350 Tbi Ecm Wiring Diagram

A1 grn wht this wire is used to energize the fuel pump relay. All chevrolet tbi s use a speed density fuel calibration using a map sensor much like the speed density tuned ports. They also use a tps mat cts and have a idle air control system.

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1227747 Ecm Diagram Page Electrical Diagram Diagram 1988 Chevy

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This is a basic tbi harness for all engines using ecm 1227747 and 1228746 type ecm many others can be used.

350 tbi ecm wiring diagram. Page of 1228746 ecm schematic. Starting from 265 00. Original wiring found in most passenger fans is the g series system systematic cleanup of the wiring should simplify everything to what s found. I jumped on ebay and starting bidding.

Gm tbi wiring gm truck throttle body injection 4 3 5 0 5 7 7 4 engines 1985 91 w o the 4l60 e or 4l80 e transmissions. Page of 16136965 ecm schematic. Ecm pinout image 2 ecm pinout image 3 ecm pinout image 4 ecm pinout image 5 ecm pinout image 6 ecm pinout image 7 complete 1990 van p series wire diagram complete 1990 van g series wire diagram note. Here s a list of the pins but they are also on the wiring diagrams above.

It included the tbi unit the intake manifold the ecm computer the distributor the wiring harness and most of the sensors. Blue c1 1996 1997 the 1996 97 pcm powertrain control module fuel injection computer on your 4 3l 5 0l or 5 7l engine has a total of 4 connectors. I downloaded several pinout charts and wiring diagrams and began studying every detail. Page of 1227747 ecm schematic.

We have tried to minimize any splices within the harness but as necessary any splices are woven or mechanically crimped and soldered then they are covered with dual wall heat shrink. Delphi connectors are standard on gm original wiring harnesses. Typically technical support is limited to the customer with only a harness purchase due to the complexity of. 1985 1992 throttle body injection tbi standard length harnesses are 54 from the back of the engine to the pcm connectors.

I ended up with a complete system from a 91 305 camaro for about 140. Our harness upgrades to the 1988 90 ck truck computer. Tbi wiring harness conversion. Basic connections are standard but it is easy to customize one for your needs.

Pin a comes from the ecm pin a1 and is used to apply 12v to the relay to turn it on. Warranties this harness is covered under warranty for the lifetime of the original owner against defects in workmanship within the wiring harness only not time or any damage in result of defective workmanship of the wiring. The service number 1227747 is also the better performing ecm for all applications of the tbi engine.