Help with 1958 Impala Gen4 LS Swap

[1gr8ate]

Guys, can you give me some input here, I've read and done everything the forum says as far as deleting vats all the key immobilizers with all the emissions stuff. Here's what I have gen4 5.3 799 heads 224/232 581/581 @112 cam shorty headers 09+ map sensor 09+4l65e 17 pin internal p/n safety switch 07 e38/t42 09+PSI standalone harness. My gut feeling is it has something to do with the updated map sensor but I've referenced it to a 09 5.3/4l60 230/230 cammed truck for map quantities. I'm over looking something. Attached the tune files ,58 tune 3.hpt58 stock tune.hptdillon elliots compare file.hpt

[5FDP]

What is the question?

What is the vehicle doing or not doing?

[1gr8ate]

No injector pulse no spark won't start. Has power to everything just no fire out of the coils or ground pulse to injector. No codes. Already made sure the ecm maintained 12 volts while cranking checked all grounds ohm the harness everything I could think of. Or read on here

[brandon6.0]

try disabling the starter fault check next to the vats delete and rewrite entire. see what that does. I had a l83 swap that did the same woudnt start. disabled the starter and clutch fired right up.

[1gr8ate]

Already disabled in the attached tune. I believe

[1gr8ate]

OK I see.. Still wont start.

[[email protected]]

all wiring reinspected ?

[1gr8ate]

All wires ohm'd great from connectors to ecm/tcm to fuse block. Could the ecm just not be excepting the vats patch? Is there another way to go about this?

[MMGT1]

Doesn't look disabled to me either. It's the only thing I see not allowing it to fire as far as the tune goes. This build has the proper crank sensor to tooth count, right? Spent 12 hours a few years back on a truck engine swap fire-up and the engine year was not what we thought it was; we had the wrong combo man! (Seller had lied to owner about the year of engine) Learned to look at that dam sensor every time now and check if its the gray or the black and cross reference that its the correct set up!

[1gr8ate]

I believe the sensor is black but I'll check again when I get off

[MMGT1]

If its black I think its wrong. It should be gray if its a 58 tooth. The Black, I believe, is for a 24 tooth wheel.

[1gr8ate]

Ok Thanks I'll check it for sure.

[1gr8ate]

It had the right one it was grey but I went ahead and changed it out cause it just made more sense while I was there. And another write entire and it fired for a very few seconds but that's more than I had before. Thanks guys!!

[1gr8ate]

Now it's giving me crank position sensor A circuit po335 and ideas why I just changed the sensor to a new one

[MMGT1]

Can you post the tune you just loaded to your PCM?

[1gr8ate]

Sure!

[brandon6.0]

try doing a crank relearn since u changed the sensor. it may help. Got good fuel pressure now that it cranks?

[brandon6.0]

o yea make sure u do a rewrite entire to fully disable all vats.

[1gr8ate]

Did the write entire can't do the crank relearn yet don't want to rev it to fuel cut off right yet.

[MMGT1]

If you wrote entire it should run. I may have some not so good news. This is why I hate these companies that make these harnesses. You need to check that harness. Make sure they didn't screw up the wiring to both the MAF and the MAP. I've been to Hell my friend over one of those aftermarket harnesses. They screwed me good by wiring the MAF and MAP wrong...smoked two MAFs in the process before figuring it out. Hope to Hell this isn't your situation, but now you have to check....yes, I saw you checked, but now you need to check pin outs and ends to rule it out completely.