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Old 11-17-2019, 05:22 PM   #1
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FIXED: Installed Edelbrock SC. Now car is throwing CELs

So I installed an Edelbrock SC last week and everything was going great until I started getting these CELs: P0171, P117B, and P1170. I've checked all the wiring for the injectors and they seem connected tightly and are clocked correctly as well.

I'm running the CARB tune from Edelbrock but I do have a catless Gruppe-S header (while waiting for my local tuner to give me an appointment for a custom tune). I'm not sure if that is making the system throw these codes. There's a chance its related by the looks of this thread (post #4): http://www.ft86club.com/forums/showthread.php?p=1618213

The only other thing I can think of is a bad battery (according to post #14 on this thread: http://www.ft86club.com/forums/showthread.php?p=2128963). I've had to jump my car several times over the last month, and have had it go completely dead about 3 to 4 times as well due to my fault but I've also fully charged it with nothing connected at least 2 times over the last week. These codes keep coming back though. I'm getting a new battery in a few hours to see if that fixes anything though.

Interesting to note though: car still drives completely fine. I haven't smelled any gas or anything sitting in the car. CELs also don't happen while driving (after clearing it), and all 3 times it has happened I had just gotten into the car and turned it on and was idling waiting for things to warm up.

Any idea on what this might be would be super appreciated

EDIT: Went to buy a battery and monitored LTFT and STFT. LTFT was basically 40% any time I went near the throttle. STFT was mostly 0 but ranged between -5 to +11. I'm now leaning towards this tune really not liking the catless header. At idle, LTFT is 18.8 and STFT is 0.

Edit: Datalog: https://datazap.me/u/rb28dett/nov-17-cruise

FIXED: https://www.ft86club.com/forums/show...5&postcount=79

Last edited by localhost; 01-30-2020 at 01:51 PM. Reason: fixed the issue
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Old 11-17-2019, 05:30 PM   #2
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Did you make sure every bolt is tight for the DI bracket? I would double check them
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Old 11-17-2019, 05:43 PM   #3
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Did you make sure every bolt is tight for the DI bracket? I would double check them
Sorry I'm not sure which bracket you're referring to. If you mean the entire fuel rail assembly with the injectors to the manifold, then yes. I torqued them down to 10 ft-lbs like the instruction manual said.
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Old 11-17-2019, 05:49 PM   #4
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How is this a warranty or recall/tsb related issue?
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Old 11-17-2019, 05:50 PM   #5
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Sorry I'm not sure which bracket you're referring to. If you mean the entire fuel rail assembly with the injectors to the manifold, then yes. I torqued them down to 10 ft-lbs like the instruction manual said.
If you're standing in front of the car, it's the black steel bracket that the direct injection ecu bolts to on the left side. I'm sure you were thorough, it's just something to double check as it's not an uncommon issue after having removed the intake plenum to install a supercharger
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Old 11-17-2019, 05:51 PM   #6
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How is this a warranty or recall/tsb related issue?
Ah crap. I clicked on the wrong forum. Totally my bad
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Old 11-17-2019, 05:53 PM   #7
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Originally Posted by DarkPira7e View Post
If you're standing in front of the car, it's the black steel bracket that the direct injection ecu bolts to on the left side. I'm sure you were thorough, it's just something to double check as it's not an uncommon issue after having removed the intake plenum to install a supercharger
Ah gotcha. I will double check this because one of the coolant hoses from the SC assembly does sit on top of that bracket and at one point before installing did cause one of those 4 connectors to come loose.
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Old 11-17-2019, 06:22 PM   #8
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I double checked the bracket and it was tight. No movement at all. The connectors on the back were all also completely seated and locked in place.

Connectors: https://i.imgur.com/VRWgCsM.jpg

Bracket: https://i.imgur.com/FmrgCLO.jpg
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Old 11-17-2019, 06:31 PM   #9
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How is this a warranty or recall/tsb related issue?
Issues | Warranty | Recalls / TSB
Well it is an "issue".
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Old 11-17-2019, 08:20 PM   #10
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I'm battling the exact same codes as you for the past 3 months. Tightened DI bracket and everything. I have the Sprintex SC though. Codes come back about 2-3 days of driving after clearing it.
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Old 11-17-2019, 08:53 PM   #11
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Exhaust leak or a hose blown off of the intake manifold.
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Old 11-17-2019, 09:02 PM   #12
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Exhaust leak or a hose blown off of the intake manifold.
Could you also see similar symptoms with an aftermarket header with a tune designed for a stock one, or is it purely because of a loose intake/exhaust leak?
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Old 11-17-2019, 09:07 PM   #13
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Could you also see similar symptoms with an aftermarket header with a tune designed for a stock one, or is it purely because of a loose intake/exhaust leak?
I don't know but a good test would be to reinstall the stock header. You have the ecutek tools, right?
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Old 11-17-2019, 09:15 PM   #14
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I don't know but a good test would be to reinstall the stock header. You have the ecutek tools, right?
Yeah, definitely going back to the stock header is a good test - just a real pain haha. And yes, I do have the Ecutek cable and software.

I've emailed my local tuner to see if they can fit me in since I'm fairly certain it just needs to be custom tuned to compensate for the header but I'm not sure if they even do any tuning in the winter.
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