Alero wont cold start unless I use starting fluid

Ryan_Breiding
Fri, 17 Aug 2018 18:58:47 +0000
Maintenance/Repairs

I have a 2002 Olds Alero 3.4, 140,000 miles. My issue is my car will crank and wont start. I initially thought it was a security issue so I had Milzy Motorsport remove the security out of my pcm and still no luck. However usually if I change a part like unplug a pcm and re-flash it then put it back in my car it will start right up, however if my car sits over night and gets cold it wont start, But if I shoot a little bit of starting fluid in there and crank it it’ll fire a bit and then crank it again it starts right up. So I have come to the conclusion the system needs primed to start but I cant seem to find out why. It makes good compression, spark is good and fuel pressure is 58psi and then after the pump primes for like 10 seconds it sits at 50psi waiting for the vehicle to start. I’m at a complete loss because I can get this thing start it drives around really well its still really fast and it’ll start when I turn it off until it sits for about 6 hours or however long it takes for the motor to completely cool off. Also I took this to a shop they had it for 8 weeks and gave up on it. So feel free to respond, seriously any help is much appreciated.

16 posts - 9 participants