I have been chasing a huge miss since last fall. There is massive fuel being dumped (puddles on the garage floor) into the exhaust and it drowns out the spark. I verified this by putting new plugs in, firing up the car and the #8 comes out shiny and new (and wet) as well as the header tube being much colder then the rest. The fuel is drowning the spark out. So #8 it is.

I've switched the #8 injector to another hole and it didn't do anything. Still shiny new plug in #8. I am convinced it is the wiring but have gone through the harness and versafueler wiring and don't see anything cut or out of the ordinary. I'm running a versafuler and 72# injectors on a 95 TA btw.

The opti was just done last month so that should be OK.

What in the wiring would cause an injector to stick open. I am getting 11.55V from the pink wire on #8 and all the wires on the driver side for that matter. The ground wire looks fine. Is there another ground I'm missing??

Any ideas??
Thanks

 

I'm not getting any DTC codes either but I am seeing "Injector fault" under the (binary) status bit display with TTSdatamaster.

 

If the ground (signal) wire to the injector was grounded all the time, the injector would stay open.

[edit] Dude, you double posted...

https://www.camaroz28.com/forums/sho...d.php?t=701908

 

Yeah..I didn't know where I'd get the most looks.

Hmmm. I separated that wire out and all looks good.

 

Have you tested the wire with engine off to see if it in a grounded state?

 

How would I do that?? I hate wiring??

Another thing I just found, when the fuel pump is primed for the the 2 seconds when you turn the key on the pressure spikes to 48 or so then would settle to 39 or so showing the fuel rails are presurized. Now it bleeds back to zero.
If I disconnect the #8 injector it will hold the pressure. As soon as I plug the injector back in it bleeds down to 0 pressure.

 

That means the injector is leaking, if your sure the problem is at the #8 plug. If your pressure is bleeding out you have a leaky injector.

 

Trace the ground wire on the number 8 injector all the way back to the versafueler and check the splice of the wires that connect the versafueler to the pcm. It sounds like there has to be a issue with the ground wire being grounded to a ground and not through the unit as intended.

 

I switched 8 with 2 and put two new plugs in those cylinders. When I refired it was pouring gas again. The #8 plug came out shiney new and #2 was burnt black.

I will redo the switching again tomorrow. I could have picked up the wrong injector.

 

I did and it seems to have a good connection and solder with no cuts in the wire. I'll go over every inch of it tomorrow with a magnifying glass.

 

No, it means the injector is getting a constant signal to stay open. It's fine with the connector off.

The wire is grounded or the fueler is faulty.

 

I agree totally Shoe...and thank you so very much for all the work you do in maintaining your site. It has helped me countless times. Currently laid off..but when I do find a new job..I will definitely make a contribution.

Bob

 

Hook a test light from battery + to the side of the injector that the PCM grounds. See if it's getting a pulsing signal.

If it is, you may have a stuck open injector (gunked up)
If the test light stays solid on, you probably have a fried output transistor in the PCM, which might be easily fixable.

Easiest test is to swap in a different PCM and see if the problem is solved.
If your PCM appears to be ok, then that wire may be shorting to ground in the harness or something.

 

I just went out and went over the ground wire again. It looks good.
Is there any way to test that the wire is indeed grounded??

 

wooo double posting is fuuuuun! https://www.camaroz28.com/forums/sho...d.php?t=701908