4g61t.org

Hi All,

I have a 91-94 ECU on a 89 Colt turbo harness with 91-94 type of TB with a new ISC from DSMISC that test OK!

My ECU driver IC107 blow again. My wiring is connect like this (diagram from 91-94 manual shop) :

58 Blue(L) wire to pin 1 ISC
59 Yellow wire to pin 3 ISC
67 White wire to pin 6 ISC
68 Black wire to pin 4 ISC

But if I check the diagram from a manual shop of 89 Colt turbo the wiring is as follow:

58 Blue(L) wire to pin 1 ISC
59 Yellow wire to pin 3 ISC
67 White wire to pin 4 ISC (Instead of 6)
68 Black wire to pin 6 ISC (Instead of 4)

So which of these manual tell the truth? How should I wire my harness?

Could someone tell me the color of the wire at the ecu harness for pin 58-59, 67-68?
And the color of wire at the ISC 1-3, 4-6? With the model/year of is harness?

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Colt92t: 12.71@107mph/ 1.8 60' on 22x8x15' slicks, 4g63t, 16g@15psi, FMIC, 3" TBE, K&N, EcmLink

More than likley your ISC motor on your throttlebody is blowing the ECU driver...

Change the ISC motor on the throttlebody

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Geoff
2013 Genesis 5.0 RSPEC
88 Mazda Turbo II- LSX7
89 2.0 Turbo Colt
13 Ducati 1199 Panigale

yea apparently it's like an infectious disease. The ISC will kill the ecu, and a ecu will kill an ISC; making it hard to tech issues.

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4g61t.org
4g61t.com

Your electronics on the 89 turbo colt are the same as a 1990 dsm, and the pins may have changed with 91+ models. The manual for the 89' should be correct.

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Good stuff - trucks bring it!

Ditch the isc with a full fiav blockoff plate and adjust idle with the bypass screw. I've never had a problem after doing the plate and no more coolant lines or idle issues due to the isc.

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Had a:
1991 Eagle Summit ES Hatchback - 4g15 12v 5spd
1991 Dodge Colt -4g15 12v 4spd
Have a:
1978 Oldsmobile Cutlass - 468BBO TH350
Round 3:
1990 Dodge Colt-4G63T 5spd

At what rpm did you set your idle?

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Colt92t: 12.71@107mph/ 1.8 60' on 22x8x15' slicks, 4g63t, 16g@15psi, FMIC, 3" TBE, K&N, EcmLink

For the warm season, I turn it down as far as it'll go before it stumbles, then add 100 rpm to it. Ends up around 7-800rpm for idle. When it gets cold out (winter), I crank it up to around 900-1000.

_________________
Had a:
1991 Eagle Summit ES Hatchback - 4g15 12v 5spd
1991 Dodge Colt -4g15 12v 4spd
Have a:
1978 Oldsmobile Cutlass - 468BBO TH350
Round 3:
1990 Dodge Colt-4G63T 5spd