Car won't rev higher than 5-5.5k RPM Help!

[jtehh]

Reaching the end of my meager knowledge
Are there any mods on the car that you know about besides the tune?
And if you do another log, could you add the knock count? The corrections look okay, so pretty sure nothing will show. But just looking for reasons your ecu would try to "protect" itself by limiting rpms at 5k.

 

[D1JL]

It is always good trouble shooting technique to stare by removing anything you are not sure of.
In this case I would suggest removing the AP completely.
As anything can fail that is just a good place to start.


Dave

 

[NormDriver]

Reaching the end of my meager knowledge
Are there any mods on the car that you know about besides the tune?
And if you do another log, could you add the knock count? The corrections look okay, so pretty sure nothing will show. But just looking for reasons your ecu would try to "protect" itself by limiting rpms at 5k.

Alright here is the last log, this time it actually happened the wrench light came on with the weird turbo whistle and narely any boost. The car has an Injen cold air intake and a MBRP 3" catback exhaust
https://datazap.me/u/normdriver/log-1525827411?log=0&data=5-11&hg=22-23-24-25-28-27-11

 

[NormDriver]

It is always good trouble shooting technique to stare by removing anything you are not sure of.
In this case I would suggest removing the AP completely.
As anything can fail that is just a good place to start.


Dave

But the problem still happens without the AP, actually when I installed the AP it made it better bc before it used to jerk the car when I was accelerating, so idk

 

[Hijinx]

Hey op, I was looking at the boost curve and it doesn’t look like a stock turbo...


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[NormDriver]

Hey op, I was looking at the boost curve and it doesn’t look like a stock turbo...


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It does not feel different and I'm pretty sure it's stock, I've looked at it before

 

[Hijinx]

It does not feel different and I'm pretty sure it's stock, I've looked at it before

If it’s a hybrid it will appear stock. The only way to really know would be to remove the downpipe and check the turbine/wastegate.

Are you saying your car feels similar to a new FiST? Like I said, that boost curve at WOT does not resemble a stock turbo.


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[apex1]

If it threw a code related to the catalytic converter, is it possible that it is partially obstructed?

 

[Hijinx]

Here are a few datazaps to look through. If you look at the boost curves, you'll see why I think you could possibly have a hybrid... OR it could be that your turbo is bad.

Anyway, the following is from long ago on one of the first hybrids that were available to us. This fully tuned on 93:
https://datazap.me/u/hijinx/panda-cyborg-v1-best?log=0&data=3-4-7

Here is the base tune for that hybrid:
https://datazap.me/u/hijinx/panda-cyborg-base?log=0&data=4-7&trim=1&tmin=100.00&tmax=100.00

Unfortunately, that turbo died. It was replaced with a "better" version, here's the base:
https://datazap.me/u/hijinx/cyborg-v2-base?log=0&data=4-7

Here are logs that were done just before that "base" tune. The calibration was the first log I posted and I was using that as a "base," initially.
https://datazap.me/u/hijinx/cyborg-v2-untuned?log=0&data=4-7

And for bonus data, here's what a stock turbo boost profile should look like (Cobb Stage 2 tune). This is as far back as I can go, unfortunately.
https://datazap.me/u/hijinx/first-datalog-mountune?log=0&data=4-8

I have many more, but I think those support my argument for believing you may have a hybrid turbo on the car. But I could be wrong too.

If it's possible, pull the downpipe and get a picture of the turbine. We'll know for sure at that point.

 

[Bizzareo]

Here are a few datazaps to look through. If you look at the boost curves, you'll see why I think you could possibly have a hybrid... OR it could be that your turbo is bad.

Anyway, the following is from long ago on one of the first hybrids that were available to us. This fully tuned on 93:
https://datazap.me/u/hijinx/panda-cyborg-v1-best?log=0&data=3-4-7

Here is the base tune for that hybrid:
https://datazap.me/u/hijinx/panda-cyborg-base?log=0&data=4-7&trim=1&tmin=100.00&tmax=100.00

Unfortunately, that turbo died. It was replaced with a "better" version, here's the base:
https://datazap.me/u/hijinx/cyborg-v2-base?log=0&data=4-7

Here are logs that were done just before that "base" tune. The calibration was the first log I posted and I was using that as a "base," initially.
https://datazap.me/u/hijinx/cyborg-v2-untuned?log=0&data=4-7

And for bonus data, here's what a stock turbo boost profile should look like (Cobb Stage 2 tune). This is as far back as I can go, unfortunately.
https://datazap.me/u/hijinx/first-datalog-mountune?log=0&data=4-8

I have many more, but I think those support my argument for believing you may have a hybrid turbo on the car. But I could be wrong too.

If it's possible, pull the downpipe and get a picture of the turbine. We'll know for sure at that point.

Imagine if got a hybrid trubo car

Gonna takae a look at those logs out of my own curiosity

OP, is the intercooler stock? (you should see black plastic end tanks). Can we see some photos of the downpipe etc?

It might not help us, but it might

 

[Truth in Ruin]

Well, this just got interesting.

 

[Xaendeau]

Oh, boy. That turbo is running a little lean, you have too much air. I've had the same issue at 5k-5.5k, and it seems to be a point where if the car things something is wrong it will shut it down there. My issue was a damaged wire for the HPFP + rain. It was the weirdest thing, the car would hit what felt like the rev limited and make angry relined noises

Not that that is the issue, but my issue stemmed from the car having weird fuel delivery from the HPFP acting funny. It did not like that and shut down under boost, like I hit a rev limited. However, OP should probably have to pull off the intake and look at the compressor outlet, or look at the exhaust turbine by pulling of the exhaust. It just looks like there is too much air or not enough fuel, car doesn't like that or something else is wrong and the ECU is freaking out to save itself in the high RPMs.

