Hard cold starts and dying while driving
02-13-2022, 10:29 PM
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Hard cold starts and dying while driving Hello,
I have a 2001 Firebird with a built ls2 and I’m having problems with the cold start and dying at stops when driving. The hvac vacuum line was not hooked up when I bought the vehicle so when I got it home and plugged it in I started having these issues, unplugged it and issues went away. I went had a tune on it and it seems the motor was tuned to speed density and is not running boost nor has a mass airflow sensor. The guy that tuned it recommended a new throttle body as it had a cheap Holley knock off in it with new Iac and tps. I replaced with a Nick Williams tb and new sensors. The problem consists. Any ideas?
I have a 2001 Firebird with a built ls2 and I’m having problems with the cold start and dying at stops when driving. The hvac vacuum line was not hooked up when I bought the vehicle so when I got it home and plugged it in I started having these issues, unplugged it and issues went away. I went had a tune on it and it seems the motor was tuned to speed density and is not running boost nor has a mass airflow sensor. The guy that tuned it recommended a new throttle body as it had a cheap Holley knock off in it with new Iac and tps. I replaced with a Nick Williams tb and new sensors. The problem consists. Any ideas?
02-13-2022, 11:18 PM
#2
TECH Fanatic
what is the engine management system?
02-14-2022, 01:44 PM
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02-15-2022, 02:48 PM
#6
TECH Senior Member
Find your ECM (computer) and see if it is GM or another brand. Stock units are all GM.
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02-16-2022, 03:36 PM
#8
TECH Senior Member