ok, i have a pretty pressing and serious problem. did a 6spd swap and car will not start. it will crank fine, but will only spark once. when the engine is initially turned over, it will spark once then will no longer spark.

Parts used:
6spd tranny
6spd ECU
6spd wiring harness
shifter, clutch and all that

Problems checked and are ok:
ground above CPS
immobilizer unit
Neutral safety switch and clutch safety switch

 

someone please help, sort of serious problem. any input is welcome

 

Just curious, has your car been sitting for ~ 5 months with the same problem re: the swap...?

 

uhhh......yeah pretty much. well not sitting it was still being messed with but yeah. any ideas?

 

And you've checked everything thoroughly that was suggested in your 2 other threads?

 

as far as ive been told. mathell at "the shop" is working on the car and says hes checked everything thoroughly. everything meaning wiring destinations. if anyone could even come up with why it might do that, regardless of whether i say its been checked or not, it would be great.

 

nobody knows anything?

 

You didn't mention the flywheel, make sure your ring gear is on there correctly. You can't get it wrong because of the bolt patter, but since you didn't mention, I'd have to bring it up. Ring gear's used to calculate rpms and timing stuff.

-Peter-

 

i guess ill have to ask him to check the wiring again. well see. this needs to get resolved soon and im getting REALLY anxious

 

dude...............you have an immobilizer problem.

Your new ECU requires a proceedure to "relearn" the ecu to the car.

Check your codes and you should find one that references what I am talking about.

 

that's what my money is on.

Even if your shop has done many reputable jobs (though you haven't said this, 99% of people will say my shop has done this that or the other) doesn't necessarily qualify them to know everything, such as an immobilizer problem.



Explain further please.

 

yeah i know, but i checked the security light and its not on, plus we had the dealer reprogram the immo twice. its mathel from "the shop" aka turbo95max, knows a lot of max's but ill admit not as much about 5.5's as 4th gens



the key is turned over so that the engine cranks. on the first revolution a coil will spark once, then nothing after that even as the engine continues to crank

 

would there be an immo code even if it passes the security light check?

 

Well you should've said that from the start...

best thing to do is check and eliminate the variable.

 

Pm travis, TurboS13Hatch on the org. He's done a couple sentra's swapping in the full vq35de with 6-speed trannies. I did hear him mentioning some technical stuff about those swaps. Maybe he can help.

-Peter-

 

anybody have an idea of what sensor could cause this?

 

Why dont you take GodFather's advice?

 

i am, have pmed turbos13 and im looking for someone with a datalogger, just hoping someone has a possible answer to check first.