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894x4 halfton electrionic box SMEC
#1704214
11/28/14 05:21 AM
11/28/14 05:21 AM
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Joined: Jul 2007
Posts: 271
Nevada Iowa
dodgepaul
OP
enthusiast
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OP
enthusiast
Joined: Jul 2007
Posts: 271
Nevada Iowa
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Anybody ever had much experience with the SMEC, brain box, on the 1989 dodge trucks? I have had the truck for years, it only gets driven sparingly at best but somehow she just keeps going and going. My 89 is the TPI fuel inj and a 4 speed. Last month she wouldn't start. she spins but no fuel nor spark. If I hot wire the fuel pump at the auto shutdown relay the pump works fine but still no start, I tested that relay as the book says and all checked out fine. So on to the no spark issue? Best I can tell the brain box tells the ignition when to turn on. So I figure lets try a new brain since it also tells the auto shutdown when and when not to work, I think anyways, I looked up online after hours to find what a process it would be to get a new one and found oriellys offers a bunch of rebuilt boxes. But the "OE #" they list with their options doesn't match mine at all. not even close, my box shows 4638251. 89 dodge half ton 360 TPI 4speed manual. oriellys has a couple boxes for that application but the numbers don't match. I assume the tunes will be different, so I hate to buy the wrong box, which I also assume will not be returnable once plugged in? any ideas on which way to proceed from here??? I'll try dodge in the am, but can already here the parts guy whining about my antique truck...........
1970 4spd Superbird, '69 Charger 500 Daytona clone,2015 Hellcat 6-spd B-5 Blue,1968 572 Hemi Charger,70 GTX 535 6-pac 4 spd,69 GTX 440 4-speed Super Trac Pac Car, 1973 383 Barracuda, and a couple Cummins
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Re: 894x4 halfton electrionic box SMEC
[Re: dodgepaul]
#1704215
11/28/14 08:08 AM
11/28/14 08:08 AM
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Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
BDS871Cuda
top fuel
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top fuel
Joined: Feb 2006
Posts: 1,949
land of 10,000______'s
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my 1990 had the same issue with no spark, didn't
have time to chase the problem, so I had a shop
check it out. My was a part in the distributor.
Snap your neck, mega G-force launch, is all I want!
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Re: 894x4 halfton electrionic box SMEC
[Re: dodgepaul]
#1704217
11/28/14 10:25 AM
11/28/14 10:25 AM
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Joined: Jun 2003
Posts: 21,457
It's a dry heat
gtx6970
Too Many Posts
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Too Many Posts
Joined: Jun 2003
Posts: 21,457
It's a dry heat
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Been a while so bear with me .
When you turn the key on does the ASD and/or Fuel pump relay click on then back off? It should
But,,,,,Those trucks were notorius for dist pickup plates.
Sometimes if you just pull the coil lead back out of the dist cap just enough to ck for spark will create enough resistance to get the pickup to work ,,for a while.
Or,,,Tap on the side of the dist hsg ( lightly) sometimes that works.
Back then ECM problems were extremly rare
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