ECM Mounting - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chris_mccomb · 06-01-2012, 11:37 PM

Does anyone have a picture of how the ECM mounts in an 86 1/2 ton?

I took mine out of my old cab, (which was in pretty rough shape) and put it into a cab off an 81 1/2 ton, I don't think those had ECMs. It's been a while since I took it out, so I don't remember how it mounts. I already sent the old cab for scrap.

Thanks.

rfmaster · 06-02-2012, 02:30 AM

Behind glove compartment, against bottom of the dash support plate. Sorry - no photo's

//RF

chris_mccomb · 03-24-2013, 08:57 PM

Thanks. There's supposed to be some kind of bracket, which isn't in this cab, so I'll have to rig something up.

rfmaster · 03-24-2013, 10:08 PM

The OE ECM bracket is made out heavy duty white looking plastic. I use epoxy to attach this bracket to the under-dash metal. So far epoxy held up just fine on several conversions, the oldest completed in '07.

//RF

Ski-me · 03-25-2013, 01:42 PM

I thought ECM's started in 87'....??

rfmaster · 03-25-2013, 01:56 PM

Quote:

Originally Posted by Ski-me

I thought ECM's started in 87'....??

CA certified emission trucks used ECM with CCC carbs since early 80's. The rest of the world (and US in general) was spared from this snake pit of vacuum hoses and wires and 'an abortion' of the emission control system. GM was forced to use CCC system in light duty trucks mandated by eco-nazi's at CARB in order to meet CA emission limits. IMHO, GM should have gone to true EFI in light duty trucks, but bean counters probably killed that idea!

background info on 'CCC'
http://www.autozone.com/autozone/rep...00c152801c8432

http://www.robertpowersmotorsports.com/CCC.html

//RF

Ski-me · 03-25-2013, 02:17 PM

Quote:

Originally Posted by rfmaster

CA certified emission trucks used ECM with CCC carbs since early 80's. The rest of the world (and US in general) was spared from this snake pit of vacuum hoses and wires and 'an abortion' of the emission control system. GM was forced to use CCC system in light duty trucks mandated by eco-nazi's at CARB in order to meet CA emission limits. IMHO, GM should have gone to true EFI in light duty trucks, but bean counters probably killed that idea!

background info on 'CCC'
http://www.autozone.com/autozone/rep...00c152801c8432

http://www.robertpowersmotorsports.com/CCC.html

//RF

I did not know that, thanks! Feel sorry for you guys. I'm sure they had all kinds of engine power robbing devices back then!

06-01-2012, 11:37 PM	#1
chris_mccomb Registered User Join Date: Apr 2011 Location: Arnprior, ON Posts: 4	ECM Mounting Does anyone have a picture of how the ECM mounts in an 86 1/2 ton? I took mine out of my old cab, (which was in pretty rough shape) and put it into a cab off an 81 1/2 ton, I don't think those had ECMs. It's been a while since I took it out, so I don't remember how it mounts. I already sent the old cab for scrap. Thanks.

06-02-2012, 02:30 AM	#2
rfmaster Registered User Join Date: Oct 2003 Location: OC CA Posts: 1,374	Re: ECM Mounting Behind glove compartment, against bottom of the dash support plate. Sorry - no photo's //RF __________________ "The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)

03-24-2013, 08:57 PM	#3
chris_mccomb Registered User Join Date: Apr 2011 Location: Arnprior, ON Posts: 4	Re: ECM Mounting Thanks. There's supposed to be some kind of bracket, which isn't in this cab, so I'll have to rig something up.

03-24-2013, 10:08 PM	#4
rfmaster Registered User Join Date: Oct 2003 Location: OC CA Posts: 1,374	Re: ECM Mounting The OE ECM bracket is made out heavy duty white looking plastic. I use epoxy to attach this bracket to the under-dash metal. So far epoxy held up just fine on several conversions, the oldest completed in '07. //RF __________________ "The Beast" 1975 Chevrolet C20 longbed 350/700R4! with 3inch body lift Dual Flowmasters Super 40's! TBI retrofit completed (2007-07-29) New 383CID (+030) 08-304-8 9.5:1CR x36,005 (2012-12-17)

03-25-2013, 01:42 PM	#5
Ski-me Registered User Join Date: May 2012 Location: Colo Springs, CO Posts: 870	Re: ECM Mounting I thought ECM's started in 87'....?? __________________ - Jeff 89' K5 Blazer, 2.5" lift, 35" tires 04' GMC Yukon XL, 3/4 ton, 8.1L



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