Injectors...No pulse after code 59

[Injected1]

Syanara started last night after the no spark problem was fixed but on by spaying gas in the throttle body. I did the full code 59 setup and had the ecm wired to the "duel" then moved it to the "single and still no injector pulse. What do I do now?

By the way it's is a fully built 4.3, 215, vortec, trw, t70, 75#'s

 

[JSM]

Re: Injectors...No pulse after code 59

Can you connect to ALDL?

 

[Injected1]

Re: Injectors...No pulse after code 59

Yes, what do I need to look for?

 

[skwayb]

Re: Injectors...No pulse after code 59

Did you have this running before 59 or the injector wiring change? Since you can connect to the ALDL it sounds like the chip is good. Time to look at all the wiring, check the ecm voltage coming out for the injectors that you are even getting any sent to the injectors and then check the injector plugs themselves to see if there is voltage there. That is where I would start.

 

[JSM]

Re: Injectors...No pulse after code 59

harness should have 12v on 1 side with key on, ecm pulses the ground.

 

[WyoSyclone]

Re: Injectors...No pulse after code 59

Syanara started last night after the no spark problem was fixed but on by spaying gas in the throttle body. I did the full code 59 setup and had the ecm wired to the "duel" then moved it to the "single and still no injector pulse. What do I do now?

By the way it's is a fully built 4.3, 215, vortec, trw, t70, 75#'s

How was the 'no spark' problem fixed? That may give us some clues.

 

[Injected1]

Re: Injectors...No pulse after code 59

This is the little brother (the Electrical Engineer).

No Spark was fixed with an igniter unit (ignition control module or whatever Syclone guys call it).

Later today I am going to check for pulse at the ECU ground for the injectors. If I have pulse there I don't know what I am going to do or where I am going to go from there. But I am going to accuse my brother of having bad injectors. I will see what I can find with an O-scope and a test light .

 

[WyoSyclone]

Re: Injectors...No pulse after code 59

This is the little brother (the Electrical Engineer).

No Spark was fixed with an igniter unit (ignition control module or whatever Syclone guys call it).

Later today I am going to check for pulse at the ECU ground for the injectors. If I have pulse there I don't know what I am going to do or where I am going to go from there. But I am going to accuse my brother of having bad injectors. I will see what I can find with an O-scope and a test light .

There's a 2-pin connector there by the distributor, that if the plastic locking tab was broken or spread out, would prevent the injectors from firing.... look for a pink wire with black stripe and make sure things are OK at that connector....easy to disturb when working on the dizzy.

 

[Injected1]

Re: Injectors...No pulse after code 59

Thanks WYO I will check that make sure it's tight (I think they disconnected and reconnected it).

 

[WyoSyclone]

Re: Injectors...No pulse after code 59

Check both wires of the connected connector housing (through the connector) with an ohm-meter (engine/key off)... make sure there is no resistance.