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Stalling when decelerating. I Need help


dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1062714 posted 04/16/12 05:26 PM     Remind Me!  Send Private Message   Edit Post      
Boost leak test done no leaks that I can hear . Idle control switch and pigtail checks out good. I changed the throttle shaft seals and did a fiav block off today. Car is worst than before It will start but won,t maintain the idle as it now cycles up and down constantly. I need your help.

Posts: 673 | From: orlando FL | Member Since: 02/02/08 | IP: (97.100.20.147) | Report this post to a Moderator

ktmrider
Cool Guy Crowd


Galant VR-4 org Post #: 1062733 posted 04/16/12 07:12 PM     Remind Me!  Send Private Message   Edit Post      
ISC check? Or just the Closed Throttle Switch?

Also what BOV/BPV configuration are you using?



Mike O.
#464/1000 - Sold
05 Legacy GT - slush box
#86/2000 - Sold ( again )

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1062747 posted 04/16/12 09:05 PM     Remind Me!  Send Private Message   Edit Post      
Installed new isc yesterday even though old one checked out within specs. Bov is recirculated (Dejon modded)

Posts: 673 | From: orlando FL | Member Since: 02/02/08 | IP: (97.100.20.147) | Report this post to a Moderator

turbowop
Hard Snarker
1051/2000



Galant VR-4 org Post #: 1062748 posted 04/16/12 09:10 PM     Remind Me!  Send Private Message   Edit Post      
Have you reset the BISS after doing all that other stuff?



-Mark

A face only a grocery shopper could love.
1051

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1062756 posted 04/16/12 09:48 PM     Remind Me!  Send Private Message   Edit Post      
^^You got me there I will reset it in the morning and post the results.

Posts: 673 | From: orlando FL | Member Since: 02/02/08 | IP: (97.100.20.147) | Report this post to a Moderator

dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1062880 posted 04/17/12 04:05 PM     Remind Me!  Send Private Message   Edit Post      
The car will not idle with the biss terminal grounded and the logger plugged in so I can't reset the biss. If I disconnect the ground and leave the logger connected the car idles. Note for some reason the coolant temp reading on the logger showed 158 degrees. (I am assuming celcius) while the gauge on the dash was in the midpoint. The car has a new radiator, temp sender and rad fan sensor . Before all of this the car sat for 5 months for a boat load of maintainence.


Edited by dmj (04/17/12 04:09 PM)

Posts: 673 | From: orlando FL | Member Since: 02/02/08 | IP: (97.100.20.147) | Report this post to a Moderator

beaner
Blew1 Guy Today


Galant VR-4 org Post #: 1062884 posted 04/17/12 04:33 PM     Remind Me!  Send Private Message   Edit Post      
Quote:


for some reason the coolant temp reading on the logger showed 158 degrees.



Bingo.

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mikus
weiterhin das Huhn f#$k
1994/2000


Galant VR-4 org Post #: 1062886 posted 04/17/12 04:51 PM     Remind Me!  Send Private Message   Edit Post      


Your temp gauge and temp sender are two different units. Image linked not hosted due to boat shenanigans.

Usually the problem is temp sender wiring broken and you'll read something like -40. Sounds like you have a failing sender based on the 158 reading. 158 C would be 316 F by the way

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1062890 posted 04/17/12 05:09 PM     Remind Me!  Send Private Message   Edit Post      
I just tried logging the temp. and now my logger took a crap. I have a fatal alert and it won't reset.I swear this car loves jack stand balling as soon as I fix one problem 3 new ones show up


Edited by dmj (04/17/12 05:12 PM)

Posts: 673 | From: orlando FL | Member Since: 02/02/08 | IP: (97.100.20.147) | Report this post to a Moderator

dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1063025 posted 04/18/12 01:41 PM     Remind Me!  Send Private Message   Edit Post      
Replaced the coolant temp sensor with oem unit and tested it before installation. Tested the voltage at the connector both within specs. But the car still stalls on deceleration. At this point I am going to remove the ECU and take a look at the board for any damage.

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vtecds1
linkfail
625/2000


Galant VR-4 org Post #: 1063070 posted 04/18/12 05:03 PM     Remind Me!  Send Private Message   Edit Post      
What other maintenance did you do with the car? Was it doing it before?

Check timing, TPS, check ecu(like mentioned), Idle switch and ground on the t-body. I was having the same problem for the past year and could not figure it out. Then I remembered that the needle in my speedometer was bouncing up and down. Messed around with the cable and speedo housing for a bit and finally solved my problem.



Avoiding danger is not cowardice. Courage without discretion is no good. Or you can just say Bahala!!!


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AWDPower
Member
739/1000


Galant VR-4 org Post #: 1063317 posted 04/19/12 10:57 PM     Remind Me!  Send Private Message   Edit Post      
Quote:

The car will not idle with the biss terminal grounded and the logger plugged in so I can't reset the biss.




