99 Ram 5.9 pretends to have turbo lag

[Sirriggs]

Gotcha. Your having as much luck as me. Sun came out so I climbed under the truck to scrap and clean bottom of motor to get the oil pan on and it started to sprinkle within a few minutes so once again I didn't get it on. I have been searching the interweb trying to find some information that may help but most say the same things you seem to already have done. I'm sure you went through and clean your throttle body and sensors right? Its harder now to trouble shoot simply things that use to be mechanical and now we have computers doing those jobs. Computers can be your friend but enemy as well. Once I get a few things button down, I am going to go through mine and clean everything I can before installing it back on my intake.

 

[Sirriggs]

I know you had the transmission serviced but I have read several threads about whats seems to be your issue and most seem to go back to kick down on transmission. From the way you've talked, you pretty much have tried everything or fixed most things that would cause this. My thought would be is mark where it sits and try maybe some adjustments and see if anything improves? One guys said his was running fine then gets up in the morning and it has no get it and go. the dealer tells him its the trnsmission throttle body but he takes it somewhere else and the guys crawls pulls out a chunk of dirt caught in the kick down and his problem was solved. That's crazy.

 

[Bear_Gibson]

I checked the tv cable at both ends and couldn't find anything out of place. It really sucks because the most important thing about this truck to me is missing. All that low end torque. I changed the IAC, but it seems like the IAC is being commanded more than usual. Lots of sucking noises coming from the IAC.

 

[Sirriggs]

Everything I looked up went to the kick down so that's why I asked. I know what the IAC is but what exactly its purpose? There really isnt much information what part and its main reason for it. I took everything off my throttle body and clean it spotless and cleaned the IAC that has some build up. If needed, I found all those parts a lot cheaper on Amazon then the local auto parts store. Its crazy there isn't much I can find on your issue. I will keep looking.

Don't feel bad, went back to double check my torque setting and snapped a bolt on the very front right corner. Tried to go in there and tried to remove but no luck. I'm just going to get everything back together to at least so I can get it running and see how it acts. If needed. All I have to do is remove the ac and go back in there to give another shot at removing the broken bolt. I just don't have any luck with getting them removed. I have broken more bolts this round then I have ever done my whole life. lol. Everything else seems to be going good.

 

[Bear_Gibson]

I actually changed all the sensors on the throttle body. It just seems odd that thepcm is commanding it open so much. The IAC (idle air controller) is the computers way of maintaining idle speeds. Like when you kick the ac on it keeps the engine from stalling. It bypasses the the throttle with it's own passage. My only hang up with the tv cable is that when i take off and it boggs. Shifting to 1st makes no gear change. The rpms are right for first gear. It feels like its in second, but the rpms say different. And there's no down shift either.

 

[Sirriggs]

I'm thinking of doing the same thing since it wouldn't hurt to do that. Got her up and running today. Like I said. Amazon had way better prices. Man I dot know what else to look for at this point to your issues. I will update my post not to hi jack yours with my deal. lol

 

[Bear_Gibson]

Decided to test the tv theory today, so last night i spent a few minutes adjusting the cable. Apparently, it has a very course adjustment. It would only tightes up in 1/4 inch incriments. Drove to work and while the drivability is improved, it didn't fix the bog issue. Its now too tight and won't 1-2 shift without letting off. But holy cow is it firm.

 

[Sirriggs]

How did you adjust the TV cable?

 

[Bear_Gibson]

At the throttle body.

 

[Sirriggs]

ok, I did it a long time ago but just can't remember. Old age lol. I'm still doing some research on your issues but information. Everything I found is pretty much the same.

 

[pacofortacos]

Did you do a cold dry compression test?

 

[Bear_Gibson]

No. I figured a loss of compression in an cylinder would be accompanied by a miss. I ran into that a few years ago with a burned #1 exhaust valve.

 

[pacofortacos]

Not nec. true. Low compression of one or more cylinders will give a power loss first. I had a cold compression loss on #8 cylinder (rings most likely) and never had a miss but power was down.
Reason I say cold dry test is it is more accurate than a hot or wet test. My #8 only really showed low cold and dry but the power loss was definitely there. Real reason I traded the truck in and bought a new Ram after 15 years.

 

[Sirriggs]

Have you had any luck with your problem Bear? Haven't seen any new post.

 

[Bear_Gibson]

Part of my silence has been from the tapatalk app no longer working. That just made it easier to get notifications on my phone. Today's update. I have yet to discover the torque leak at slow speeds. I just ran a compression test, all cylinders were between 170 and 175 psi.

 

[Bear_Gibson]

All the plugs had the correct gap. Truck almost acts like the converter has no stall at low speeds. I can feel the converter lock at the proper times. I was able to adjust the tv cable so that the truck is more driveable. The tv adjustment wasn't off, I'm just making it kick down sooner, and hold the gears longer until the truck spools that non-existant turbine

 

[Sirriggs]

I have exhausted any attempts to find anyone else having your same issue. Surely someone has had this issue but haven't posted it I guess?

 

[Bear_Gibson]

That's another reason I haven't posted. I'm outta leads. I'm not sure what else to check, or what I'm missing.

 

[Bear_Gibson]

So I was data logging and noticed that the pcm is pulling the timing wayyy back. I know the tune didn't remove all of the torque managment, but it never was that low before all of this. No I just need to find out why it's pulling out all of my timing. It doesn't even let the timing ramp up.

 

[Bear_Gibson]

Another update. I shot an email to the company I purchased my tune from. I asked if they could say why the pcm might cut timing. I also asked if there was a way to datalog. Using the supplied tuner since it comes with a usb cable and the tuner says datalog. Imagine my surprise, when the answer I got was take it to the dealer, we are not a service center. Wow, I shall never use them again. From now on, I will just go local, no matter how long I have to wait.