Time for a second opinion. Sounds like you could have nothing more than a misfire condition due to spark plugs and wires, or it could be as serious as a burned valve and low compression in one or more cylinders. That hardly calls for an entire engine. A valve job takes care of bad valves.
GM also has a huge problem with their injectors causing running problems although what you described sounds a lot worse than what injectors can cause. Chrysler buys their injectors in matched sets and problems with them are just about unheard of. GM takes a handful of injectors out of a bin and throws them into an engine without matching them for flow rates. It is real common to have a couple of cylinders running too rich and a couple to be too lean. The lean ones cause too much unburned oxygen to show up in the exhaust where it is detected as a lean condition, then the Engine Computer commands more fuel to all of the cylinders. Buying a matched set of rebuilt injectors will solve that problem and greatly improve horsepower and fuel mileage.
If spark plugs and wires don't help, the next step is to perform a compression test. If any cylinders are low, a cylinder leakage test can identify the cause of the low compression.
Friday, May 27th, 2011 AT 7:39 AM