New Software, Up-Rev, now car won't start when Hot!!!

pokeyl · 07-16-2023, 12:43 PM

New software. I now have all the VVEL and other stuff that I did not need. Imported the old tune, you have to hand jam all the timing, That Sucked!! Now the car starts good and runs good but will not cold but when the water temp is over 100F.

Any idea what table to start in?

If i touch the throttle it will start.

The car is a 2010 with a GTM stage 2 SC kit. The reason I upgraded software was new computer old one died!!!

fryzia23 · 07-16-2023, 01:23 PM

It’s in the tune. Too much fuel is dumped during hot starts and that’s why you need to add pedal input to add more air to get it started. Had same issue when went to 1050 injectors. Changed to ecutek as per tuner recommendations. Supposedly has more precise injector control. I’m Running same gtm stage 2 supercharger.

pokeyl · 07-16-2023, 04:32 PM

Updated my tables based on some old tune data, and it worked!!!!

But the Tach now shows 2000 at idle, So I re-flashed again and now I am back to NO Start hot.

I may call ECUtek tomorrow. Any idea on how to get a base tune???

pokeyl · 07-20-2023, 07:39 AM

Changed injectors, looked at some other stuff. Car starts fine cold. On restart (hot) I now have a Bank 1 rich code.

Ordered Up-stream O2, and will look at grounds today. MAF shows good.

Elmo370z · 09-07-2023, 07:43 PM

Why are you still
On uprev

07-16-2023, 12:43 PM	#1 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 896 Drives: ??? Rep Power: 55	New Software, Up-Rev, now car won't start when Hot!!! New software. I now have all the VVEL and other stuff that I did not need. Imported the old tune, you have to hand jam all the timing, That Sucked!! Now the car starts good and runs good but will not cold but when the water temp is over 100F. Any idea what table to start in? If i touch the throttle it will start. The car is a 2010 with a GTM stage 2 SC kit. The reason I upgraded software was new computer old one died!!! __________________ It's not my fault I'm old, I was born a very long time ago!

07-16-2023, 04:32 PM	#3 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 896 Drives: ??? Rep Power: 55	Updated my tables based on some old tune data, and it worked!!!! But the Tach now shows 2000 at idle, So I re-flashed again and now I am back to NO Start hot. I may call ECUtek tomorrow. Any idea on how to get a base tune??? __________________ It's not my fault I'm old, I was born a very long time ago!

07-20-2023, 07:39 AM	#4 (permalink)
pokeyl Track Member Join Date: Nov 2010 Location: DFS Posts: 896 Drives: ??? Rep Power: 55	Changed injectors, looked at some other stuff. Car starts fine cold. On restart (hot) I now have a Bank 1 rich code. Ordered Up-stream O2, and will look at grounds today. MAF shows good. __________________ It's not my fault I'm old, I was born a very long time ago!

09-07-2023, 07:43 PM	#5 (permalink)
Elmo370z A True Z Fanatic Join Date: Apr 2013 Location: st. petersburg Posts: 5,709 Drives: 09 nissan 370z Sp M6 Rep Power: 295378	Why are you still On uprev Optimiser likes this.

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07-16-2023, 01:23 PM	#2 (permalink)
fryzia23 Enthusiast Member Join Date: Dec 2010 Location: new jersey Posts: 452 Drives: 2011 MB 370Z NISMO Rep Power: 1245	It’s in the tune. Too much fuel is dumped during hot starts and that’s why you need to add pedal input to add more air to get it started. Had same issue when went to 1050 injectors. Changed to ecutek as per tuner recommendations. Supposedly has more precise injector control. I’m Running same gtm stage 2 supercharger.