Runs rough at highway speed

Asked by GuruZR26L Nov 23, 2017 at 01:33 PM

Question type: General

1995 GMC Sierra c/k 2500 4x4 with the 5.7
(350) and I have change whole distributor,
cap, rotor, wires, plugs, knock sensor, iac
sensor, speed sensor, map sensor, tps
sensor, coolant temp sensor, egr valve,
new gas tank, pump, sending unit, gas
lines  and filter, oxygen sensor , manifolds,
cross over pipe , new muffler even reset
timing  with new gears and chain and it still
has a bad shake when it shifts into
overdrive after acceleration, also fixed all
the trouble codes and still runs the same ,
don’t know. What else to do , running out
of options .......

1 Answer

GuruZR26L answered 6 years ago

Gapped all new plugs again today and before I bought this truck they put a new crate motor and only had 75000 kn on the motor so I am wonder if they just put all the old components on it from the old motor but like I said all new sensors, egr valve was all gunned up solid and replaced it, wonder if I need to take I take off and give it a good cleaning

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