 

[NormDriver]

Oh, boy. That turbo is running a little lean, you have too much air. I've had the same issue at 5k-5.5k, and it seems to be a point where if the car things something is wrong it will shut it down there. My issue was a damaged wire for the HPFP + rain. It was the weirdest thing, the car would hit what felt like the rev limited and make angry relined noises

Not that that is the issue, but my issue stemmed from the car having weird fuel delivery from the HPFP acting funny. It did not like that and shut down under boost, like I hit a rev limited. However, OP should probably have to pull off the intake and look at the compressor outlet, or look at the exhaust turbine by pulling of the exhaust. It just looks like there is too much air or not enough fuel, car doesn't like that or something else is wrong and the ECU is freaking out to save itself in the high RPMs.

Well, this just got interesting.

It is always good trouble shooting technique to stare by removing anything you are not sure of.
In this case I would suggest removing the AP completely.
As anything can fail that is just a good place to start.


Dave

Hey op, I was looking at the boost curve and it doesn’t look like a stock turbo...


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If it threw a code related to the catalytic converter, is it possible that it is partially obstructed?

Imagine if got a hybrid trubo car

Gonna takae a look at those logs out of my own curiosity

OP, is the intercooler stock? (you should see black plastic end tanks). Can we see some photos of the downpipe etc?

It might not help us, but it might

I'll preface this with I'm by no means a tuning expert (or even novice). But I read a bit and learn stuff here and there. I may find more, but the first thing that stands out is your AFR. It stands out because when I get a tune from Stratified they put this in their e-mail:



For those WOT runs where your have pedal to metal, your AFR is typically 12.4 and higher. So you may be running a bit too lean? Not sure if that will cause it to limit revs though.

Alright guys I FRIKIN FIXED IT! YOU WONT BELIEVE HOW! LOL so I get under the car and start looking around, first thing I see is that there is wear and a hole on the black cover that covers the serpentine belt and pulleys from the bottomof the engine on the passenger side. So I pulled it out with just 2 screws and looked at the crankshaft pulley. There was cv axle grease EVERYWHERE. So I looked at the crankshaft positioning sensor to see if it was damaged since I got he P0339 code. That thing was caked in grease. So I unbolted it and took out the plug and gave it a really nice clean with some degreaser and bolted it back in. Also cleaned off all the other grease around the pulley. Put everything back, started it up, cleared the code, warmed up, and took it for a drive. Floored it and it went to frikin 6.6k rpm without any interuption. It felt really weird since I was never able to go past 5.5k rpm. Looks like the previous owner blew up the cv axle and it put a hole in the cover and covered everything in grease, including the crankshaft positioning sensor. Im guessing the sensor wasnt reading properly so it would cut the throttle to save the engine. I would have never guessed that that was the cause lol. Thank you all for your advice, and idk about the hybrid turbo thing.

Here is a log i did after I solved the problem: https://datazap.me/u/normdriver/fixed?log=0&data=5-11&hg=3-5-11-15-26

Thank again for advice!

 

[NormDriver]

If it’s a hybrid it will appear stock. The only way to really know would be to remove the downpipe and check the turbine/wastegate.

Are you saying your car feels similar to a new FiST? Like I said, that boost curve at WOT does not resemble a stock turbo.


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Is there a way to check without removing downpipe? Even though I thinkt the previous owner would have just took off a hybrid turbo and other mods.

 

[haste]

You could remove the oxygen sensor on the downpipe and use a borescope to look at the turbine wheel, or remove the intake piping to the turbo inlet and look at the compressor wheel. Most hybrids should also have an aftermarket inlet elbow as the stock one acts as a restriction.

 

[NormDriver]

You could remove the oxygen sensor on the downpipe and use a borescope to look at the turbine wheel, or remove the intake piping to the turbo inlet and look at the compressor wheel. Most hybrids should also have an aftermarket inlet elbow as the stock one acts as a restriction.

Naa, I think mine is stock. The inlet pipe is black and plastic. Idk why boost log looks weird

 

[Hijinx]

Naa, I think mine is stock. The inlet pipe is black and plastic. Idk why boost log looks weird

Can you get a third gear sweep? from like 2k to redline?


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[NormDriver]

Can you get a third gear sweep? from like 2k to redline?


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I'll do one tomorrow in the afternoon and post it

 

[NormDriver]

Can you get a third gear sweep? from like 2k to redline?


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Here is the 3rd gear log, I wasnt able to go redline because of space: https://datazap.me/u/normdriver/3rd-gear-2k-rpm-wot?log=0&data=5-11

 

[jtehh]

I dunno man. For me, it looks like you are letting off the gas at around 5k rpms. When you say it won't go higher than 5k, I expect to see the pedal position near 100% while the revs hang out at 5k or bounce against it. But in all of these logs, I watch revs climb while the pedal is down and then you let off at just under 5k and the revs come back down.
https://datazap.me/u/normdriver/3rd-gear-2k-rpm-wot?log=0&data=2-5-11&zoom=130-148


It does look like cylinders 2-4 registered a knock.
https://datazap.me/u/normdriver/3rd-gear-2k-rpm-wot?log=0&data=11-23-24-25

AFR is still on the rich side (never gets below 12.2)