Limp mode - will happen (about four times now) after a short period of driving, and restarting the car will fix this and it doesn't re-occur during the drive afterwards. Also, nothing lights up and there's no warning. And, yes, I'm assuming it's 'limp mode' because the throttle is almost fully unresponsive and makes the car run like a mostly dead two-cycle Saab. I've done very little to the car mechanically after getting it, five months ago, except replace the air cleaners and the oil and rotated the tires, and had some front-end work to pass inspection here in MA. I've reset the throttle hoping this might work, but it didn't. I have very little info about the history of this car - a 2004 6-speed coupe with 75K - but all the service records I have access to have no indication of problems. Is it perhaps time for the (so common here) RCM replacement/upgrade? Any ideas from the enlightened group here? I have not as yet checked for codes, since nothing lit up on the dash.

 

Limp mode suggests it's an automatic, but .... Is it an automatic? have you checked under the passenger carpet for water damage? (Might be a TCU issue). Have you read the DTC codes? Are you leaking transmission fluid - low fluid levels or leaks around the electrical connector in the transmission could cause you to go into limp mode.

 

Sorry, no, it's a stick - it may not be limp mode but it is a decided loss of power and throttle response. I'll check the things you mentioned, but I didn't bother with any codes yet because no warning lights occur.

 

I would still check for codes, otherwise you are just guessing.

 

Okay- next step. I’ll report any here. Most likely this weekend

 

Okay, since it's a stick, you don't have to worry about the TCU. Maybe a long shot but check the connections to the ignition coils - if one is loose, or the wires are worn/chewed, it might start fine, but after a little while, lose contact, and then that cylinder shuts down (although that would eventually throw a P0600 code, but only after a certain number of misfires). Not all error codes throw a check engine light.
Good Luck

 

Thanks. I’ll check the cabling

 

OK, this weekend I'll be checking the codes. I have a reader from my other car which is newer so it should be okay in the Crossfire. But - a question - can I check at any time or does it need to be in the limping mode to check the codes?

 

No, it doesn't have to be in limp mode to check the codes. But if would be good to take note of the live data when it is in and out of limp mode - that might tell you something like the fuel mixture is too lean or rich, or the advance is weird. Never know what might pop up.
Good luck
-Jerry

 

Okay, attached the reader - not easy in a Crossfire due to where they put it - and drove around for twenty minutes - got a few chores done, but the limp never happened. But, the analyzer did report a 'throttle position sensor' 'switch power low' or something very close to that. I didn't have my phone with me so didn't take a picture, but it certainly makes some sense that an issue with that sensor might be at the core of my problem. Did a quick check and it looks like replacing that sensor is not a difficult task. I'll order one immediately..

 

Keep us posted!

 

Okay- I did the reader again and took a pic with my phone so I'd remember what the heck it said - code "P0122 - Throttle / Pedal Position Sensor / Switch A Circuit Low" and this was constant from starting up, and once again, a good twenty minutes running with no return to the limp mode, proper throttle all along. However, if it is the Pedal Sensor, that looks like I need to replace the entire Pedal Assembly, but that also looks like a fairly quick job. So, I ordered a pedal assembly. Also seems like a good part to have handy in the spares shelf....https://www.crossfireforum.org/forum...html#qrcontent

 

I something very similar to this happen yesterday. From a dead stop it would respond normally but once it went into third fourth or fifth I would have almost no throttle response. I have an srt so an automatic. Car was throwing possibly the same code as you a month back but when that would happen it would go into limp mode and it stopped happening once I changed the motor mounts. Interested to hear if the pedal assembly fixes yours I may have to do the same

 

Received the pedal assembly and the washer liquid bottle is on its way - also getting some strange behavior from the alarm system- deciding to go off all by itself for no reason. And, I'm getting a spare RCM which I will send on to DJ for the spruce-up. All in all, as someone elsewhere reminded me, sort of doing the usual stuff one does to a 20 YO car. Although I did expect it to behave a mite better. Keep you posted.

 

Here's a link to a post I did about replacing the alarm siren and cleaning the drains. I hope that it will be useful.
Alarm siren replacement/Drain cleaning

 

Sounds like the alarm siren batteries are bad and leaking acid, shorting out the circuit board. Remove the cowl and unplug the siren.

 

I'll be heading to the garage on Monday, Vets' Day for the pedal replacement, the washer fluid bottle, and a new battery. We'll see if the P0122 goes away and the alarm weirdness.

 

I can now report that replacing the pedal assembly solved the problem. I also had the garage disconnect the siren. I also needed to replace the RCM - will be sending the old one on to DJ - because all of a sudden it wouldn't crank or start. Although that was an additional headache, unrelated to the pedal sensor error.

 

Thanks for sharing the solution.