Re: Throttle hesitation diagnostics?
 

IM is worth it's weight in gold. Think about where it has to survive and what function it performs. Like a number f other systems on the LT-5, the IM is a
Co-processor to the ECM performing functions the base code didn't do.

Re: Throttle hesitation diagnostics?
 

I would follow chart A7 in FSM to check fuel system on pages 6e3-A-29 thru 31. Your work looks good so far.

Re: Throttle hesitation diagnostics?
 

Didn't you convert this car to an automatic? It is a good possibility the calibration needs more "accelerator pump shot".

Re: Throttle hesitation diagnostics?
 

Didn't you first pull the clip holding the injector onto the rail?

Re: Throttle hesitation diagnostics?
 

Those seals always come off- forget about it if you can't see it anymore. Just find any Bosch style injector on a junkyard car and pocket a few extras.

Re: Throttle hesitation diagnostics?
 

I noticed the hesitation when I got it... Wouldn't vac supply to the FPR do that anyway? Or just not enough?

And I've always pulled the injector & rail assembly (and re-installed) as a whole - LT1's anyway. Is it easier to remove the rails withOUT them in place?

Re: Throttle hesitation diagnostics?
 

Should I pull the IH's next? Or DIS?

Re: Throttle hesitation diagnostics?
 

Injector looms - will they come up off of the back of the IH's? How?

Or does each wire have to come out of the loom first?

Re: Throttle hesitation diagnostics?
 

Do not remove those clips from the injector wire harness (just push on them and they will release)...if you remove them just something more that can fall where you do not want it.

Re: Throttle hesitation diagnostics?
 

yes