The 15 Y/O Turbo M42 Build Thread (Now Holley EFI Terminator X Controlled)

[lambo]

I love the single color 92's!

[jntar]

Badass! Those Enkei's look like sex.

[Schnitzer318is]

Nice... big time congrats. Always feels good to solve an issue like that. I still remember pre-boost I had a helluva warm starting/running issue. Turned out to be that the wire in the loom was hooked up for no catalytic converter cars. LOL I just plugged it in during the engine swap thinking it was supposed to be plugged in. It is supposed to be unplugged if you have a cat. That took me almost a year to find.

Have you done anymore tuning on the car? I was looking at my tune and your req_fuel is not that far off mine. I think mine was 6.0 (calculated by TS req fuel calculator) or something like that. Was curious what you ended up with.

[greanthumb]

Congrats.

Gratuitous burnout pic?

[ccsdo5]

Awesome!! Glad to see it up and running well! This car is such a motivator for mine!

[LJ851]

Also I should add, cranking voltage is now correct @ 12v under starter load. Charging system is perfectly fine!!

Interesting. My first thought is that the POS CPS was signaling at the incorrect time (early) and putting a much higher load on the starter. Maybe.

[Dj Buttchug]

Wheels look sweet! Congrats on finding the issue.

Thanks!! :up:

Also I should add, cranking voltage is now correct @ 12v under starter load. Charging system is perfectly fine!!

[Lof8]

Wheels look sweet! Congrats on finding the issue.

[Dj Buttchug]

Boom!

Good job. I feel like there should be a sticky somewhere about non OE/OEM crank sensors. No one should be running one !

Thanks!!
I know Ive seen that thread somewhere here. I really thought a sensor costing near $100 would be sufficient.

NEGATIVE lol

Jolly good, literally pages of trouble shooting for a shit sensor.

Seriously. Such a waste of time and effort. I was constantly beating my head against a wall.

[TheTacoMan]

Jolly good, literally pages of trouble shooting for a shit sensor.

[LJ851]

Boom!

Good job. I feel like there should be a sticky somewhere about non OE/OEM crank sensors. No one should be running one !

[Dj Buttchug]

Awesome you solved the problem! That blows it was just a cps all along! VR sensors in general are very prone to noise/error which is why newer sustems use hall sensors.

Those 92s look pretty nice. 15"? What offset? A classic wheel!

dude ya. Finally figuring it out just puts me in a great mood. lol

Specs are 15x8 et20 205/50/15 Nitto Neo Gens

[wazzu70]

Awesome you solved the problem! That blows it was just a cps all along! VR sensors in general are very prone to noise/error which is why newer sustems use hall sensors.

Those 92s look pretty nice. 15"? What offset? A classic wheel!

[Dj Buttchug]

So i forgot to update my current status. Below is the culprit of all my headaches. Thank you guys for trying to help me out. I got so fed up with this start up issue I had to go back to basics.

5 minutes on a scope and BOOOM. Issue resolved!!!!


This crank sensor IS NOT OEM. I bought it off line and the little phucker cost like 80 bucks.... Come to find out its dropping signal during start up and randomly sending sparatic low signals. It also had a reputation to send signals with insane amounts of noise... it looked like aliens were taking over my oscilloscope. I got so tied up in thinking the cranking settings were off that I let it get the best of me.

lesson learned.
Put OEM sensor in and now it starts every time with less than 2 seconds of cranking. Smooth idle too, just a chit load better all around.

Now I can FINALLY move on.

Also 92s look ok i guess... gonna run em for a while. Gloss brilliant white PC. needs better pics, ill get some soon

[LJ851]

Sounds like you could be on to the reason you have low voltage after you crank.


They voltage while cranking is determined by battery condition, wiring/connection condition, and starter condition.

Once it fires the alternator has to reach a certain rpm to "turn on" and start charging. This is usually designed to be below idle speed so that it will charge instantly but it sounds like you may be spinning the alternator slower than it should be.

9V while cranking is low enough (too low) to cause issues with a fuel injection system. Some systems are more sensitive than others but once you reach the voltage level that is too low for your setup it will be very difficult to start and will run poorly.

You may have multiple issues going on at the same time.