In early Dec. of last year my Jimmy which has the 4.3L Z engine died on me but after a change of plugs, wires, cap and rotor, fuel filter and the addition of a Jacobs Electronics Ultra Coil the truck up until last week ran better then ever. It now dies at idle and when I go to accelerate it is very low on power. Although it seems to be firing on all six cylinders, when it shifts it's at high revs and the truck lurches and top speed seems to be about 35 mph. I've once again changed every thing I did back in Dec. and on the advice of an engineer at work I changed out the oxygen sensor but with no improvement. I'm at wits end and am sadly without a code reader. Any ideas would be greatly appreciated!!
2007-03-24 19:21:17 · 2 answers · asked by pinchot 1 in Cars & Transportation ➔ Maintenance & Repairs
sounds like you might need to check your fuel pressure, if theres not a check engine light a code reader wont do you much good
2007-03-24 19:27:00 · answer #1 · answered by nessa 2 · 0⤊ 0⤋
Sounds like the tranny is slipping, maybe the bands in the transmission are worn. or the tranny oil is too low and the tranny is slipping that way. Change your tranny oil and look in the oil pan and filter for alot of friction material, there should be some, from normal use. this will tell you its time for a rebuilt tranny
2007-03-25 02:42:37 · answer #2 · answered by 4acee@sbcglobal.net 3 · 0⤊ 0⤋