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84 K5 Blazer(350 tbi conversion in progress)
NP208 has been installed
84 K5 Blazer(350 tbi conversion in progress)
.... hitch is going on the K5 too... lol swapping as much as I can...lol
Last edited by caliphatman8123; 11-19-2012 at 10:39 AM.
84 K5 Blazer(350 tbi conversion in progress)
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Last edited by caliphatman8123; 11-19-2012 at 10:51 AM.
84 K5 Blazer(350 tbi conversion in progress)
When i converted my 83 i went with a standalone harness.it was really a bunch less work i think.the wiring diagrams
mark has here were a big help converting my harness.
Not sure how much help this will be, but I converted my K5 from carb to EFI (TPI) so pretty much the same steps.
Suburban is the same firewall except the minor changes based on year differences. First thing you need is an '88 Suburban wiring diagram. You MIGHT be able to figure all the stuff out yourself without it, but it's not going to be fun.
When I got my TPI harness and dumped the box on the ground, I almost cried. It was so overwhelming, all these plugs and wires with no idea where they went. After staring at it for a few days, and then comparing with the wiring manual, I got a pretty good handle on what went where, and now I could probably ID everything on the wiring harness if it was back in that pile. It just takes time.
Since you have the fuse panel, remove your dash pad and steering column. Replace the fuse panel. Don't cut wires, anything that doesn't have a connector, can be de-pinned at the termination end. It's unfortunate that it looks like you have a fair number of cut wires, depending on what they are for, prepare to splice. That means solder/heat shrink, no half-a$$ garbage like butt connectors or those crimp-tap pieces of junk.
On my truck I didn't have the hole in the firewall for the ECM wiring (was a diesel truck) so I opened up the heater wiring grommet, depinned each wire from the ECM connectors, and fed it through the hole. You can probably remove the CCC wiring and re-use that grommet. Again, don't cut anything. At least until you are CERTAIN you aren't using it (AIR is a good example IMO) Cutting things = cutting corners, and simply means you will either have unexplained/near impossible to diagnose problems later, or a random failure at the worst possible time.
BTW, being CCC, you MAY be able to use the '88 ECM holder in place of the CCC holder. GM had a few setups early on (ESC/EST, CCC, then TBI) in the trucks and not all of them mounted the same way, but my '85 had the mounting tabs for the ECM holder that TBI/TPI used.
Last edited by dyeager535; 11-21-2012 at 09:29 PM.
"Frankentruck" is a "1985" K5, TPI 350 '165/6E (Vortec Heads, SDPC2000 base, roller cam, headers), 32 Spline SM465, 205 w/VSS, 10b/14SF, 3.42's and 33" tires. Soon to be boxed frame, '87 sheetmetal, and TPI w/ '727
Just take your time, do not rush or plan to do it fast. It all looks overwhelming. Take one wire at a time! It will all come together.
1990 Chevy Suburban 5.7L Auto ECM 1227747 $42!
1998 Chevy Silverado 5.7L Vortec 0411 Swap to RoadRunner!
-= =-
Is there any difference in knock sensor? It showed 2 different ones for year of motor but only one for the year of Burban... and all 3 were different... help please... lol
84 K5 Blazer(350 tbi conversion in progress)
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