A typical tbi pump pressure must be able to maintain 15 to 18 psi. How to test the gm distributor mounted ignition module.
Ignition Module Pinouts Third Generation F Body Message Boards
Tbi coil wiring diagram. Basic connections are standard but it is easy to customize one for your needs. Both relays are energized from the 12v ignition wire that used to go to the side of the coil. I have tested the electrical wiring and am able get the fuel pump to run through bypassing itsolved. There is no coil reaction for the fuel pump relay. This is a basic tbi harness for all engines using ecm 1227747 and 1228746 type ecm many others can be used. Black wire is the pickup coil ground.
Tbi wiring harness conversion. Starting from 26500. Hi i have an 87 s10 blazer l 4x4 and does not fixyathe 4x4 vacuum thread. Coil distributor first the big picture block diagram. This tutorial will help you test the ignition coil ignition module and the crankshaft position sensor pickup coil. Heres a list of the pins but they are also on the wiring diagrams above.
Gm hei 8 pin ignition module wiring diagram for tbi. Ignition system circuit diagram. A1 grnwht this wire is used to. The gm system expects a more modern coil as well one that is powered by 12v at all times versus the oem coil that needs 9v during regular running and 12v at start. Typically technical support is limited to the customer with only a harness purchase due to the complexity of. System their wiring connections and a possible source or two with part.
Since it is only used to turn the relays on there is less draw on the stock 30 year old scout wiring. The gray wire labeled fuel pump feed must be connected to the positive fuel pump power wire to energize the fuel pump. 2 thoughts on 1987 chevy s10 28 tbi wiring diagram. Generic tbi fuel injection block diagram acronyms individual components and their function schematic diagram. The components you will see on the left. You will need to supply 12 volt ignition power to the coil through the vehicle wiring.
The typical ignition system circuit diagram for the 1996 1999 43l 50l and 57l 1500 2500 3500 pick up and suburban can be found here.
Gallery of Tbi Coil Wiring Diagram
