700:2e) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246633 posted 07/20/19 12:36 PM     Remind Me!  Send Private Message   Edit Post      
Holy crap!! It started 2 weeks ago and gets worse with it being warm. It is very possible that I put gas in it at the former rickers / new getgo station on 56th on Lawrence. I never thought about it being the gas.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

Dan D
220, 221... whatever it takes
410/2000


Galant VR-4 org Post #: 1246634 posted 07/20/19 12:41 PM     Remind Me!  Send Private Message   Edit Post      
I haven't put any in the galant but I did in the CTS-V before I realized they had switched. It was not a happy car! Idle was wandering, knock retard was problematic, and I got horrible gas mileage that tank. (ok...11.2 vs 12.5... it's always horrible but worse than normal horrible)

If it's not that, then I'd be testing whatever IAT sensor your using for your SD setup.



#410/2k

Posts: 1158 | From: Brownsburg, IN | Member Since: 02/27/01 | IP: (2601:805:c700:2e) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246635 posted 07/20/19 01:36 PM     Remind Me!  Send Private Message   Edit Post      
I have a go IAT. When I log (the link to the log is on the first post) it reads 40 all the time for some reason. It is connected with the ECMTuning kit and has always read that way, but a bad gas does sound very plausible.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

Dan D
220, 221... whatever it takes
410/2000


Galant VR-4 org Post #: 1246641 posted 07/20/19 07:30 PM     Remind Me!  Send Private Message   Edit Post      
I think with ecmlink you can adjust setting to basically let you run with a simulated iat. You can probably play around with that and rule out the sensor if you don't otherwise have diagnostic/test equipment at your disposal to test it off the car.

Otherwise screw Get Go for taking away my favorite gas 😬



#410/2k

Posts: 1158 | From: Brownsburg, IN | Member Since: 02/27/01 | IP: (2601:805:c700:2e) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246652 posted 07/21/19 07:51 PM     Remind Me!  Send Private Message   Edit Post      
I verifies that I filled up with Shell the last time so gas should be good. I just ordered another sensor since it is reading 40 degrees VA the normal 70 to start. Only $12 for a fast sensor



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

cupajoe
Member +
1242/2000


Galant VR-4 org Post #: 1246653 posted 07/21/19 08:21 PM     Remind Me!  Send Private Message   Edit Post      
For the time being while you wait for a new sensor go into the MISC tab and check lock IAT, it'll lock at 77*. See if the issue goes away.



GVR4 1242/2000

Posts: 324 | From: Wasilla, Alaska | Member Since: 03/01/10 | IP: (66.223.164.124) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246655 posted 07/22/19 08:26 AM     Remind Me!  Send Private Message   Edit Post      
IAT setting does not exist on the MISC tab.


Found a setting on the ECU Inputs tab. I locked it:


Even locked, IAT shows -40 and problem persists.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (99.41.236.89) | Report this post to a Moderator

diambo4life
Member
476/2000


Galant VR-4 org Post #: 1246665 posted 07/22/19 09:49 PM     Remind Me!  Send Private Message   Edit Post      
Add more fuel to those cells where it's stumbling and see whether the issue lessens or gets worse.



1990 GSX: New project..
1991 Belize Green GVR4 #476/2000: 710WHP/501TQ (dynojet)in 2014, Street trim, 3400lbs! [email protected] (wastegate)
91 Talon: [email protected] (quickest) [email protected] (fastest) 3200lbs, 17" street tires in 2009 (sold.)

Posts: 240 | From: Edmond, OK. USA. | Member Since: 07/07/13 | IP: (2600:8803:9000:5) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246668 posted 07/23/19 08:50 AM     Remind Me!  Send Private Message   Edit Post      
I would have to change everything below 3500RPM, not really willing to do that when I know I have a sensor that is reading -39/40, which indicates a bad sensor per GM. At least when I get the sensor I will know for sure it is good and adjust from there.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246710 posted 07/25/19 01:45 PM     Remind Me!  Send Private Message   Edit Post      
Changed out the IAT sensor and the ECU still see's -40 for intake temp. Would a shorted wire cause this? I am using the ECMTuning plug and play kit to a 2g MAF plug (Car had a 2gMAF plug there already, so I bought the complete wiring kit from ECMTuning for that plug). I have no problem checking the connections to the plug itself, but I just can't find much information on what would cause an issue like this, where the IAT is seeing high voltage to throw it to -40.

I found this post on Tuners, but there is no resolution. -40 IAT



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)


Edited by thomcasey (07/25/19 02:14 PM)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (99.41.236.89) | Report this post to a Moderator

transparentdsm
I have to say something dumb Member
138/2000


152/1000


Galant VR-4 org Post #: 1246715 posted 07/25/19 06:21 PM     Remind Me!  Send Private Message   Edit Post      
Are you sure the 2g maf harness is wired in correctly? I'd check all the wiring for the maf.



