1996 Chrysler LHS Engine shakes a lot when accelertating

MIKE LUND

MEMBER
1996 CHRYSLER LHS
6 CYL
FWD
AUTOMATIC
12,000 MILES

For the past year, whenever I use any non-Chevron gas, the engine shakes so much on acceleration, I think one of my tires has gone flat. I've tried alternating Chevron with Costco/Safeway, but usually more than tank of non-Chevron gas results in bumper to bumper shaking on acceleration. I'm trying to figue out if it's an oxygen sensor, fuel filter or what. I can't afford to start replacing parts on a hunch, or pay a mechanic $85/hr to track it down.

5 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

U can do so
by checking for codes as a 1st step
auto zone offer scan for free
or u can try the key cycle self diagnose
and it goes like this
cycle the ignition key on off three time
codes should appear in the odometer area and or check engine should flash the codes
let me know

o2 sensor the most common but lets check for codes 1st

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Sunday, July 27th, 2008 AT 8:56 PM

MIKE LUND

MEMBER
3 POSTS

I tried the 3 cycles of ignition key. No codes appear, but the check engine light flashes in odometer area. To add to the confusion, this morning I was on my way to buy gas and there wasn't any hesitation or shaking. Engine is running smooth as silk. I will head to Auto Zone to see if they can detect anything with their computers. Thanks!

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Monday, July 28th, 2008 AT 1:30 PM

BMRFIXIT

MECHANIC
19,053 POSTS

Check engine is blinking the codes (* ** is code 12 ***** ***** is code 55 )
best take it and have it scanned at auro zone
let me know what do u have for codes
good luck

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Monday, July 28th, 2008 AT 4:31 PM

MIKE LUND

MEMBER
3 POSTS

I tried to cycle the ignition 3 times again, now nothing shows up on the dash. To my recollection, the first time I saw the "Check Engine" light, it flashed the code for 12.
The car runs smooth as silk now.I'm beginning to think it has a faulty sensor or there's some glitch between the oxygen sensor and the computer.

By the way, Auto Zone has a pending lawsuit and no longer offers the free computer check. They also said they d=no longer have the OBDII computer needed to check the engine codes. Guess I'll have to wait for the next round of shaking to determine the problem.

Thanks for your help.

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Thursday, July 31st, 2008 AT 12:05 PM

BMRFIXIT