Tpi Wiring Harness Diagram Chevy 350 TPI Wire Harness - Wiring - The ecm that got here in 1986-1989 tpi fbody's and vettes is a chain 1227165 (one hundred sixty five). The aldl information charge in this version can deliver diagnostic facts at 8192 baud. The (extended) facts movement of sixty four bytes cycles via every 62.5 milliseconds (16 consistent with 2d) at this baud fee. Ecm change - web page remaining up to date 990830 this assignment will element the stairs, parts, guidelines, techniques for upgrading a 1985 gm tpi engine manipulate module (ecm) to a later model, having several benefits over the older one. The ecm that came in my 1985 z28 camaro with the tpi motor (vin "f") is a sequence 1226870 (870) control unit (car pc). This version was used inside the 'eighty five f-body cars with tpi vehicles, corvettes, and some 2.8l v6 (vin "s" and vin "w") (*reference*) automobiles. One principal problem when tuning an eprom for this ecm is that the diagnostic information (aldl) is transmitted at only one hundred sixty baud!. This works out to approximately a 1.25 2d c program languageperiod among the 25 bytes of information. I've simplest been capable of get approximately 6 to eight records samples all through a quarter-mile dragstrip run which you can imagine does now not offer a whole lot remarks for tuning. (Sample statistics are at the lowest of the web page in pdf layout). The ecm is placed up and behind the sprint, at the passenger aspect of the automobile. (In the back of wherein a glove field could be in a older pre 80s automobile) the 'eighty five ecm has a huge module connected to it at the outside this is the burn off module called the "mas". This is replaced in the '86-'89 years with a couple of ordinary relays and logic contained in the ecm. The ecm conversion/improve includes 10 repinning's within the inventory 'eighty five ecm harness connector 2 splices's among wires in the '85 ecm harness connector 1 wire removal inside the '85 ecm harness connector 1 cord addition in the '85 ecm harness connector a 'one hundred sixty five ecm from a donor '86-'89 tpi fbody car 2 relays (and harness wiring) from a donor '86-'89 tpi fbody car (relay harness plugs may be ordered thru a gm dealer beneath p/n 12101922 for approximately $25 every. -- Way to kevin irving for this tip..) ? an eprom configured in your engine/trans/and so on.
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