138/2000
152/1000

Posts: 3546 | From: Klamath Falls, Or | Member Since: 07/27/11 | IP: (71.89.204.234) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246716 posted 07/25/19 06:52 PM     Remind Me!  Send Private Message   Edit Post      
Well, it has been working for several months, at least until a few weeks ago. Maybe one of the connections broke.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246719 posted 07/26/19 09:52 AM     Remind Me!  Send Private Message   Edit Post      
Ohmed out the connections and they were good. Went ahead and cut the connector and direct wired, still seeing the issue. Next to verify it is getting all the way to pin 8 or if the IAT section of the ECU is bad. I have a fresh ecu to install if needed.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (99.41.236.89) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246721 posted 07/26/19 12:26 PM     Remind Me!  Send Private Message   Edit Post      
All wiring tested good. I even swapped the ECU for a fresh repaired one from ECMTuning, still seeing the -40 in the logs. I can disconnect the sensor without the car noticing or anything. Is there a setting I can set to put the IAT @ 70/77 vs the -40?



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (99.41.236.89) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246730 posted 07/27/19 11:32 AM     Remind Me!  Send Private Message   Edit Post      
I zeroed out SDTempWeighting to disable IAT with SD and still have the same issue. Here is a video showing what it does when I stab the gas. HESITATION



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

transparentdsm
I have to say something dumb Member
138/2000


152/1000


Galant VR-4 org Post #: 1246732 posted 07/27/19 11:47 AM     Remind Me!  Send Private Message   Edit Post      
so i finally had some free time to check out your log. try disabling the airflow smoothing w/ SD operation in the MISC. tab, its the one thing i can see.

edit: im not sure this is going to do anything to help or hinder you and probably wont change anything with your IAT's, but it is something i noticed.



138/2000
152/1000


Edited by transparentdsm (07/27/19 11:53 AM)

Posts: 3546 | From: Klamath Falls, Or | Member Since: 07/27/11 | IP: (71.89.204.234) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246734 posted 07/27/19 12:09 PM     Remind Me!  Send Private Message   Edit Post      
Thank you. I will do that and report my findings. I have also obtained a test TB just in case something is cracked with mine post plate.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:387:b:3::44) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246736 posted 07/27/19 04:11 PM     Remind Me!  Send Private Message   Edit Post      
That didn't change anything. Plugs were covered in soot. Cleaned and gapped them. No real change. Problems are all below 3k rpm. Maybe timing? I suppose I could check Monday evening



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246758 posted 07/29/19 02:33 PM     Remind Me!  Send Private Message   Edit Post      
I went ahead and swapped out the TB for the once from my son's motor and the problem seems to be gone. So, something on my TB is leaking bad, even though it didn't present on the Boost Leak check. I ordered a used TB from PerformancePartout and will send it out to be cleaned and rebuilt when I receive it.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator

iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 1246768 posted 07/30/19 07:41 AM     Remind Me!  Send Private Message   Edit Post      
Curious. That's good news.



91 VR4 855 Nile Black
92 VR4 828 Belize Green-SOLD
91 VR4 115 Nile Black -SOLD

Posts: 10688 | From: Michigan | Member Since: 03/05/01 | IP: (205.144.100.200) | Report this post to a Moderator

thomcasey
I ain't no puny human
866/1000


Galant VR-4 org Post #: 1246769 posted 07/30/19 08:30 AM     Remind Me!  Send Private Message   Edit Post   
Yes, it is very curious. There is a FAIV Bypass plate installed, with a new seal. And it was working fine for about a week before I started seeing the issues. I am thinking maybe a crack developed from the bypass installation (primarily breaking the factory FIAV screws loose) and allowed the extra air to enter the system. I am installing a new ISC in the replacement TB today and then using link to adjust the idle/BISS to be sure everything is actually good.



Thom
866/1000 (PTE 1200's, billet 20g+, DSMLink v3, eagle/ross, .020 over, 272's, GC/AGX Coilovers)

Posts: 860 | From: Indianapolis, IN | Member Since: 09/24/14 | IP: (2600:1700:6c83:0) | Report this post to a Moderator


Pages: 1 | 2
Previous thread Next thread

Extra information
1 registered and 11 anonymous users are browsing this forum.

Galant VR4.org Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker, iceman69510, pot, FlyingEagle 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 765

Rate this thread


News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement GalantVR-4.org

Generated in 0.268 seconds in which 0.226 seconds were spent on a total of 14 queries. Turbo powered.


Hertz's Galant VR-4 Page