EFIDynoTuning Forum

The more it costs or the more it hurts, the faster you learn!!

Thanks for the info, I used to be the automatic guy at a Ford dealership, so it is fresh, with a few sonnax goodies and it has the sprag, not the diode.
Thanks again for the heads up though.

This is a bit of a shot in the dark, but you said you unplugged the coils on the cylinders that the fuel rail was pulled from. Is it possible the PCM is shutting down the drivers to those injectors due to the circuit failure codes that set for the disconnected coils? They will shut down when a catalyst damaging misfire is detected to protect the cats. Not sure what the strategy is for this, but it might explain the 5 pulses, then nothing. Definitely doesn't help with the no start though.
I agree with decipha, I think your issue is elsewhere. It doesn't really add up, it should fire at least a bit from the 5 pulses of fuel if there is spark and compression.
Pretty tough for a COP system to be out of time as well. make sure there is compression (in the ones you can access at least)
If the rail is still out, maybe reattempt your test with the coils plugged in.
Good luck

Again, I cant thank you enough for the info and the links, Ill get quarter horse ordered right away
Ill be in touch as soon as I get set up.
Cheers

Have you checked for plugged exhaust, (Melted cats)?
Not sure how rusty it is down there, but remove O2 sensors or drop the pipe at one manifold. and see if it will fire. If everything is too corroded to remove, you can throw a vacuum gauge on a manifold vac source and crank with the throttle closed. It should pull about 5"hg at around 200 RPM (normal cranking speed) if not, there is a good chance you have plugged exhaust. However dropping a pipe at the manifold is more reliable.

sorry, should have read19lb injectors (old hands)

The one I'm running on currently is LGA2 ( I'm running !9lb injectors at the moment, so I can move it around without flooding.
I do not have a quarterhorse, but in the small amount of research I've done since you asked , it looks like it may be the answer I've been looking for.
Something I will purchase for sure.
I didn't kill a lightning to build this thing so all I have is a drop in from ford (long story) complete from pan to throttle body, no MAF or intake tubing.
So all stock 2003 so far.
I am running it on the intake pipes and MAF from the donor truck (2001 Navigator) I'll get a real MAF and fab a cold air pipe once I know what I need based on the software. I'd like to keep it as close to stock as I can.
I can't thank you enough for the help

Thank you so much, I will dig right into that!
HEC is the instrument cluster, I am running that at the moment as I don't have an aftermarket tuner that speaks old ford and had to get around PATs. Do you recommend one?
Thank you again for your time, it is greatly appreciated!

Hi all, sorry if this ends up long, I'm new to posting. I am currently resto-modding my 79 Bronco with an 03 Lightning powertrain. I have everything together and it will run, but I do not have the correct PCM. (I'm running it with one from an N/A 5.4 to move it around during the build. I can't find a PCM anywhere except FS1 for over 3 grand! And I can't go there! (OLD GUY PRIDE)
I can't load a stock Lightning tune as the hardware code in the PCM's are different. (I have an IDS, so I can write a factory tune if I can find a PCM with the correct hardware code. (MPC-206)
1st question - does anyone know if there is a cross reference chart that shows PCM hardware codes by VIN or truck build. (The PCM I need (MPC-206) comes in a few models, I just can't find a way to look it up. There aren't a lot of lightnings left out there.
My backup (and less desirable) plan is to tune the N/A Pcm to run the lighting 5.4. I will lose some functionality doing this. Not the end of the world, but...

I was discussing it in the lightning forum in corral.net and It was suggested that I try here.
P\S I'm running a 4r100 auto and an auto T\case, all 03 ford vintage. I'm going for a certain ambiance with the build, so I have built/modified a factory harness to run everything. I'm running the factory HEC, GEM and PCM.
I am not a tuning guru, I'm actually pretty new to this world, I was a drivability\electronics specialist at a FORD dealer and I teach automotive apprenticeship at a TECH institute currently, so most of my experience is based on relatively stock and factory tools and service info.
Sorry for going on and on.
Any help would be greatly appreciated.