Hi all
I am having trouble with my 2001 monte carlo
It shakes/trembles when in park and when accelerating or when i turn off my a/c the shaking tones down a bit.
-I took it to pepboys for a diagnostics test and they told me to change out my fuel filter, spark plugs, and wires. ( we did already)
- We then decided to clean out the throttle/air intake.
Yet still the same.....any suggestions? all is appreciated

 

Welcome to the forum!

Does it run good off idle? It could be a vacuum leak. You can test my misting carb/brake cleaner around the intake to see if it smooths out or RPMs pick up. Be carful not to start a fire it is flamable. if it runs rough off idle could me many things like plug wires, compression, carbon stuck in a plug, and more.....

 

I completely support what DE02Carlo said. Also, if you have BOSCH spark plugs installed, I don't care if they are brand new RIPP'EM out! They are JUNK! If they "work" in your car after install, give them 6 months. I know people who out of box the car ran worse then it did on the old plugs and I've had first hand experience. I back AC Delco and NGK plugs. NOT BOSCH (but BOSCH wire sets are fine).

Also, are you getting ANY check engine lights? Even if you're not, may be worth having the car scanned for any codes that may have tripped (but did NOT light the check engine light).

 

The first thing I would do is double check the spark plug wires. Make sure you didn't accidently cross a couple wires and that they are securely snapped onto the plugs and coil packs. If there is any oxidation on the coil pack terminals use a scotchbrite pad to clean them. If you decide to check for vacuum leaks I suggest using a hand held propane torch with a length of fuel line slipped onto the tip. It's more efficient at pinpointing vacuum leak locations and much safer than spraying a flammable liquid onto a hot engine.