Sorry if I'm re-treading a previous post, but I couldn't find my answer. I have an 89 suburban with a 6.2, NA engine w/135k miles. I've been having trouble with the engine loosing prime overnight, but when I get it running, it runs great.
So I had a new mechanical fuel pump installed and the problem got a little better, then it got worse. Searching around I found a service bulletin that stated that the HPCA regulator valve should be replaced at the same time, so I changed that out along with the fuel tank pick up assembly and all rubber lines from the tank to the fuel pump. That's when the problem started. After replacing the above items, I pulled the glow plugs to get the system primed back up, still she only starts and runs for 2-3 seconds and dies.
I finally gave up and towed it to my mechanic who says that my injection pump (Stanadyne) isn't producing enough pressure and needs to be replaced ($2000.00). I'm not quite convinced that my pump needs replaced. It worked great one week, then after replacing the HPCA regulator, a week later the pump isn't producing enough pressure? I'm skeptical. Don't get me wrong if the pump needs replaced, I'll do it; I'm just not feeling warm and fuzzy with that diagnosis. Any ideas, suggestions? Thanks for any help! Diesel Burb
So I had a new mechanical fuel pump installed and the problem got a little better, then it got worse. Searching around I found a service bulletin that stated that the HPCA regulator valve should be replaced at the same time, so I changed that out along with the fuel tank pick up assembly and all rubber lines from the tank to the fuel pump. That's when the problem started. After replacing the above items, I pulled the glow plugs to get the system primed back up, still she only starts and runs for 2-3 seconds and dies.
I finally gave up and towed it to my mechanic who says that my injection pump (Stanadyne) isn't producing enough pressure and needs to be replaced ($2000.00). I'm not quite convinced that my pump needs replaced. It worked great one week, then after replacing the HPCA regulator, a week later the pump isn't producing enough pressure? I'm skeptical. Don't get me wrong if the pump needs replaced, I'll do it; I'm just not feeling warm and fuzzy with that diagnosis. Any ideas, suggestions? Thanks for any help! Diesel Burb
