Hard Cold Start with a Pop
Alright fellas this is what I have. Early 99 F250 7.3 with 110,000 miles. I live in Anchorage and we have been below freezing but still in the positive temps.
At first, I only had the starting problem if I hadn't started the truck for a day or two not plugged up and now it is whenever the truck is cold. The past two days, I have had this issue at work where I cannot plug in and anytime where the truck has been sitting and gets cold. If I plug the truck in, it starts fine. When it is cold and not plugged, it just sits there and turns over until I hear what sounds like a backfire after an attempt. Then the truck will fire as if nothing was wrong.
My GPR is good and have good oil pressure and fuel. No check engine light or codes and wait to start functions as normal. It does smoke while it is cranking but doesn't fire until after the backfire. After being plugged up, it fires as advertised. I have disconnected the EBPV and has been for over a year now. It has an DIY intake and is straight piped.
It almost sounds to me like something is blocking the exhaust and then releases (backfire) allowing the truck to breath. I have not changed out my glow plugs but will be this weekend.
Would glow plugs cause this or is there something else I should be looking at?
I have done some searching on here to no avail. Any help is appreciated.