Rough Running Engine

I have not checked, the engine when running is rough at idle, but does not sound like a misfiring cylinder, and that would not explain the loss of vacuum that does not recover, but I will check tomorrow to see if there are firing problems. Thank you and any other suggestions are appreciated.

When I first crank up I have to put I run it for about my foot on the gas and it sputters and runs hard like its missing. After I run it about twenty mins it so it starts idling fine until I turn it off. I try to crank it again right away and runs like trash all over again. Replaced plugs and wires and fuel filter and still didn't help. Please help.

K, I just put an engine in a couple years ago ran fine. About a couple months now. Ive been having trouble with it. As it step on the gas it hesitates. When I let up on the gas lopes like I have a race cam and the oil pressure gauge will drop with it not much tho. I thought it was a IAC sensor so I replaced it. But its not that.

Hi: Engine runs rough and misfires when accelerating. Idles fine. Changed fuel filter, plugs, wires, distributor cap and rotor. Thanks George

Hello, I'm having problems with my 1989 Chevy Silverado 1500. This truck has 112,000 miles and I have kept it well maintained, but it dies while you're driving down the road. It has a propane system that I installed, but the problem occurs while running on gasoline or propane: the "service engine soon" light comes on, the engine starts running rough, like "dieseling", and a few minutes later the truck will die. If you pull over and shut it off until the engine is cool you can get back on the road and it's fine. It only has this problem once in awhile, not all the time, and I have checked and changed every filter, valve, and line I can think of. Computer codes didn't help, and I've been to 3 mechanics. The truck does burn a bit if oil in the exhaust when you fist start it, and the heat gauge reads at 210 degrees when it has trouble, which is a bit higher then normal even with plenty of coolant. Someone suggested to check a exhaust valve, or the distributor/ignition module. Any ideas?

I will replace the coil tomorrow and let you know the out come. Thanks George

Yes I put the vacuum guage on multiple sources when the engine stalled the first time and the reading is consistent. The engine has good vacuum for about the first twenty seconds or so, although it is fluctuating, and then begins to drop at a rapid rate to zero, where the engine dies. I have tried everything to keep it running but once the vacuum drops there is no saving it even at WOT. This caused me to check and re check the hoses and connections against the schematics, and everything checks out. I pulled the timing cover and re checked the timing which was dead on, and I re adjusted the valves/rocker arms too but the problem persists.

No, I replaced all the hoses. But havent checked the intake. Ive seen an easy way to check for vac leaks but cant remember Do you know of any?

The codes that came up where all wrong, so that makes sense. But the light does come on. Could that still be it? Is it a "simple" fix? How much am I looking at to replace it? And is it something I can do myself?
Thanks for replying!