Okay, so last week I had my Greddy Turbo kit installed and went to the tuner for a tune. The car kept running too rich and fouling 4 sets of plugs. The tuner noticed that no matter what changes he did to the fuel map the ECU would adjust and keep adding more fuel. After looking at the harness he noticed that it was wired wrong between the ECU and Greddy Emanage Ultimate and that the TPS wiring was messing things up. After it was fixed the car ran perfect for an untuned car and the tuning began. After a few pulls he couldn't get it past 6K RPMs because as soon as VTEC kicked in (yo) boost would jump from 8PSI to 20PSI. By this time it was late into the night and the tuner wasn't able to complete the tune. The tune was postponed until he was next available which was 3 days later. It turns out that there was a hole in the vacuum line to the waste gate. And on my way back to the tuner a coolant line busted. I looked at it and the line was so stretched that they had to use aluminum hose clamps to keep it on. After it was replaced I got the car on the dyno and began to tune it. Everything went perfectly. Car tuned and I drove it home.

This was on Tuesday. I drove it today to run some quick errands. On the way out everything was fine. I didn't push it hard, maybe only 2 or 3lbs of boost every once in a while and I didn't even past 6K RPMs. Got my errands done and on my way home it stalled out of the parking lot. I thought it was pretty weird and just started it and continued down the street to a stop light, stalled again. I looked at it and was confused. Started it and it idled perfectly, I continued down the road and came to another stop light. I clutch and shit to neutral to coast to a stop, RPMs dropped and stalled while rolling. I started it and it idled fine. I did this about 4 times before getting to my house and I even stalled in my driveway waiting for my garage door to open.

I pop the hood and noticed that the coolant was about a 1/4 inch from the MAX line so I fill it up. Checked the oil and it was plenty in there. The MAP was a little loose so I zip-tied it.

I read another post exhibiting the same issues indicating it was crankwalk. But the only difference was he had a stock car and I had just gotten a tune done. The test drive after the tune it had stalled a few times but I figured because the guy didn't know how to drive my car. After he got out and I drove, everything was fine. Drove it home and it was smooth and it's been sitting in my garage for a day until today when I had to do some stuff.

What can I do to verify if it is crankwalk or a bad tune?

 

I don't think your problem is either crankwalk or the tune. You should reset the ecu and let your car relearn idle. After all the changes you made and the tune, it really couldn't hurt. After I installed my greddy kit, I had the exact same problem (well the idle problem, not everthing else). I kept monkeying with stuff trying to fix the problem. I checked vac lines, map sensor, EMU harness, bov, tps, iacv, boost leaks, just anything really. In the end, I figured out I was just so eager to have the car on the road, I wasn't letting it learn idle properly. I was blipping the throttle and junk after resetting the ecu. After I reset it, started and let idle until fans turned on (with no throttle input from me what-so-ever), it was fine. Every once in a while if I jump in and go without letting it warm up a little (2 bars) it acts kinda funky but after it get a little heat in it, it's fine. Good luck , hope this helps.

 

What EMS are you using? I'm using the Greddy Emanage Ultimate. Won't resetting the ECU by unplugging the battery effect it?

 

No sir you are fine. The information is stored in the Emanage so it wont lose your tune.

 

Alright I'll give this a shot, thanks.

 

Perhaps it could be your intake air temp compensation? have you checked to ensure that the ecu is compensating fuel for changes in air temperature? just seems that at each instance it has stalled is when you have been moving slowly/stationary, so obviously your under bonnet temperatures will have had a big influence on the intake temperatures.

 

True. I know during the summer my car acted horrible. (greddy kit with emanage) It was tuned in the winter so therefore it acted like poo! It is acting so much better now that the weather has changed to what it was last year

 

I'd tell you to chat with Evan's Tuning if you lived close enough. Evan might be able to do a remote tune with you if not. It really just sounds like your tuner didn't know the Emanage well. Not many do.

 

how about u ditch the shitty emu

 

how bout before you make a statement you make sure you know what your talking about. The Emanage is a more then capable unit its just there arent alot of tuners proficient with it.