1991 Grand Am 3800 Swap - Page 4 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 12-19-2014, 10:48 AM   #31
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I'm still not sure how to go about running my gauges off of the '98 ECU, though. Is there a way to go about that, or would a different gauge cluster be a necessity?

If the HPT would work out, that'd be a great option, though. It'* still cheaper than buying a standalone TCU.
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Old 12-19-2014, 05:45 PM   #32
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You won't be able to run the gauges off of the ECM, that'* why I said you would need manual gauges from like autometer and make your own dash. You would need to add a check engine light and wire in the OBD2 diagnostic port so you could talk to the engine. As far as a speedo I think they make one that works off of GPS and doesn't need to be connected to the car.
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Old 12-19-2014, 09:52 PM   #33
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the problem, with the oem gauges for your GA or aftermarket ones is you need to find a place for the sender, normally the holes in these have a sender it needs for the pcm. thats where the ease of obd2 comes in. with a 25 dollar obd2 to bluetooth adapter and a 5 dollar app(torque) i can see speed, tach,etc, and setup a gauge in the dash mode for any of it, trans temp, slip, knock retard for tuning, whatever you want. and you can use your phone or a cheap android tablet, have seen a bunch from 50 bucks this time of year.
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Old 12-19-2014, 11:17 PM   #34
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HPTuners won't touch anything below 1997. And it won't do anything with gauges.
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Old 12-20-2014, 09:43 AM   #35
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ecm, wiring and everything will be 98
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Old 01-12-2015, 11:54 AM   #36
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Here is a engine swap company and pc programing company I think can help you.
They show lots of engine swaps on there pages
from a Fiero to a 1988 park ave with a supercharged eng trans swap.
To even tap shifter auto added out of a grandprix in to a Fiero
and lots of other eng trans swaps
Sinister Performance, LLC.
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Old 01-12-2015, 06:45 PM   #37
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I'm not really interested anymore. I got the Bonneville now and sold the Grand Am to my brother, but the Bonneville is a great car.
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Old 01-12-2015, 07:19 PM   #38
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the bonnie is better than a ga in about every way
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Old 01-12-2015, 11:03 PM   #39
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Are you going to swap a 3.1 into the Bonny?
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Old 01-14-2015, 03:28 PM   #40
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It really is, jwfirebird.. I didn't give it nearly enough credit before, but it'* a sweet car. I love it.
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