02-22-2006, 12:02 AM
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#1
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AF Newbie
Join Date: Feb 2006
Location: evansville, Indiana
Posts: 1
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92 S10 engine Swap 2.5 to 4.3 ?'s
I bought a 92 S10 and the 2.5 was practically gone and i replaced it with another 2.5. It to was knocking, So now I've bought a 91 Chevy astro complete with motor (4.3) and all. I'm looking for any info on the wiring and fuel injection matching up or if I have to cut and splice everything and pt a carb on it. My questions are all about the fuel injection and the computer wiring. what all has to be changed? Any info on this project would be greatly appreciated.
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02-22-2006, 05:04 AM
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#2
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,552
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
You'll need the following to move the 4.3 into your 2.5 s10
Engine
Engine harness for your year blazer and matching ECM
All associated sensors for that year
All accessories
Misc parts that are different from the astro and blazer (rad, coolant recover tank, stuff like that)
DRAC unit
__________________
 
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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02-22-2006, 11:49 PM
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#3
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AF Fanatic
Join Date: Oct 2004
Location: Muskegon, Michigan
Posts: 2,835
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
fuel pump, dont forget that bugger... DRAC unit?
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02-23-2006, 06:42 AM
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#4
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,552
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
Quote:
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Originally Posted by dmbrisket 51
fuel pump, dont forget that bugger... DRAC unit?
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The drac converts analog signals (such as signals from the VSS) to the ECM. Also it has rear gear ratio and tire size info built into the chip.
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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02-23-2006, 06:49 PM
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#5
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AF Fanatic
Join Date: Oct 2004
Location: Muskegon, Michigan
Posts: 2,835
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
ok, your talken the chip on the back of the cluster then right
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02-24-2006, 06:16 AM
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#6
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AF Enthusiast
Join Date: Jun 2003
Location: Pittsburgh, Pennsylvania
Posts: 3,552
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
Quote:
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Originally Posted by dmbrisket 51
ok, your talken the chip on the back of the cluster then right
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No, the DRAC is the box attached to the ECM
__________________
95 s10 Blazer, EGR Mod, ZQ8 Steering box mod, 99 Center console shifter mod and more... See everything at www.pghconsulting.net/teal
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04-03-2006, 02:51 PM
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#7
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AF Regular
Join Date: Jan 2005
Location: Dallas, Texas
Posts: 100
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
what about going the other way, I have a 91 4.3 liter v6 187k miles, I want to drop in a smaller moter to save on gas, it will be for my son, back and forth to college. Is there any motor that will fit that one? The one I have is burning oil, valves and rings are hosed.
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04-03-2006, 03:09 PM
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#8
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AF Fanatic
Join Date: Oct 2004
Location: Muskegon, Michigan
Posts: 2,835
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
to go down from a 4.3 to a 2.8 or 2.2, you would need those moters pcm, wiring, fuel pump, and accesories
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04-03-2006, 03:49 PM
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#9
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AF Regular
Join Date: Jan 2005
Location: Dallas, Texas
Posts: 100
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Re: 92 S10 engine Swap 2.5 to 4.3 ?'s
what about the tranny, 60 degree to a 90 degree?
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