04mbc230

I experience something werid today.

While driving and going uphill, I tried gasing it a bit in hope of that higher rev and push the car with acceleration. Nothing happens, that usual acceleration surge did not come. I thought that was odd and tried again. Nothing. I then thought, how about hitting that all the way button, that would surely make it accelerated. Nothing happens. I did this all the way to the top of the hill. Apparently, the car didn't accelerate and kept it's rpm all the way. While this is happening, the car slowed down since it's goes uphill, but it didn't downshift either to rev up and kept in pace.

I got over the hill and though, it should rev on flat road while on freeway. Drove for another mile or two and step down. Nothing. I had a feeling something is wrong. I pulled over and shut the car down for a reset.

After I did the reset, everything seem normal. So did I just experience a limp mode on acceleration?? No codes, nothing. First time I experience this.

On a side note, I do have issues with the speed sensor where I need to replace. The speed sensor is causing a few limp modes this month and I am ready to change it out. The limp modes I experience it will have high rpms and won't shift up. But this is different today.

Or perhaps this is the same and related to the speed sensor?

If not, what can cause this? Thanks in advance.

LILBENZ230

Sounds like limp mode to me. With the 2006 it's likely related to the 7G transmission.. especially since you've already had some trouble with it.

04mbc230

You mean it's related to the speed sensor?

LILBENZ230

You are talking about having trouble with the 7G transmission throwing codes right? You'll have to replace the conductor plate in the transmission at a dealership only. That will cause random limp modes, possibly without check engine lights. Did you check to see if the car stored a code?

04mbc230

I am talking about a new experience with the car having no acceleration and possible a new type of limp mode.

I am wondering if this is related to the speed sensor.

I didn't check for codes yet, but will. I am sure there would be some codes. There was no CEL though.

LILBENZ230

I don't think there are different types of limp mode. It sounds like your 7G was stuck in a higher gear this time than it was last time. That's known to happen with the failures of the conductor plates/speed sensors on these. Given that you know your car has that issue that is most likely what it was. It is probably time to go ahead and pony up to replace the conductor plate.

04mbc230

Awww... But.. But... I just fixed the darn thing. Remember about the thread on the Transmission Pump. I had let those ponies go and now this.
I was hoping this Limp Mode would just sliently go away and leave me alone.

Yea, I know. It's time. How deep of a hole I have to dig for this?

LILBENZ230

$1200-1500 is what seems to be the average. So you had the other noise with the 7G? The whine that is the input shaft bearing or pump or something I can't recall.. And now you've got conductor plate problems?

Very sorry to hear that.

04mbc230

Yeah, it sucks. I put up a lot of ponies from the day I owned this thing regarding the trans.

Is that included labor or just parts?

LILBENZ230

That should be the total.

Das_Stig

I just had this same exact thing happen to me yesterday. Stepped on the gas to go up a hill and nothing happened. Tested a few times with the same result. Once I was back on flat ground it was back to normal....weird

Glyn M Ruck

Read codes.

Check that fuel pressure is > 55 psi while cranking.

04mbc230

Glyn, are you suggesting that it's not the conductor plate and something else?

This is killing me.. More items to replace?? So what do you have in mind. The werid thing is, I hear this tapping noise on the rear right side where you dispense the fuel into. It sounds like it's under the rear seat. Could this also be a problem, perhaps fuel pump issues? Well, this could be a seperate issue from the no accerlation or is it the same?

More bad news and I am going to give up on this thing.

LILBENZ230

It could be a fuel delivery issue, that's possible. But the fact that you're already having issues with the transmission that you acknowledge is not fixed is why I think you had a transmission fault that put you in limp.

You need to check stored codes to be sure, though.

Glyn M Ruck

I'm not sure it's going into limp but we need those codes & it will tell us if it needs a conductor plate. You might have a fuel pump issue.

That tapping is usually just a fuel sensor float & not a cause for concern. Does it shut up with a full tank of fuel?