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Does it have spark? And other questions...

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computer

Postby DIESELCHICK » Wed May 16, 2007 10:24 pm

What year did dodge start putting the computer (?brain??) in their trucks? When I get a 1st gen I don't want any computer parts in it!! Thanks!!
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Postby KTA » Thu May 17, 2007 8:46 am

1991 was the first year with a PCM computer. All 1 gen diesels had an ABS xomputer box/electronics, but it is easily disabled if desired.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Postby oldestof11 » Fri May 18, 2007 7:17 am

KTA, doesn't the computer just run the cruise control and the alternator output?
Jon
93 D250~ Mismatch of cheap parts, trying to look fast going slow
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Postby CAJUN 93 » Fri May 18, 2007 12:55 pm

the pcm uses sensor input to control the cruise, alternator,and a/c compressor. it also controls grid heaters and i think it supplies the voltage to the ksb and shutoff solenoid. i eventually plan to remove mine totally and rewire, but thats a ways off

daryl

p.s. the pcm no longer controls my alternator.
93 d350 5spd 3.54-bhaf,stg iv,banks intercooler,bosch185,16cm,pacbrake,4" straight exh,pump mods,366 spring,leece-neville alt.
hers- 93 d250 auto 3.54- pump mods only
ours- 93 w350 dually, auto, 3.54. stock for now
parts 93 d350 auto, 92 d250 auto.
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Postby KTA » Sat May 19, 2007 5:22 am

It also runs all you dash guages.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Postby 92 red cummins » Wed Jun 10, 2009 9:28 pm

just to let you know if you find a pcm hang on to it. just replaced mine 525 for the part :mad: :(
92 red 4x4 w250 dodge grille guard,KC lights,warn winch,hella fogs,advanced timing,k&n,
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Postby Ace » Wed Jun 10, 2009 10:24 pm

I just took mine out. It's pretty straightforward on the 91.5 w/o cruise.
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Postby Begle1 » Thu Jun 11, 2009 1:36 pm

Ace wrote:I just took mine out. It's pretty straightforward on the 91.5 w/o cruise.


What about gauges?
1990 D-250 Regular Cab: Tweaked injection pump, built transmission, a cataclysmic charlie foxtrot of electronics, the most intense street-ran water injection system in the country, and some more unique stuff.
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Postby Ace » Thu Jun 11, 2009 7:34 pm

As far as I can tell, the 91.5 PCM works cruise, OD, grids, KSB, and grounds the speedo. That's it. It's probably the exact same PCM as on the 92-3, they just hadn't yet got around to implementing the VR and whatever else like KTA mentions, gauges.
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