Hell, I am once again coming to the forum for some help. I’ve been fixing up my crossfire and trying to work out all the kinks, one of the issues it’s had is that it will sometimes stall at a red light, after some research I found that it could have been the throttle body, so I went to needswings and bought the upgraded throttle body. As of me installing the throttle body it no longer stalls at idle, but it has stalled a few times when I accelerate from a red light. I connected a scan. Tool and got a code p0123 before replacing the throttle body, it said it was for a throtttle position sensor, but after talking with some people I’ve heard that it could be for the pedal position sensor? Could it be that, or maybe the mad sensor.

 

"Upgraded Throttle Body"? What did you put on the car? If you put the beefed up TB on without a tune, I'd expect you to have trouble.

It is a bad idea to mod an engine until you have it running properly, that way, when you do the mod, you know if the mod caused the issue. As it is now, you don't know if the mod did this or if you are still working on the original problem. Put the STANDARD part on and see what you have. DO NOT mod the engine until you have it running properly with the standard parts and configuration. Once you get that accomplished, THEN it's time to start trying mods.

Stalling on opening the throttle like that sounds to me like a disruption or variance of the Air-fuel ratio, which, if you put a different TB on than the ECU expects, would be possible.

(Yes, a screwed up MAF can also contribute to stuff like this. Maybe order the OEM MAF as well. Also, not sure why the Crank sensor was recommended, but it's a good idea to keep a spare with you , they fail without warning. FCP, German Auto, Needswings, AutohausAZ are all good sources. OTHER than Needswings, tell them you need a CPS for a 2003 SLK320. DO NOT search crossfire parts anywhere but Needswings - only Rob at NW knows what he's doing insofar as a Crossfire.

 

I bought the throttle body upgrade from needwings, the only thing it changes is the bore size of the throttle body, do I need to reset something so the pcm or ecu recognizes the higher airflow.

 

Get a CIA from needswings and your problem will be solved, if you do not have one on now. You do not need a tune with a the bigger throttle body. If you do not have the the CAI on now, I suspect your airfilter housing is old and slipping off the throttle body elbow on accleration. Have you recieved any misfire codes. Yes, you do need to perform a throttle reset.

 

I'm going to disagree with both post 2 and 4.
Going back to another throttle body just seems counter productive, but with the lager TB getting a "tune" is a good idea. I do not know if it is necessary. Rob at Needswings could give you a definitive answer so I would telephone him. The CAI is not the answer to your problem.
Code P0123 Is set by the Accelerator Pedal Position Sensor. (your foot pedal). It indicates a short to voltage, a sensor ground open or possible a problem with the PCM. This code will cause acceleration rate and engine output limits. You are correct to start with replacement of your foot peddle. There are test procedures, but they require a DRB III to make it simple. Curled up under the dash is not fun, so I would just get a new APP sensor. However I would be certain all the connectors are clean. If you see corrosion you may be able to clean the connector and make it function. Good Luck!

 

slyfox1812, another approach would be to clear the code P0123, drive the car and see if that code resets itself.

 

As I stated previously, you do not need a tune. I was quoted by one of the only people willing to tune our cars, "that is was totally a waste of money and their time." As for the pedal position sensor, I tend to agree with the code, but I have seen that code not be acurate. I have 2 xfires and one with 500,000 miles. So I have seen it all. By the way neither have been to a repair shop for anything, but clutch replacement. And good luck replacing the sensor or maybe the entire accelerator pedal. I don't know which it is? Maybe the pedal.

 

Replacing the pedal assembly is easy.

 

Where is the top nut please, I just do not understand the diagram.


Getting reoccuring P0122 and pedal to floor takes forever to rev.

 

1. Remove the lower nut cap.
2. Remove the 10mm nut.
3. Remove the washer, a magnet helps.
4. Remove the pedal, lift the bottom pulling out and pull it out of the upper bracket.
5. Unplug the tps cable from the sensor.

 

For more info type in how to remove a Chrysler Crossfire accelerator pedal on the Internet.

 

Understand the bottom, it is the top nut I can't find (diagram is from the '04 service manual).

 

That's because there isn't one. It should just pull out of the top bracket. Please reread post #10, unless 2004 was totally different.

 

OK will try, just was going by the '04 service manual & like to know exactly what I am doing defore I dood it.

 

No problem.

 

At the top, on the back, is about a 1/2 extrusion that goes into a grommet that it just pulls out of once you are clear of the stud at the bottom.

 

I had intermediate issues with my car going into limp mode, I stop and restart it, I read a bunch post about how fix it. The only way to really fix is to replace it , it is the the whole throttle pedal assembly. I found it at o'Reilly, for around 400 bucks, but a lot cheaper than going to the dealer. I had a P0122 code , my problem was at start up I had no throttle , I would restart it and it would be fine, but it set a check engine light and a code. I changed it and it fixed it .

 

Guess I am just cheap, and had same problem, no/slow throttle response when cold. Got one on eBay for under a Benjamin. Automagic also has separate kickdown switch, suspect would work for manual.. Bought one that also had connectors/stubs so could test on bench. Works fine now and no codes.

 

are you able to just replace the sensor, or do you have the replace the while pedal assembly. It's also had the the same code since I bought the car, and reoccurs whenever I clear the codes

 

Even Torque Pro can read the throttle position sensor. (main one at least) Is about 5 at idle and 20 at WOT. If lower, there you are.
I just bought one from eBay. One I selected (Crossfire automagic A 170 300 01 04 ) was under $100 with free shipping. Bought one with connectors and wire stubs so easy to test.