New LNF! Few minor issues and questions
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From: Rochester, MI
New LNF! Few minor issues and questions
So got my 09 LNF the other day! Super stoked coming from a 2.7 E85 LSJ. What a difference. I will agree LNF>LSJ. So far it's been great. Main thing that I like is the build quality is way better and the whole car just feels better. Only a few minor issues I've found so far. All else seems good.
So first issue.
My Brembo on the right side (I think) has a weird squeak when NOT on the peddle, hit the peddle and it goes away. Pads seem good. The brake pedal also feels soft I can feel the booster pushes more fluid while I'm driving so I'm assuming that is low and may be causing it. I also have a wobble when braking but I'm pretty sure that's just the rotors and could also be caused by the low fluid as well. Changing the fluid's tomorrow.
I have a weird boost issue sometimes too, but after some driving it only occurs under 55ish degrees. P0101 and pictures included. Not sure who tuned or any history on the tune. I suddenly will only be able to make 2-3lbs until I either clear the code or turn the car off and on. Only has happened when it's been under 60 degrees. Car is tuned at roughly 22PSI. Mods are, Hahn CAI, MPX Intercooler, Catless DP. No GMS1 Sensors.
Other than that car seems great. Steering is awesome compared to the LSJ too.
Car has 110,000 on the body and 40,000 on the engine. So far it's awesome.
Pics for the MAF issue. Thanks guys. Very pleased with the upgrade.
So first issue.
My Brembo on the right side (I think) has a weird squeak when NOT on the peddle, hit the peddle and it goes away. Pads seem good. The brake pedal also feels soft I can feel the booster pushes more fluid while I'm driving so I'm assuming that is low and may be causing it. I also have a wobble when braking but I'm pretty sure that's just the rotors and could also be caused by the low fluid as well. Changing the fluid's tomorrow.
I have a weird boost issue sometimes too, but after some driving it only occurs under 55ish degrees. P0101 and pictures included. Not sure who tuned or any history on the tune. I suddenly will only be able to make 2-3lbs until I either clear the code or turn the car off and on. Only has happened when it's been under 60 degrees. Car is tuned at roughly 22PSI. Mods are, Hahn CAI, MPX Intercooler, Catless DP. No GMS1 Sensors.
Other than that car seems great. Steering is awesome compared to the LSJ too.
Car has 110,000 on the body and 40,000 on the engine. So far it's awesome.
Pics for the MAF issue. Thanks guys. Very pleased with the upgrade.
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Joined: 07-16-13
Posts: 93
Likes: 6
From: Metro Detroit
I'll start with a disclaimer: I am relatively new to LNFs and engine tuning, and i've never had this problem, but i'll give it a shot anyway.
The thing that sticks out to me is the LTFT, long term fuel trim, at -21%.
That means that the primary O2 sensor sees way more fuel in the exhaust (actually lack of oxygen) than the computer things its getting. So MAF thinks a log of air is going in, O2 sensor is correcting that by removing 21% of the fuel, THAT IS HUGE, it should be 0, or very low, my stock car had like 2% LTFT.
Possible causes:
1) the car was not tuned for the aftermarket CAI. It appears these cars are sensitive, since you changed the intake, now the MAF can't correctly interpret the amount of air it took in. This can be tuned for, or revert to stock intake.
2) Boost leak? IF you drive around for a while and stay out of boost, then additional air is going into the engine that is not metered by the MAF, therefore your LTFT should be very high on the positive side. IF you drive in boost all the time, then the presurized air is escaping outside instead of going into the engine therefore your LTFT would be very low. I dont think this is what's happening but it's possible.
3) Bad MAF? I've never had one go bad, but it happens, maybe it just broke.
The thing that sticks out to me is the LTFT, long term fuel trim, at -21%.
That means that the primary O2 sensor sees way more fuel in the exhaust (actually lack of oxygen) than the computer things its getting. So MAF thinks a log of air is going in, O2 sensor is correcting that by removing 21% of the fuel, THAT IS HUGE, it should be 0, or very low, my stock car had like 2% LTFT.
Possible causes:
1) the car was not tuned for the aftermarket CAI. It appears these cars are sensitive, since you changed the intake, now the MAF can't correctly interpret the amount of air it took in. This can be tuned for, or revert to stock intake.
2) Boost leak? IF you drive around for a while and stay out of boost, then additional air is going into the engine that is not metered by the MAF, therefore your LTFT should be very high on the positive side. IF you drive in boost all the time, then the presurized air is escaping outside instead of going into the engine therefore your LTFT would be very low. I dont think this is what's happening but it's possible.
3) Bad MAF? I've never had one go bad, but it happens, maybe it just broke.
It's almost always a boost leak. Start on the intake, check all connection. Check all charge pipes. Hot and Cold side.
Terminator 2 says it's almost always a boost leak. Especially if you have no other codes.
Boost Leak Test time
Terminator 2 says it's almost always a boost leak. Especially if you have no other codes.
Boost Leak Test time
That's either a nasty boost leak or that car is running trifecta Ecp tune, does it have a bov? I got trims like that when I upgraded my injectors and was on Ecp tune. Even with no boost leak
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Joined: 06-22-09
Posts: 5,989
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From: Kathmandu
Did you have the p0101 code? Do you have the OEM intercooler? Have you bottomed the front of the car recently? Did you remove the bumper cover when you did the boost leak test? Do you have the TMAP sensor with the blue and silver sticker on it? If so, what color is the o-ring?
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Joined: 03-12-11
Posts: 1,796
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From: TEXAS
As far as your brakes go it sounds like you have warped rotors which could be caused by a pad dragging. The first time I did mine I didnt clean the calipers very well and oem pads leave a lot of dust in there, enough to cause one of my pads to not fully retract ruining the pad and rotor. That one cost me a new set of pads and rotors. Moral of the story sounds like your rotors are f'd so your gonna need new pads and rotors anyway buy oem and do it yourself its easy, just remember to get some kinda brush in there and get ALL the dust out of the way
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