Hi all,
I had a problem 18 months ago, travelling to work in the cold/fog, where after backing off to allow a truck which was ahead, to turn, pressed the Accelerator pedal and no response, had to pull over and restart the engine to regain accelerator control of the engine.

Rang the local Chrysler Dealership and spoke to the Service Manager, to see if some codes could be pulled from the computer, and he basically said if the Engine Management light was not up (which it wasn't), there would be no codes to retrieve. I believed him because he is an American!! ( Only Joking, he is a great guy, and the best service manager I have ever encountered). He must be a nice guy, cos he moved to Australia!!!

I thought it might be the battery, being an 04, so had it tested, but it came up fine in the test.
The problem never appeared again, until yesterday, when puling out into a main road with a centre median, had to back off, then when accelerating off, same thing, no throttle response from the engine, till I restarted the engine. The same climatic conditions, being fog, cold like 8deg C ( 46 deg F ).

I was wondering if anyone has experienced the same fault, I am guessing it may be the throttle position at the pedal maybe, but not sure.

The car is a 2004 Roadster, which was first registered in 2006, common here in OZ, as they didn't sell very well.
It still has the original battery, which I will replace soon, but it is still functioning perfectly.

The car also is due for its 60000km ( 37000 Miles) service soon, so will get the accelerator problem checked out, was just wanting some ammo when I book it in.

Any info would be appreciated.
Cheers
Terry

 

Until a few days ago,Only had this problem occur one more time. Last week when overtaking
another car, the throttle response went dead. Did the usual restart and all fixed.
4 days later it did it again, but this time the Engine Management light came on.
I drove home, did a throttle recal on it and the Engine light went out.
I took it to my mechanic the next day, and he plugged the scanner in, selected the Crossfire from its menu, no codes.
By this stage the car was running normally, so he said to see how it goes.
I took it for a hard run down a long road, and within a couple of minutes
it went into limp home mode with the engine light on.
Took it straight back to the mechanic, he plugged his scanner in, selected
Crossfire, no codes, this is still with the engine running and the the engine light
on. We both couldn't understand it.
I suggested he select Mercedes R170 3.2, and guess what? It came up with a
Accelerator Sensor fault.
It seems strange that Chrysler couldn't find any codes when the problem surfaced years ago,
nor could my mechanic, until we selected the R170 Merc.

Anyway my mechanic contacted Chrysler about a new sensor. Have to replace the whole accelerator
Assembly, $550 and none in the country, minimum wait 3 weeks.
I told the mechanic to hold off with Chrysler.
I found the Merc part # and went to the local Merc dealer, and just gave him the part # , he came back with "that's an accelerator assembly for a R170 3.2. I told him my story,
and he asked how much Chrysler wanted for one, $550 I said, Mercedes wanted $715,
but he said he would price match and have one the next day.
Today I picked it up, exactly the same part,and he further discounted it to $525.
I will be installing it tomorrow.

 

Did you by mistake jump into a n/a instead of a srt-6?

 

Engine quit running or remained at idle?

 

Hey I've had the same problem 2004 also I'm from aus it's not a good feeling haha thanks for posting ill know where to start , do you happen to have a sprint booster installed it was really bad when I had mine installed happened a lot more maybe it messes with the sensor..?

 

I spent an hour in the service manual and I am amazed that there appears to be no diagnostics for a problem that does not set a code.

 

Throttle position sensors are in everything including my semi. Maybe the XF doesn't throw a code but my tractor threw over 300 codes before I finally had to stomp on the pedal. Yep, technician said to bang it to the floor a few times and sure enough it quit throwing codes. I would suspect it was losing ground. I have a new one on order for the day the stomp doesn't work lol.

 

I`ve had the same problem as yours!
You can translate from russian in google translate-
Fun-Cars ::
The problem was solved by changing acceleration pedal- only this can help you!
Pedal was bought from mercedes E class, because it`s much cheeper, then chrysler`s.

 

When the fault occurs, it seems like the engine has gone to idle, but it actually goes into a limp home mode, where you can accelerate very very slowly, and cruise. I drove home from work at 80Kms/hr(50m/hr) quite comfortably.
The funny thing is that every time the fault has occured, it has been early morning or late at night in spring/winter where the temp is really low (5 deg C), and there is a small circuit board inside the unit, so I bet there is a poor solder joint somewhere. When I install the new one, I will attempt to dismantle the old one and have a look.
I have never had a sprint booster installed.
As far as the codes go, the scanner the mechanic used doesnt just pull the codes, but once you input the type of vehicle, translates the codes into the fault.
It has historical and current data, and in history there was no accelerator fault, but I had BCM over votage, BCM under voltage as well as right window switch stuck in history. Even with the car in limp home mode with the engine management light on, when selecting Chrysler Crossfire on the scanner, it coundnt see the fault. It is only when selecting Mercedes R170 3.2, that it found the fault. Maybe Chrysler, (or Chrysler Aust) have stuffed up the codes somehow. The scanner the mechanic used was a WARELEAD EZ SCAN S1.

 

I think this is what my car has. The dealer wants to replace the throttle body... Non responsive throttle body. The car used to fix itself upon restart but not anymore. I will try my other ECU and maybe remove the Sprint Boster before bying the wrong parts. It won't be the 1st time Chrysler make me spend money in vain.

 

Hey guys,
I had some issues where my car would go into limp mode, usually if I was in a hard acceleration (but a few times just normal driving) and I could cycle the power and the pedal response would return. I removed the SB and that wasn't the issue, it turned out to be the TPS (accelerator pedal assembly). From what I am reading I will bet that is yall's issue also.

 

Have started to experience what sounds like a rather common problem with my '05. Also in the a.m. and in the cold (freezing) temps. First time, code indicated "throttle position" problem and mechanic said either the gas pedal assembly or the actuator. Neither sounds like a cheap fix and don't know how to tell which is the problem, as it is intermittent. Ugh! This morning it did it again, almost stalled out but did not activate dash light. Was told the actuator ( I think this is the part with the circuit bd ??) might be able to be repaired, but the gas pedal assembly is $290 for the part. Can't they take mine out and check it somehow ?

 

1. Do a throttle reset to reset the map in the PTCM.
2. Check/reseat the connectors to the pedal assembly and the throttle body.
3. replace the throttle body ( cheaper than the pedal assembly )
4. replace the pedal assembly.
5. replace the PTCM module ( God forbid )
Car-Part.com--Used Auto Parts Market has used pedals and TB's

 

~~sniffle~sniffle~~~ ~sigh~~


Being a southern girl myself, I can appreciate not liking to run in the cold.




Thanks for the tips and the schematic.

 

So after three trips to the coast and back trouble free and a week of being parked due to the weather, she's started acting up again. Got it to show code by stomping it to the floor, but it probably shows the same as before - "throttle position". It's like the gas pedal is on a 3 second delay. It's going into the shop this week and I'm tempted to have them change the throttle position sensor ($35 part at AutoZone) first before trying anything else that was suggested. Any chance it's as simple as that ? ........please say yes!


ann