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i would start by checker your cat converter is not clogged. There are 3 way to do this you can have someone start the truck and rev it while you check the exhaust coming out of the tail pipe it should be a petty good flow coming out of the tail pipe, if no flow is coming from the pipe then yourcat conveters are clogged. The second way is to remove the o2 sensors in front of the cat converter and try driving it to see if it was accelerate, if you can accelerate then you know it's your converter if not then i would look athe the distributor and or timing.
Hi there? check the oil level. if there is no oil in the engine, it will make it nock especially at the top end.
If the oil level is ok then start the car and remove the oil top up lead and check if there's any oil coming up to the top of the engine. it should pray oil out of the hole. good luck..
The cylinders are worn out and the gap between them and the pistons is great enough when the pistons are cold to allow them to move around enough to knock the cylinder walls. The engine must be remanufactured - a very expensive job.
My First thought is fuel injectors pull off your air intake and airfilter cover spacer. start your engine look at the injectors you should see i steady stream of fuel spraying in. if you don't replace your fuel filter, injectors. If you can try to make sure your fuel lines isnt clogged.
You more than probably have a gas leak somewhere in the fuel system. If you can smell gasoline, it is leaking somewhere. The lines run along the frame to the engine. The leak might be hard to see or hidden (on top of the fuel tank).
The leak is robbing fuel pressure from the engine, causing it to idle rough, so is probably on the pressure side of the system.
(Most fuel systems, except for "returnless" systems with Pulse width modulated fuel pumps (not very common), have a pressure line and a return line to the tank.
first thing you need to do rule out vacuum to shifting module make sure there is no leaks you usually can detect by a hissing sound or high pitch whistle check your shifting module on your transmission providing transmission screen and filter has been maintained as for the second part gm powersteering pumps have a tendency to whir if a new belt has been installed until it breaks in