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Old 01-09-2011, 05:56 PM   #1
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Default 1990 Where's the ECM?

it's not above the gas pedal, I've looked everywhere. where is it?

It's not the little gold box, and there's nothing next to it except 2 weatherpacks running to a plastic dust cover.
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Old 01-09-2011, 06:46 PM   #2
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Should be on, driver side mounted behind kick panel
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Old 01-09-2011, 07:47 PM   #3
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Originally Posted by 91xltlariat View Post
Should be on, driver side mounted behind kick panel
You have to access it from the driver side firewall behind the front tire. It slides out of the firewall towards the tire.

remove the plastic fender liner, and pull that sucker out after removing the clip, and retaining bolts/nuts.

It is technically behind the aluminum steering column mount on the far driver side, not the kick panel.

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Old 01-10-2011, 01:53 AM   #4
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thanks guys, got the ecm pulled, and I think I found my problem

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Old 01-10-2011, 02:58 AM   #5
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I would surely agree young squire
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Old 01-10-2011, 06:35 AM   #6
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yep...that is surely a problem.
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Old 01-10-2011, 07:10 AM   #7
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Don’t know if that is the problem, but that’s definitely a problem
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Old 01-21-2013, 08:28 PM   #8
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Here is a good one. After taking my ECM out and taking it to the parts store, I find out the ECM is a high altitude model! So a pickup that was sold in Texas was fitted with a High Altitude ECM...no wonder the pickup has never run right!

Replacement is on its way.
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Old 01-22-2013, 09:13 AM   #9
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Originally Posted by autocar View Post
Here is a good one. After taking my ECM out and taking it to the parts store, I find out the ECM is a high altitude model! So a pickup that was sold in Texas was fitted with a High Altitude ECM...no wonder the pickup has never run right!

Replacement is on its way.
...might want to double check that if you haven't already, only the map sensor controls altitude on these older trucks
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Old 01-23-2013, 12:00 PM   #10
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Originally Posted by scars View Post
...might want to double check that if you haven't already, only the map sensor controls altitude on these older trucks
Well, that is the problem isn't it? They have the book and it is behind the desk! But even if it were the proper one I think it is toast anyway, I have pretty well eliminated any of the obvious problems and it has never changed anything. As I was driving home a few months ago and it just shut down on me, backfired and when it came back to life it ran perfectly! Next time, it fired up and went right back to refusing to idle and taking it a few minutes to clear the gas out of it. It is haunted...it has a demon.

I wish it were an older model without all that computer controlled stuff on it but I am sure that if it were working properly I would never give it a second thought!
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Old 01-23-2013, 12:00 PM
 
 
 
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