If it won't idle with the biss terminal grounded, the biss screw may be closed too far. Open the biss screw most of the way, then ground the terminal. You will start with an idle that is too high and close the biss screw to work your way down.



Jason K.
739/1000

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jepherz Galant VR4.org Moderator
Too Clean
1881/2000
50/1000


Galant VR-4 org Post #: 1063445 posted 04/20/12 04:56 PM     Remind Me!  Send Private Message   Edit Post      
Yes, that hints that there is no more adjustment in the idle motor if the car can't idle on it's own. Remember that all the idle stepper motor is, is a pendulum essentially. When you ground the pin, the ecu sets the stepper motor in the middle of its throw. Then you set the biss screw to be at the ECU's target idle.



-Jeff
1881/2000
50/1000

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1063938 posted 04/23/12 04:49 PM     Remind Me!  Send Private Message   Edit Post      
Ok .so I tried the suggestion above backed out the Biss, grounded out the terminals and the idle is all over the place between 600- 1800 rpms. I slowly tried to turn in the biss screw to set the idle and it did not help so I
disconnected the ground and It idles on it's own at 850-950 rpms,but every few minutes it starts cycling up and down again.I drove the car about 55 miles today and fortunately it did not stall, the idle drops under 500 rpms when coming to a stop but recovers quickly and cycles up and down at least three times before settling to about 850 rpms.

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ktmrider
Cool Guy Crowd


Galant VR-4 org Post #: 1063961 posted 04/23/12 07:40 PM     Remind Me!  Send Private Message   Edit Post      
I've heard of ABS issues creating idle surge issues ( mostly high idle tho ). Is your ABS intact or disabled and if off how?



Mike O.
#464/1000 - Sold
05 Legacy GT - slush box
#86/2000 - Sold ( again )

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1065149 posted 04/30/12 07:57 PM     Remind Me!  Send Private Message   Edit Post      
Abs in good shape, no codes or lights. Pulled the Ecm today looks like there is acid on the board but I an not sure maybe someone can confirm from these pics





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s_firestone
Ctrl-Alt-Boost
918/1000


Galant VR-4 org Post #: 1065325 posted 05/02/12 12:03 AM     Remind Me!  Send Private Message   Edit Post      
Check your butterfly gap. Test the continuity of the CTPS again, they are notorious for sticking in one position (open or closed) when they go out. It also relies on the ground of the throttle body.



Stephen Firestone
1992 GVR4 #918 of 1K

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Terry Posten
Old Balls
425/1000


Galant VR-4 org Post #: 1065328 posted 05/02/12 12:19 AM     Remind Me!  Send Private Message   Edit Post      
That is not acid, it is flux. That board look pretty clean fom what I can tell from the pics you have.



1992 Galant VR4 click
2010 Outlander GT S-AWC Premium w/nav (wife daily)
2010 Jaguar XF Premium Luxury (my daily

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1065363 posted 05/02/12 07:39 AM     Remind Me!  Send Private Message   Edit Post      
That eliminates the ecu as the problem then.I am going to check the resistance of the wires from the ecu socket to the tps, iac,cas and the closed throttle switch. I will keep the post updated.

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1065368 posted 05/02/12 09:43 AM     Remind Me!  Send Private Message   Edit Post      
All wires ohmed out fine including the p/s pressure Switch. Later I will check the voltage @ The iac, cas and tps. If that checks out ok then I will replace the throttle body.

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Terry Posten
Old Balls
425/1000


Galant VR-4 org Post #: 1065377 posted 05/02/12 10:21 AM     Remind Me!  Send Private Message   Edit Post      
If you can, send the TB to www.throttlebodys.com .

Steve Monroe is the real deal, he is fast and his work is second to none. You will; be certain it is perfect when you get it back, right down to each sensor and even the FIAV.

You can drop my name if you want to.

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dmj
Rod Stewart
998/1000


Galant VR-4 org Post #: 1065378 posted 05/02/12 10:23 AM     Remind Me!  Send Private Message   Edit Post      
^^^ Thank you.

Posts: 673 | From: orlando FL | Member Since: 02/02/08 | IP: (97.100.20.147) | Report this post to a Moderator

dammitjim
Member +


Galant VR-4 org Post #: 1065379 posted 05/02/12 10:43 AM     Remind Me!  Send Private Message   Edit Post      
Does it stall when you push the clutch in?


Edited by dammitjim (05/02/12 10:43 AM)

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Terry Posten
Old Balls
425/1000


Galant VR-4 org Post #: 1065391 posted 05/02/12 11:40 AM     Remind Me!  Send Private Message   Edit Post      
^^^You better hope not^^^



1992 Galant VR4 click
2010 Outlander GT S-AWC Premium w/nav (wife daily)
2010 Jaguar XF Premium Luxury (my daily

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dammitjim
Member +


Galant VR-4 org Post #: 1065392 posted 05/02/12 11:43 AM     Remind Me!  Send Private Message   Edit Post   
Agreed, but someone should ask the question

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