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Rewire the Car


jmorri15
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Galant VR-4 org Post #: 1248627 posted 04/10/20 04:30 PM     Remind Me!  Send Private Message   Edit Post      
Tell me I am crazy or not,

So I keep fighting with old wiring and today when I started the car after cleaning the injectors and changing plugs I have a bunch of sensors that worked a few months ago and don't work now. The IAT, TPS and Coolant Temp sensors all now don't seem to be working correctly. I am considering pulling the engine and dash and completely going through the whole thing, I have deleted ABS and wouldn't mind removing the cruise control.

Oh on a semi related note has anyone separated off different parts of the harness to make it easier to troubleshoot later or would you keep it closeish to factory?

I am furloughed through at least the end of the month so I have more time then normal.
Rewire the Car
You may choose only one
Pull Everything and Rewire
Buy Replacement Harnesses
Trace and Fix Only Problems


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Edited by jmorri15 (04/10/20 10:23 PM)

Posts: 171 | From: Kemp, TX | Member Since: 07/11/09 | IP: (98.158.243.158) | Report this post to a Moderator

mk2davis
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Galant VR-4 org Post #: 1248657 posted 04/11/20 05:57 PM     Remind Me!  Send Private Message   Edit Post      
You can download the factory service manual in the how to and info archive. I'd start by troubleshooting the sensors themselves. If they check out, your have 6 wires to replace? If all else fails, try getting a harness from eBay or performancepartout.com .

Have you had your caps in the ECU tested/looked at/replaced? I have zero idea if it could be related, but it's suspicious that so many sensors went south simultaneously. Hopefully someone with more experience chimes in.

Unless you take really good notes or have a huge selection of wire to use, I find rewiring difficult to replicate all the color combinations. Unless you want to go to a standalone ECU.

Posts: 131 | From: Ventura, CA | Member Since: 03/01/15 | IP: (47.148.51.252) | Report this post to a Moderator

FlyingEagle Galant VR4.org Moderator
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Galant VR-4 org Post #: 1248679 posted 04/12/20 10:26 PM     Remind Me!  Send Private Message   Edit Post      
I suggest that if multiple sensors went down all at once, you either have very dirty connection points of contact and or you have a ground wire or shared wiring that never got hooked up.

Check out the wiring diagrams and see if there is any commonality that may not be plugged in or connected.

Look for green death in the terminals and corroded but not green connection points.

All the factory connectors are available from Sheridan Engineering and his supply to multiple big DSM suppliers. JNZTuning.net and multiple others should have some around or go direct.



C53A 1 of the ~1500


Edited by FlyingEagle (04/12/20 10:28 PM)

Posts: 1629 | From: THE Ottawa | Member Since: 03/05/05 | IP: (135.23.119.89) | Report this post to a Moderator

jmorri15
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424/1000


Galant VR-4 org Post #: 1248747 posted 04/17/20 03:01 PM     Remind Me!  Send Private Message   Edit Post      
I have so many documents I might be able to build the car from a pile of parts, lol. I keep checking on both Ebay and Performancepartout but I'm not super confident another 30 year old harness will not have issues as well. I am sending the ECU over to the ECM Tuning guys so they can look it over but visually looks fine. About a year ago I had a problem with my ITA sensor not reading and it turned out to be a loose pin on the ECU plug. I do not really want to completely replace the harness but I think everything need to be toned out and most of the connectors on the engine are trashed.



2016 Mazda6 GT
2014 Chevy Volt (Totaled)
2013 Buick Regal GS (Sold)
2003 Nissan Sentra SE-R Spec V (Sold)
1994 3000GT SL (Sold)
1995 3000GT SL (Sold)
1992 GVR4 424/1k
1998 Ford Escort (Sold)
1996 Ford F-150

Posts: 171 | From: Kemp, TX | Member Since: 07/11/09 | IP: (199.116.171.18) | Report this post to a Moderator

jmorri15
Member
424/1000


Galant VR-4 org Post #: 1248748 posted 04/17/20 03:05 PM     Remind Me!  Send Private Message   Edit Post   
I have the engine harness sitting in my garage now so I am going to clean everything and see if I can figure out where my problems are. I have messaged the guys over at Sheridan and I will be ordering the ECU and Engine Kits.



2016 Mazda6 GT
2014 Chevy Volt (Totaled)
2013 Buick Regal GS (Sold)
2003 Nissan Sentra SE-R Spec V (Sold)
1994 3000GT SL (Sold)
1995 3000GT SL (Sold)
1992 GVR4 424/1k
1998 Ford Escort (Sold)
1996 Ford F-150

Posts: 171 | From: Kemp, TX | Member Since: 07/11/09 | IP: (199.116.171.18) | Report this post to a Moderator


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