So a couple of weeks ago my Jeep started jumping. When I hit 50 it feels like the wheels are about to fall off. I put Blue Devil in it to temp fix cracked head, new distributor cap, new wires, new spark plugs, new radiator, new water pump, new thermostat, oil/filter changed, new battery...still don't know what is wrong. Any ideas? When idle car is jumpy, in reverse really jumpy, driving over 48 MPH extremely jumpy. It seems like my gas is going 5X faster than normal. My father-in-law thinks that I got some bad gas from somewhere. Or that something is wrong with my exhaust system? IDK I am really getting angry with this situation, I have spent a bunch of money and nothing is fixing the problem and I am running out of money to spend on this problem. Please Help!

 

Try this. After you shut it down, wait about 10 to 15 minutes and check your fuel pressure by depressing the shrader valve on the fuel rail. If you don't have pressure, you've probably got one or more leaking injectors.

This will cause the injector(s) to leak fuel on the "off" cycle between firing stokes and use a lot of fuel. It also won't run right because the PCM is trying to compensate for the over-rich condition.

See if you have any trouble codes set.