[SOLVED] No power, enters limp mode on acceleration

Enki said:
OK then, shit's haunted.
Click to expand...
Agreed, its really bugging me
I was thinking maybe a valve wasn't closing properly, or burnt, but then I would have 0 compression and it would run like shit all the time.
I don't get that it happens only under load, i don't know where else to look. Im trying to get it to a garage that specializes in speeds but idk when that's gna be
 
Mechanics are all packed with tire season here, everyones getting their winter tires put on. Its a 2 week wait, so i'd really like to figure this out
i took another log, I was almost WOT I added some parameters but I don't know what to look for, it seems to start going lean at the same time that the fuel trims stop doing anything.
anything sticking out?
@Enki @StreetSpeed6 @L337TurboZ
Thanks for all of your help
Edit: if i calculate the mg/cyl which is 10, to the g/s which is 121.9, technically i should be getting a fuel mixture of 12afr right? its reading 19 afr at this row of the log
 

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2 weeks isn't that bad of a wait. Try being 4-6 weeks out for transmission work like my dealership is. I have a 2020 Corvette I need to put a transmission in and it's been there two weeks now waiting on me to get to it.

Here's what I want you to do. Do a wet and dry compression test both cold and hot. Report back with the numbers.

As for the lean condition if you're going WOT the ECU isn't monitoring the fuel trims. It's switching from closed loop to open loop.

Did you reflash the map as suggested and see if that made any change?
 
L337TurboZ said:
2 weeks isn't that bad of a wait. Try being 4-6 weeks out for transmission work like my dealership is. I have a 2020 Corvette I need to put a transmission in and it's been there two weeks now waiting on me to get to it.

Here's what I want you to do. Do a wet and dry compression test both cold and hot. Report back with the numbers.

As for the lean condition if you're going WOT the ECU isn't monitoring the fuel trims. It's switching from closed loop to open loop.

Did you reflash the map as suggested and see if that made any change?
Click to expand...

I know, im just anxious to get it working again. Its already been having this issue for 2 weeks.
Ill do the compression test wet and dry, ill report back in a couple days for that.
As for the tune, i deleted the stage 0 off my AP but i put on the stage 2 and it had the same issue, the only thing im missing fro stage 2 is the intercooler I think
Also I wasn't WOT, i think i was close too it but I don't think it was WOT so fuel trims should still be working
 
chris' speed 3 said:
I know, im just anxious to get it working again. Its already been having this issue for 2 weeks.
Ill do the compression test wet and dry, ill report back in a couple days for that.
As for the tune, i deleted the stage 0 off my AP but i put on the stage 2 and it had the same issue, the only thing im missing fro stage 2 is the intercooler I think
Also I wasn't WOT, i think i was close too it but I don't think it was WOT so fuel trims should still be working
Click to expand...
If only you could get the stage 0 back....oh wait there is
https://www.cobbtuning.com/maps
 
Awafrican said:
If only you could get the stage 0 back....oh wait there is
https://www.cobbtuning.com/maps
Click to expand...

i know there's a way to get it back, there's no need to tho we were just testing to see if a different tune would change anything

Enki said:
Do me a favor and measure the id of the intake with the filter off.
Click to expand...

so maf housing diameter is little less then 3 inches and same for the intake elbow and then the TIP starts at 3” then shrinks down to the 2.16” turbo inlet
 

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chris' speed 3 said:
i know there's a way to get it back, there's no need to tho we were just testing to see if a different tune would change anything
Click to expand...

Wether or not it seems redundant it would help to just reflash to that as a test procedure. Instead of focusing on the level of boost you're trying to target, focus on the other issues that your car is currently displaying.

Low compression, lean conditions, failure to build boost. It sounds like a mess. Personally I think your motor is shot.

If you can't build compression you can't get the turbo to spool properly. It just won't happen. The turbo is reliant on the ability for the engine to push air out. If a cylinder can't compress the air then it's essentially not working. Even during a cruising condition you could drive it relatively ok with low compression but not have enough to make power.

