Sure, everything in a car is interconnected somehow. It may not be directly but inderectly they are. If you are running rich you are dumping exhaust rich in gas. That is going to do a number of things, cook your cat, and cook the O2 sensors. It may not happen right away but it will after time.

Same thing will happen if you are running lean except it's not dumping fuel. Which will mess with the MAF or MAP whichever one you've got. Eventually running rich or lean will affect the EGR, Fould the plugs, anc could possibly blow a head gasket.

Keep in mind these are all "What-If's" just because her o2 sensors are bad doesn't mean she's going to blow a HG. But everythign in a car is interconnected and over time one thing leads to another till you get a domino affect. And the term "Nickeling and Diming me to Death" comes in to play. Because one dayyou are replacing spark plugs, the next a head gasket and so on. This is of course if you let the problem persist then it starts to wear on other parts and eventually, you've got a nightmare.

 

Also check the engine mounts. A common failure on these cars. This can intensify the minor shaking of a rough idle and produce weird throttle responses as the engine shifts against the cable.
Almost certain to be bad solder joints on the gauge cluster circuit board based on the symptoms. This is described with a photo at http://www.neons.org/modules/news/ar...php?storyid=18. It has also been discussed elsewhere on this board.

 

Damn, I thought I had put that pic up on this forum. Good call b_s_d.

 

It had better not be the engine mounts. We just had those replaced when we were trying to get them to figure out the electrical problem >.<

Boy how the dealership loves to milk people!

 

For future reference, here is a link to the Neons' trouble codes, so screw the dealer: http://www.troublecodes.net/neon

If it is the motor mounts again, when you get the new ones also buy two sets of Rex motor mount inserts, this will help stiffen it up as well as put more power to the ground quicker, it will also make it impossible for the new mounts to ever go bad again. It seems that I cannot find the Rex inserts anywhere anymore, so...............

Here are the Prothane inserts if you would prefer them: http://www.modernperformance.com/dcx/prothane.shtml

 

modern performance sells the rex motor mount inserts for $30.00 i was just cruising the site and i saw 'em. check it out

 

Boy, with all the business we all steer towards Modern Performance, we should all get some sort of "reward" from them....agree?[sm=smiley36.gif]

 

Those same codes I had posted on the archived board of this site a few days ago.

 

Nah, just some customer service would be great. You are closer to them though, maybe we should pay you to go to the store directly and get our parts.


I mean afterall, what are brother's for? [sm=lol.gif]

 

Ummm...... was this done by the same Dodge dealership who "said he didn't have any info on the following codes: 12;43;43;21;51"? If so, I'd check their work very carefully [sm=sigh.gif].

If the problem of the car continuing to accelerate after taking your foot of the gas is not due to bad mounts, check that the throttle cable is not binding and the return spring is okay.

Does it have cruise control? If so, you can rule this out as a contributor by disconnecting the servo cable from the throttle linkage.