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My 1995 dodge neon jerks at steady speeds. it also seems to sputter hesitate 2to 3 sec when i put the pedal down all the way.I have put new map sensor,crank sensor,coil,plugs,wires,set the timing,changed the fuel filter,checked the fuel pressure which was 50psi and ohmed out the tbs.
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Sounds like low fuel pressure. You need to have the fuel pressure tested. Low pressure could be a clogged filter or a weak or failing pump. Is your air filter in good shape-not clogged with dirt?
Jerks coming to a stop as in engine jerks, or does it seem like the brakes are jerking. When you leave off the pedal does it stop jerking? If it does it is probably warped rotors. A lot of new cars have this problem, my theory is that the brake pads they are using are way too hard. They put way too much heat into the rotor and warp it. Of course the rotors are none too heavy either. I think it is all in an effort to reduce weight in the vehicle.
Try exchanging the MAP sensor from the other "good running" car. What I think you are experiencing is a flat MAP which fails to read more than the minimum. A MAP sensor out on these cars will make it run absolutely terrible and die as you have indicated.
By unplugging the TPS sensor you are effectively putting the car in "limp" mode. In this mode it ignores a potentially bad TPS, O2, and MAP sensors and or circuits.
It seems like you have a vacuum leak in a hose some where. Check under the hood for any rubber hoses that are dry-rotted, cracks, or sharp bends in any of them.
if the car sputters or anything before it dies then u might have a fuel problem. u could try changing ur fuel filter. Or simply give the car a tune up. New spark plugs and wires.
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