ECM Code Issue

[Mechrick]

I'm getting a 1.4-2.1V signal across the EEC relay

The PCM pins are 85/86 (coil) and 87/30.

Whet voltages do you get referenced to battery ground in the relay socket with key on/engine off?

 

[rusty ol ranger]

12V to the pump has been tested, but I'm not getting it through the relay. Not burning up pumps, the pump works perfectly fine when I put a 12V lead to the inertia switch. Inertia switch does pass voltage, I've tested all the leads and I'm getting continuity throughout the wiring harness to the pumps, both low and high pressure, right up to the fuel pump relay.

At this point, its either a broken ECM or a bad relay connector. Should be the only two options left.

To recap: with just my key, fuel pumps don't prime or run when engine is turning. When I connect 12V directly to the inertia switch, fuel pumps run. This indicates either a PCM or a connector issue, as I've replaced the relays. When fuel pumps run and engine is cranked, it doesn't fire. Could also be a spark issue with the distributor, but that could be a symptom of a failing ECU or a relay connector that doesn't pass voltage.

ah ok...i think i misread your post before i asked that.

 

[franklin2]

I'll check the distributor, but it doesn't prime the pump when the key is turned. In addition to that, I don't think the fuel injectors are opening, because when I have the pump manually hooked up, fuel just sprays out of it. I think the rail is completely pressurized and more fuel just can't fit.

There is something wrong here. Fuel should not spray out, even if the injectors do not open. Fix the obvious things first.