I have a 2002 Oldsmobile Bravada that has a little bit of a shake under acceleration between about 30 and 50 mph. When I let of the gas the shake goes away. It also goes away once I get above about 55. I've no clue what's going on.... Any ideas will help.
Try balancing tires.
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Hook fuel pressure gauge up to port near firewall. A battery charger sometimes boosts the vehicle voltage just enough to engage weak fuel pump. Should show 50-60 lbs all the time while cranking when not starting on battery.
SOURCE: fuel filter location on 2002 oldsmobile bravada
Should be located underneath the vehicle on the framerail between the engine and fuel tank.
SOURCE: I have a 2003 oldsmobile
Make sure the fuel cap is fully seated. It could also be water in the fuel. Try putting some fuel treatment in that removes water.
SOURCE: shakes a little once its
Check the EGR valve sounds like its stuck in the open position.Take it off and clean with a non-chlronated brake cleaner and wire brush.
SOURCE: car shakes violently when at
There should be two sets of engine mounts: The first set are up front, near the radiator, probably an inch or two back on the engine. The next set should be supporting the very back end of the engine, right in front of the transmission. If it is only from 50-60 MPH, not going slower, not going faster, I would also look at transmission mounts, while you're at it. A friend's jeep does that. What you may also check, and this one is, like you've noticed, far less likely, make sure the injectors and the spark plugs are all functioning fine. Unlikely that's the problem, but one never knows...
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Have the CV axles checked. I replaced mine due to vibration. They are much cheaper now than they used to be.
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