-25 stft at idle

[Daymon159]

Can anyone please look at some data logs and try and point me in the right direction of what to do to fix this issue... Some reason can't attached it to this post?

At idle it's -25 stft and -10 ltft with a 9.x to 10.x Afr

Light throttle is also -25 stft. Can hit full boost still, closer to 50% throttle stft goes now to -10 and then 0% at closed loop? Or is it open loop I can't remember lmao.
But on decell the car is popping and pulling timing and is still reading 10.x to 13.x Afr jumping around.

I'm getting very worried it's injectors going out.
The issue did pop the p0172 rich code, but a reflash fixed it for a few days. Then it came back. Cleaned the filter and reflashed and it ran perfect.. like better then perfect.
Week later it's running -25 stft all over again.

Please any help would be awesome. The car is almost undriveable

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[madchiller]

state what tune you are using or if it's a custom tune.

 

[hobby-man]

If you're tuned, it's probably a race MAF tune on a stock intake. If you're not, it may be injectors.

 

[Daymon159]

Ktuner 21psi base tune.
And street maf under the hood and tune.

 

[hobby-man]

Damn. Pretty likely it's injectors. You could check to see if any hoses or clamps popped off but if you haven't been poking around in there that's unlikely.

 

[Daymon159]

Damn. Pretty likely it's injectors. You could check to see if any hoses or clamps popped off but if you haven't been poking around in there that's unlikely.

Any idea what that runs people to replace?/time?
Is there any point on doing plugs at the same time?

 

[Gherbo23]

could be a boost leak somewhere along the line. I had crazy negative trims similar to yours and ended up being a tiny boost leak.

 

[Daymon159]

Damn. Pretty likely it's injectors. You could check to see if any hoses or clamps popped off but if you haven't been poking around in there that's unlikely.

Any idea what that runs people to replace?/time?
Is there any point on doing plugs at the same time?

could be a boost leak somewhere along the line. I had crazy negative trims similar to yours and ended up being a tiny boost leak.

Ya I wanna get it boostleak tested as well. Did you do yours your self?
Where did you find the leak?

 

[Daymon159]

Update..

Started the car today. P016b code poped up. Any ideas?

 

[madchiller]

Update..

Started the car today. P016b code poped up. Any ideas?

wanted to preface this with im not a mechanic but i did sleep on the couch last night.

check your fuel pump to ensure it's priming the system (there is a recall for fuel pumps in some models starting in May so check your VIN). maybe check your spark plugs for bright white-bluish color to see if you're running a lean which goes back to the fuel pump.

 

[Daymon159]

Fuel pressure looks fine, target vs actual.
Pulse with seams normal.
The issue is the car is running crazy rich, not lean, might be pulling the plugs today to look at them and replace them with new ones

 

[gtman]

Have you cleaned your MAF like I suggested in my reply to the private message you sent me?

Clean MAF
Check plugs
Check injectors

 

[Daymon159]

Have you cleaned your MAF like I suggested in my reply to the private message you sent me?

Clean MAF
Check plugs
Check injectors

Maf is now cleaned. About to take the car out and see how it is.
Still on factory tune haven't reflashed the tune yet.
Tomroow I pick up new plugs(asummimg carquest ordered me the right ones)
And will replace them once this rain here stops. After plugs I'll do wideband o2 followed by injecters!

 

[gtman]

Never assume.

 

[Gotch]

Run some fuel system cleaner through on your next fill-up (also make sure to use premium gas).

Gumout with Regane, Royal Purple Max Atomizer, etc...Can be purchased at Canadian Tire.

See if that helps. I had to change my injectors around 76k (IIRC)

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