2000 Saturn LS2 engine starts shaking violently when accelerating

mrfreeziexp · 03-03-2008, 10:57 PM

Hi, I have a 2000 Saturn LS2 V6 with 115,000 miles on it. I've never driven it in harmful ways and the fastest I've ever gone is 75mph.

Recently, whenever I go up a hill(mainly) or sometimes(rarely) simply accelerating, my engine begins to shake, VIOLENTLY, it really feels like it's about to explode. It only stops when I let go of the gas, and it stops immediately, but as soon as I apply the gas, it starts shaking. It's never done this up until recently. Also, I don't hear anything to indicate engine damage in any form, no knocking or anything of that nature.

I've found that using some fuel injector cleaner seems to stop it for about a month, then the problem comes back.

Does anyone know what this could be and how to fix it? Someone told me "oh it's bad gas", is that possible?

Also, when I turn it on, the "Change oil soon" light comes on for about 10 seconds then goes away. Could this be related? Would changing the oil help? I think I'm about 1000 miles past when I'm supposed to have gotten it changed. This is because I've moved and just haven't had the time, before that I was always on time with oil changes.

Thank you for looking!

**Ssicarman** · 03-04-2008, 12:22 AM

I doubt that the oil has anything to do with it. If you are due for an oil change good idea to get it done.
Have you ever changed the fuel filter? If not that could casue a misfire under load. Is the SES light on or does it come on when the problem is happening?

mrfreeziexp · 03-04-2008, 03:06 AM

Quote:

Originally Posted by Ssicarman

I doubt that the oil has anything to do with it. If you are due for an oil change good idea to get it done.
Have you ever changed the fuel filter? If not that could casue a misfire under load. Is the SES light on or does it come on when the problem is happening?

I got the car about a year ago and I have yet to replace the fuel filter, but I don't know if the previous owner did or not. I will look into that.

No, the SES does not come on when the problems are happening, no light comes on.

Thanks for the feedback.

RC1488 · 03-04-2008, 05:26 AM

Id change the spark plugs first.

When were they last changed?

mrfreeziexp · 03-04-2008, 11:45 PM

well, I took it to Saturn and they said that the axle was "bent to hell" and he said that I was lucky I was able to the shop.. Wow, I had no idea.. $500 to fix...

Anyway, thanks for everyone's help, guess I've figured it out.