There is also the tune factor. Your WGDC could be messed up. You said you were tuned by Freektune right? He's a solid tuner and knows his stuff. I have yet to hear of anyone having an issue with him unless it's something they caused on their end of things.

Have you tried to reach out to him to see what he thinks? Was his tuning finalized and on the last map?
 
L337TurboZ said:
Wether or not it seems redundant it would help to just reflash to that as a test procedure. Instead of focusing on the level of boost you're trying to target, focus on the other issues that your car is currently displaying.

Low compression, lean conditions, failure to build boost. It sounds like a mess. Personally I think your motor is shot.

If you can't build compression you can't get the turbo to spool properly. It just won't happen. The turbo is reliant on the ability for the engine to push air out. If a cylinder can't compress the air then it's essentially not working. Even during a cruising condition you could drive it relatively ok with low compression but not have enough to make power.

There is also the tune factor. Your WGDC could be messed up. You said you were tuned by Freektune right? He's a solid tuner and knows his stuff. I have yet to hear of anyone having an issue with him unless it's something they caused on their end of things.

Have you tried to reach out to him to see what he thinks? Was his tuning finalized and on the last map?
Click to expand...

Okay so, first off I can build boost, almost 11lbs today on the log i took
Second yeah tuned by freek, the issue started on my v1 tune from him that id been running with no issues since early june and then the issue started and everything pointed towards a clogged cat so i bought a CPE downpipe and a retune from Freek, so currently its on a new base map (v2) from him without any revisions because I can't do a pull. The issue started on an old tune tho
And yes I have reached out to him but i still haven't heard anything back yet.
 
Awafrican said:
If only you could get the stage 0 back....oh wait there is
https://www.cobbtuning.com/maps
Click to expand...
L337TurboZ said:
Wether or not it seems redundant it would help to just reflash to that as a test procedure. Instead of focusing on the level of boost you're trying to target, focus on the other issues that your car is currently displaying.

Low compression, lean conditions, failure to build boost. It sounds like a mess. Personally I think your motor is shot.

If you can't build compression you can't get the turbo to spool properly. It just won't happen. The turbo is reliant on the ability for the engine to push air out. If a cylinder can't compress the air then it's essentially not working. Even during a cruising condition you could drive it relatively ok with low compression but not have enough to make power.

There is also the tune factor. Your WGDC could be messed up. You said you were tuned by Freektune right? He's a solid tuner and knows his stuff. I have yet to hear of anyone having an issue with him unless it's something they caused on their end of things.

Have you tried to reach out to him to see what he thinks? Was his tuning finalized and on the last map?
Click to expand...

I can't seem to find where im supposed to download the file, i see the stage 0 but i can't download it, my only options are word and pdf
 
I was tuned by Freektune on my car and of course on the first revision you're not going to build more than probably 10-12 psi. The revisions after that slowly increase boost levels while also adding timing and other things. It's a slow drawn out process where if you had been able to be Dyno tuned live it would be done within a few hours.
 
L337TurboZ said:
I was tuned by Freektune on my car and of course on the first revision you're not going to build more than probably 10-12 psi. The revisions after that slowly increase boost levels while also adding timing and other things. It's a slow drawn out process where if you had been able to be Dyno tuned live it would be done within a few hours.
Click to expand...
That makes sense, but doesn't explain the issue. I don't see how it could be tune related considering it started on a known good tune
 
Enki said:
Well this is clearly not a stock 2.5" intake. Try flashing an OTS for a 3" intake.
Click to expand...

So I went Stage 1+sf issue still persists
Then i went to a gas station dumped some fuel system cleaner in the tank, and put 15L of 91
At the same time I flashed my old tune from Freek and my AFR seem to be much better now but fuel trims are also much higher, issue still persists

Log 46 is Stage 1
Log 47 is old freektune
 

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