give me a minute and ill tell u wha those codes mean.

 

34 = egr valve not opening properly.

63 = Throttle Position (TP) circuit fault, below minimum voltage.

85 = canister purge solenoid circuit failure --- adaptive fuel limit reached or 3-4 shift solienoid circuit failure

98 = electronic pressure control (EPC) driver fail in processor.

 

ill tell you from experiences from working on friends foxes:

1.) check your wires make sure there hooked up on the right spot on the dissy, maybe 1 may be off.

2.) a very common problem is your IAC(idle air control valve) its the thing that looks like a stack of quarters and mounts on your throttle body.

3.) your tps sensor is out of range should be between 0.92 and 0.97, so check the voltage.

if not one of those 3, possibly your ecm is going bad. hope that helps.

 

Me 2. My car acts different because it will start idleing lower then regular and the exhaust is just 2 strong..! After i run it hard on the freeway it starts idleing perfect afterwords but shortly after starts acting up! Car runs perfect but just idles pretty bad. sounds like if i have an aftermarket cam LOL>..have new wires and plugs!

 

mine is doin the sam thing... changed the cap, rotor, wires and plugs and it started actin lopy like that!

 

Well i was messing with the thing on top of the throttle body and my car got worse! I took of the plug for the mass airflow and it started idleing better! almost normal! can that give any help to solving this?

 

I was checking the voltage on the tps and I only get .05 and I try to adjusted but no luck I dont even get the needle to move lol any tips what it would be the cause of that???

 

You have a problem with the TPS (code 63)...... reason why code 98 (hard failure code present) shows up in the KOER.

 

should I change the tps? what would you recomend me? would that fix the problem?

 

Yep.... it is a failure code that needs to be fixed, after which, you should perform a Base Idle Reset. LUK