long technical problem please help!!!

[minabdalla]

ok so here is the story. it all happened when i had a misfire, so i tried to change the spark plugs and i accidently broke the T fit that everybody else break so i fix that i also perform the TB coolant by pass, but the misfire still happened so i took it to the dealer to avoid me breaking anything else. and they changed my ignition coils and it seems fined.. but a couple weeks later i am getting a P2179 DTC code. i took it back to the dealer and they are "thinking" its the fuel pump. but i dont want to pay 1000 dollars to get my fuel pump changed if thats not the cause. so i started looking online and they said it could be a leak but i double checked every hose and it seemed fine, i also checked my MAF sensor and its kinda dirty but not crazy dirty. but wat scares me is inside the intake tube there is dirt and last time i cleaned my CAI filter was in jan of last yr (about 13 month ago) so it cant b that dirty in a matter of a yr? so i really dont know what happening. i have the freeze data:

fuel system 1 and 2: closed loop control using oxygen sensor-normal
Load: 69.8%
collant temp: 91 degrees C
Short trim bank 1 fuel: 10.94% rich
Long bank 1: 20.311 rich
Short bank 2: 21.09 rich
long bank 2: 20.31 rich
engine speed: 2414 RPM
cehicle speed: 29mph
ignition timing advance cycle #1: 25 degrees advance
intake air temp: 37 degrees C
MAF: 30.93 g/s or 5.4 lbs/min
Absolute throttle position 29.8%

PLEASE HELP

 

[Toptech]

You may want to start with the "kinda dirty MAF". These things are super sensitive and any amount of dirt/over oiled air filter will create a problem.

 

[zinger002]

Can you elaborate on these?


Long bank 1: 20.311 rich
Short bank 2: 21.09 rich
long bank 2: 20.31 rich

your short term fuel trims are really high. i can only imagine your long terms are worse...

 

[04gixx6]

You may want to start with the "kinda dirty MAF". These things are super sensitive and any amount of dirt/over oiled air filter will create a problem.

Yup, start with the cheapest fix first. Here is the stuff to get for the MAF. You can find it any local auto parts store. From what I hear the MAF is pretty sensitive, so to use anything but the actual MAF sensor cleaner is risky. https://www.amazon.com/dp/ (commissions earned)

 

[minabdalla]

ok so i cleaned the MAF sensor and i check for vacuum leaks by spraying all the connections w/ igntion starter and no increase w/ rpm. for those values those are the fuel trim values.
Short trim bank 1 fuel: 10.94% rich
Long trim fuel bank 1: 20.311 rich
Short trim fuel bank 2: 21.09 rich
long trim fuel bank 2: 20.31 rich

and the problem is still happening, same OBD

 

[FORZDA 1]

You still have vacuum leak somewhere. You may have torn the accordion section of intake hose....

 

[minabdalla]

i dont have an accordion, its an injen CAI. and i checked and sprayed the spray in every joint and there is no increase of rpm. any more ideas?

 

[FORZDA 1]

.... i checked and sprayed the spray in every joint and there is no increase of rpm. any more ideas?

Yeah, you need to remove and check all the connections for leaks under load/motion. Spraying s*** only works with a big leak at idle....

 

[minabdalla]

i checked all the hoses, where exactly do u want to check, i checked all 3 vacumm hoses and the intake. did someone say anything about the fuel trim

 

[FORZDA 1]

i checked all the hoses, where exactly do u want to check, i checked all 3 vacumm hoses and the intake. did someone say anything about the fuel trim

Look, your fuel trims are all way positive meaning the ECU is adding fuel to compensate for excess air getting in that is NOT measured by the MAF sensor, OR you fubared the MAF sensor itself. No one can point you to where you screwed up because there are simply too many opportunities for the ignorant. YOU must retrace everything you did and fix whatever you screwed up. Simple as that. If you can't figure it out, then hopefully you have the money to pay someone to help out. I recommend you don't attempt to work on your car alone.....

 

[minabdalla]

so what exactly do u want me to try? i admit i am an idiot but everybody starts from somewhere. can the injen be causing this CEL? no other answer but a leak?

 

[FORZDA 1]

Ok, the P2179 code says that the Bank 2 is lean OFF idle. Bank 2 are the 3 cylinders closest to the firewall. You MAY have a loose spark plug on that bank; a leaking manifold gasket on one or more of those 3 cylinders; a cracked manifold or vacuum line or fitting; or a remote, but possible fault is the right bank front O2 sensor. I could tell you more, but I would need to see the engine data real-time to watch the O2 sensor cycles and the fuel trim activity over a short time. If you just drive the s*** out of it @ WOT for a while, the problem should become bad enough to set another code to indicate the root problem, or at least provide more data points for troubleshooting your problem from here.

 

[minabdalla]

Ok, the P2179 code says that the Bank 2 is lean OFF idle. Bank 2 are the 3 cylinders closest to the firewall. You MAY have a loose spark plug on that bank; a leaking manifold gasket on one or more of those 3 cylinders; a cracked manifold or vacuum line or fitting; or a remote, but possible fault is the right bank front O2 sensor. I could tell you more, but I would need to see the engine data real-time to watch the O2 sensor cycles and the fuel trim activity over a short time. If you just drive the s*** out of it @ WOT for a while, the problem should become bad enough to set another code to indicate the root problem, or at least provide more data points for troubleshooting your problem from here.

ok so the the firewall is the back, so there is air getting in the back 3 cylindars, those are the ones underneath the manifold right? which data do you need and i can get them to you. any help would b apperiated? how do u want me to check for leaks?

 

[FORZDA 1]

ok so the the firewall is the back, so there is air getting in the back 3 cylindars, those are the ones underneath the manifold right? which data do you need and i can get them to you. any help would b apperiated? how do u want me to check for leaks?

You need to thoroughly inspect the things I've listed. There is no magic way to check for leaks... maybe you broke more than you thought. Dude, just get under the hood and LOOK. Put a wrench on the spark plugs, the manifold bolts, etc....

 

[FORZDA 1]

Maybe you can record a graph log of all 4 O2 sensors and fuel trims while driving as well. Not a single screen shot of a data point, but a graph of the data over a minute or so....

 

[minabdalla]

do you have a program that provides graphs, mines just shows data. and i will tighten all the bolts

 

[FORZDA 1]

do you have a program that provides graphs, mines just shows data. and i will tighten all the bolts

Not that you can use without my hardware. You can download a version from Harrison R&D here http://www.obdscan.net/index.htm, but you will need the hardware

 

[minabdalla]

so i couldnt get u a graph but i got u points, i also noticed that my throttle possiton goes from 12.9 to 75 is that normal?

 

[FORZDA 1]

so i couldnt get u a graph but i got u points, i also noticed that my throttle possiton goes from 12.9 to 75 is that normal?

You DEFINITELY have a leak somewhere near that right bank. The O2 sensors apprear to be working fine. Where does the PCV valve connect to the manifold/vacuum source? You MAY have a leaking PCV valve or cracked the hose if the dealer goons touched it.....

 

[minabdalla]

where is the pcv valve?