Hercules

My wife's 2000 Olds Bravada just refuses to start after it's been sitting over night or at work for 8 hours in very cold weather...around 0 to10 F. It fights her, but will eventually start, if it's been sitting over night in temps from 10 to 20 F(meaning it may take 4-5 tries). Anything above 20 F it seems to start, sometimes requiring 2 tries. The warmer the temp, the easier it is to start. This has been going on for 3 years now and I have never isolated the problem. At first I thought it was fuel line freeze up and every year I run fuel line anit-freeze through it. It makes no differnce at all. Last year I thought I found the problem when I isolated a fuel pressure drop at start up. I replaced the fuel pressure regulator and the fuel pump. That ended up being a bad fuel pump letting pressure drop off. That fix only lowered the temp at which it will start by a few degrees. About a week ago, she had a major fuel line leak, which I replaced the fuel lines and fuel filter on the truck. That too appears to have helped starting, but, the problem still persists. Does anyone have any ideas what will stop this Bravada from starting when it gets below 10 deg F? IT sounds like it's getting no fuel, but, I wonder if it has something to due with ignition instead. Thanks for the help!

Number47

if i remeber correctly that is the blazer body style with the 4.3L and its because of a poor injector design my mom had a 98 and it was a pain to own in the north so she sold it