Gm Tbi Iac Wiring Diagram

A1 grn wht this wire is used to energize the fuel pump relay.

Gm tbi iac wiring diagram. Motormite 85112 gm 4 wire square iac plug. For the iac pins c5 and c6 are reversed on the 454 vs the sbc so swap. 1994 chevy c1500 changing out an iac intake air control valve service engine code 35 duration. And normal gm wiring color codes.

This is a basic tbi harness for all engines using ecm 1227747 and 1228746 type ecm many others can be used. The wiring diagram for the specific motor showed the wiring different. The car doesn t increase idle at startup or the normal idle increases. Typically technical support is limited to the customer with only a harness purchase due to the complexity of.

It actually will not start unless i crack the throttle. I m getting 52 ohms through a to b and c to d on the iac. Although just a small number of cars were equipped with tbi in 1987 this changed very rapidly in 1988 when it was introduced on the f bodies camaro and. Gm throttle body injection 1987 93 lo3 5 0l and lo5 5 7l engines.

For the connector 13 try. Tbi fuel injection conversion wiring using a gm tbi efi system. Consult a service manual or see below for any check engine light code definitions. Here s a list of the pins but they are also on the wiring diagrams above.

Starting from 265 00. For a gm tbi application to read the data or to check for stored codes. Motormite 85135 gm 4 wire inline iac plug. This page is dedicated to the owners of these vehicles equipped with gm s dual point fuel injection model 220 tbi.

You can use a late 80 s or early 90 s gm tbi definition. My 57 chevy with a 89 350 tbi is having an idle issue. I believe i tracted it down to the iac but need to confirm as it is a new iac valve. C iac idle air control c fuel pump relay c the two fuel injectors c and the spark timing.

If you have access to a scan tool use a hook up for a 1990 350 cu. Basic connections are standard but it is easy to customize one for your needs.