2007 Buick Lacrosse 3.8 cold starting problem
#1
2007 Buick Lacrosse 3.8 cold starting problem
I have a 2007 Buick Lacrosse with a 3.8 liter and it has a cold start problem. I have checked fuel pressure, Maf sensor, map sensor, checked for spark, checked both cam and crank pids while trying to start vehicle. I was wondering if anyone has come across this problem and what could possibly be causing this problem?
#6
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Only wait a second or two. The fuel pump primes and then stops. Wait to long and the pressure can drop off. Another test is unplug the MAF. It will run bad for a moment or two and then should smooth out. You can drive without the MAF plugged in, just drive easy.
#9
Well I checked the coolant temp sensor and it is good, also unplugged the MAF and it still wont start right up when cold, also checked cam and crank sensor, they are good, I did clean throttle plate andchecked MAF physically, it look new, also went ahead and changed spark plugs, but still have same problem, also checked O2 sensors pids and they are working properly, So I am not sure what else to look for at this time.