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Now she runs, but lumpy


mk2davis
Junior Member
398/2000


Galant VR-4 org Post #: 1244878 posted 12/13/18 04:12 PM     Remind Me!  Send Private Message   Edit Post      
I may post a short video on YouTube so you all have a better sense of what is happening. As the title states, she runs, but it seems lumpy to me. I set the idle to 900 per vfaq instructions, grounding out the number 10 pin inside the cabin and the timing lead. Also set the timing to 5 degrees by only grounding out the timing lead. Is there something else that needs to adjusted? The motor is a new build. After a couple hundred miles, I'll drain the oil, and then it's off to CA smog.

The old fuel was drained, anda new fuel filter was installed.

Posts: 64 | From: Ventura, CA | Member Since: 03/01/15 | IP: (2605:e000:634a:2) | Report this post to a Moderator

Eztoril
Junior Member
1450/2000


Galant VR-4 org Post #: 1244879 posted 12/13/18 05:42 PM     Remind Me!  Send Private Message   Edit Post      
Did you wait till the cooling fans turned on then off? Setting timing needs to be done at operating temperature. I've only used the grounding connector under the hood to set base timing. Have I been doing it wrong lol?



91 GVR4 1450/2000
2.3 Stroker
HKS cams
FP 3052
Spal puller
EVO MAF 3"intake
EVO8 560 injectors
EVO8 ECU tephramod v7
Walbro 255
FRH intake mani
EVO3 exhaust mani
44mm tial wg
EVO3 tranny



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mk2davis
Junior Member
398/2000


Galant VR-4 org Post #: 1244881 posted 12/13/18 06:05 PM     Remind Me!  Send Private Message   Edit Post      
I did wait for the cooling fans to cycle. And you were right for base timing, grounding the two leads is only for setting idle speed.

As this point, I'm going to take the throttle body apart and look at what disaster awaits. Today she resumed doing what she used to do before I redid a few electrical connections. She starts, idles like poopoo at 500rpm, and then stalls. If you give it gas, rpms bounce up, then slowly go down even if throttle pedal is stationary, and then bounce up once throttle pedal is released. This happens for the first 20ish seconds. Then everything is normal.

Posts: 64 | From: Ventura, CA | Member Since: 03/01/15 | IP: (2605:e000:634a:2) | Report this post to a Moderator

mk2davis
Junior Member
398/2000


Galant VR-4 org Post #: 1244885 posted 12/14/18 11:53 AM     Remind Me!  Send Private Message   Edit Post      
Turns out one of the cells was bad on the ISC. I tested pins 1 and 2, 2 and 3, 4 and 5, 5 and 6. 1 and 2 was open, the other 3 had 28-30 ohms. If any one knows of an inexpensive place to find these, I'd appreciate the info. So far in my cursory search, they are about 400 and up.

Now the FIAV... I was dumb and disassembled and then tested it. The depth to the little plunger was:
1.27"in 90 C water
1.46" at room temp
1.44" in 0 C water

Does this seem appropriate, and any tricks to set this in it's range? If I tested before disassembling, an I'd be better off. If I don't get any ideas, I'll close this valve and connect the coolant lines as stock.

It's a process, and I am making progress. So there is that. Finding stuff wrong is better than not. TIA for your help.

Posts: 64 | From: Ventura, CA | Member Since: 03/01/15 | IP: (2605:e000:634a:2) | Report this post to a Moderator

luis84one
Member
652/2000


Galant VR-4 org Post #: 1244895 posted 12/14/18 08:44 PM     Remind Me!  Send Private Message   Edit Post      
do the fiav bypass mod. i would search the junkyards or online for a used isc

Posts: 125 | From: lynwood, ca | Member Since: 08/19/09 | IP: (2606:6000:658f:9) | Report this post to a Moderator

mk2davis
Junior Member
398/2000


Galant VR-4 org Post #: 1244897 posted 12/14/18 10:33 PM     Remind Me!  Send Private Message   Edit Post      
I did the FIAV mod, although I haven't pressed on the plug yet. I got a ISC from orielly, so that should be good to go.

Unless someone waves me off, things are going back together tomorrow

Posts: 64 | From: Ventura, CA | Member Since: 03/01/15 | IP: (2605:e000:634a:2) | Report this post to a Moderator

mk2davis
Junior Member
398/2000


Galant VR-4 org Post #: 1244902 posted 12/15/18 05:57 PM     Remind Me!  Send Private Message   Edit Post      
Got everything back together, and grounded out the two plugs to set the BISS. Idle was rock solid at 800 rpm. But when I disconnect the grounds, it shoots up to 2k, and eventually settles to about 1600.

Ideas?

Posts: 64 | From: Ventura, CA | Member Since: 03/01/15 | IP: (2605:e000:634a:2) | Report this post to a Moderator

ktmrider
Cool Guy Crowd


Galant VR-4 org Post #: 1244906 posted 12/16/18 11:36 AM     Remind Me!  Send Private Message   Edit Post   
The ECU driver circuits are bad. Most likely it burned up the new ISC too.

Lots of info on checking your ECU operation including required component checks and replacements.



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

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