Chevy 3500 run issues
New video by Shane Powell
I love your show and YouTube videos. They have helped me so many times.
I have a Chevy 3500 2 wheel drive and it has had multiple problems and I have fixed most of them but in the process I have created a problem too I believe.
I have: put new control arms, rotors, calipers, brakes, barrings, new oil pan gasket and the truck ran good and felt great. However I noticed after parking overnight that I had some green fluid on my driveway and so I started to investigate and found a bad coolant hose. So I replaced it no problem.
Now the main problem that has been bothering me for a long time is this truck would only crank with starter fluid in the intake. I thought it was a fuel pump until someone mentioned to me to check the fuel pressure regulator. Unlike most that are easy to get to this one was under the intake manifold plenum. I replaced it and put new manifold gaskets in while I had it off. I also decided to clean the intake and I think this is maybe where I messed up.
I took the plenum off and sprayed engine cleaner on it and let it sit overnight. The next day I sprayed mineral spirits enough to get it watery and cleaned with rags until it was clean. You will see before and after photos in the link. I then put everything back together and tried to crank it. I got a backfire from the tailpipe. As I continued to crank I got it cranked without starter fluid but it ran rough and I noticed liquid coming from the exhaust and it smelled like gas. I had a friend crank it and rev it while I looked under the hood and I found a crack in the exhaust manifold and there was gas shooting out of it.
This is where I stopped and I haven't done anything since. The exhaust manifold is not problem, I can repair that. But I don't know where to go from there to get it to run appropriately or the gas coming from the exhaust. I am thinking it may be a fuel related issue under the plenum. Maybe the injectors are clogged, etc...
Any help would be appreciated and you can see the photos and videos in the link below.