shaking while at idle

1995 4wd 4.3 cpi blazer. while at idle my car likes to shake a little. the idle doesnt move from 750. but my car shakes a little, kind of annoying. what do you think?

1995 4wd 4.3 cpi blazer. while at idle my car likes to shake a little. the idle doesnt move from 750. but my car shakes a little, kind of annoying. what do you think?


What have you done to the vehicle so far ? I'd suggest doing a few things to even out the idle....like
Like - Cap, Rotor, Plugs, Wires, PCV, Air Cleaner, Fuel Filter, sea foam in gas for starters.....

Next could be, I suspect Timing, EGR cleaning....

I have a newer blazer (99) so the timing is always set by the computer...but these are things I'd start with....

Isn't the harmonic balancer supposed to keep the shaking down at idleing? Just asking.

i just did a full tune up. just bought a egr valve 2 months ago. i was going to change my pcv valve tomorrow

Have you checked your CPI and nut kit? Might be starving a little fuel (enough to shake, though with your idle steady I'm not sure about that) Also take a look at your motor mounts. The may be farked and it's allowing the rocking in your motor.

i just did a full tune up. just bought a egr valve 2 months ago. i was going to change my pcv valve tomorrow


So...how many miles on the truck ?...

When you did a "Full Tune up" what does that mean exactly......

Did you change the wire sets.....maybe you have a bad wire....without knowing what you did in your tune up we are only guessing...so tell us more !!!! :rolleyes:

Have you checked your CPI and nut kit? Might be starving a little fuel (enough to shake, though with your idle steady I'm not sure about that) Also take a look at your motor mounts. The may be farked and it's allowing the rocking in your motor.

He replaced the CPI and nut kit about 2-3 months ago.

All Blazers are not perfectly smooth running engines.

183000 miles. that could be why. wires, plugs, rotor, cap, fuel filter, oil change(mobil 1), oil filter, air filter, 02 sensors. everything and anything. it isnt that bad of a shake, just a little tremble. not too bad that i will go off and spend 500 bucks to fix. thanks anyway everyone.

check the mounts

Replace the pcv valve also.