[Saif2018]

Originally Posted by Mgb1124

Yeah that is the video I watched and his post cat sensor voltages were pretty solid around 0.42

Have you checked yours?

[Mgb1124]

Originally Posted by Saif2018

Have you checked yours?

Yes mine were bouncing from around 0.07 to 0.86 but separate from eachother but they are both staying within the green you can see in the video I posted so I'm thinking maybe that's causing it but I'm not sure how the sensors could be bad so soon

[TSilver335i]

Originally Posted by Mgb1124

Do these post cat oxygen sensor voltages look ok

Catalyst diagnostic routine - all looks normal

here's mine https://www.youtube.com/watch?v=WvUExRYNkuU

[Mgb1124]

Originally Posted by TSilver335i

Catalyst diagnostic routine - all looks normal

here's mine https://www.youtube.com/watch?v=WvUExRYNkuU

I'm lost on what could be the problem then

[TSilver335i]

Originally Posted by Mgb1124

I'm lost on what could be the problem then

I'd try clearing all codes and adaption mixtures with INPA. I don't think MHD clears all of the adaptions correctly at least in my experience.

[Saif2018]

Have you pulled your Plugs/Injectors and inspected them for leaks?

https://datazap.me/u/mgb1124/mixture...-23&zoom=0-108

AFRs not shooting upto 234 straight away, once you go off throttle. Bank 1 seems to be taking its sweet time too.

[Mgb1124]

Originally Posted by Saif2018

Have you pulled your Plugs/Injectors and inspected them for leaks?

Yes I had cyl 5 injector leaking so I pulled all injectors and checked for leaks luckily it was just one and since then I have checked my plugs many times and they have been dry and no smell of fuel

[Saif2018]

Originally Posted by Mgb1124

Yes I had cyl 5 injector leaking so I pulled all injectors and checked for leaks luckily it was just one and since then I have checked my plugs many times and they have been dry and no smell of fuel

This is strange, from what I understand AFR's should shoot straight up to 234, if it doesn't could indicate leaking injectors.

I don't have ISTA but was wondering if Injector smooth running test would help diagnose. Hopefully MHD or someone more knowledgeable can help.

[Mgb1124]

Originally Posted by Saif2018

This is strange, from what I understand AFR's should shoot straight up to 234, if it doesn't could indicate leaking injectors.

I don't have ISTA but was wondering if Injector smooth running test would help diagnose. Hopefully MHD or someone more knowledgeable can help.

Yeah it's weird but looking at some past logs they seem to shoot up to 234 but sometimes bank 1 doesn't go as high, what is injector smooth running test

[studio54]

yeah from the last log, AFR are weird, won't shoot up to 234 on let off which is really weird, not only one bank, but both banks

[Saif2018]

Originally Posted by Mgb1124

Yeah it's weird but looking at some past logs they seem to shoot up to 234 but sometimes bank 1 doesn't go as high, what is injector smooth running test

Do a YouTube search should be guide somewhere on how to run it, what it does.

[Mgb1124]

Originally Posted by studio54

yeah from the last log, AFR are weird, won't shoot up to 234 on let off which is really weird, not only one bank, but both banks

Yeah I don't know if maybe that's because I switched to v8 because the log I did before that on v10 it shot all the way up

[studio54]

Originally Posted by Mgb1124

Yeah I don't know if maybe that's because I switched to v8 because the log I did before that on v10 it shot all the way up

How old are your plug & coil?

Your injectors are new ok, but maybe your plug&coil need renewing.

[Mgb1124]

Originally Posted by studio54

How old are your plug & coil?

Your injectors are new ok, but maybe your plug&coil need renewing.

I just changed them about 2k miles ago

[studio54]

Originally Posted by Mgb1124

I just changed them about 2k miles ago

Ok bro, so I don't know honnestly Honnestly I don't think it's tune related, where did you buy your injectors ? I hope they are fine or otherwise I don't know what's going on.

[Mgb1124]

Originally Posted by studio54

Ok bro, so I don't know honnestly Honnestly I don't think it's tune related, where did you buy your injectors ? I hope they are fine or otherwise I don't know what's going on.

The car had all index 12s except it had index 7 and 9 in cyl 1 and 2 when I got it about 2 years ago so I got 2 new ones on fcp euro over a year ago and for the cyl 5 that I had leaking within the past 5k miles I bought a used index 12 because everywhere was on back order but I did test it for leaks beforehand and it was good so I'm not sure

[studio54]

Originally Posted by Mgb1124

The car had all index 12s except it had index 7 and 9 in cyl 1 and 2 when I got it about 2 years ago so I got 2 new ones on fcp euro over a year ago and for the cyl 5 that I had leaking within the past 5k miles I bought a used index 12 because everywhere was on back order but I did test it for leaks beforehand and it was good so I'm not sure

You can check them with pull out plugs and smell/wet method....

Or test your injectors with the method I exposed on the other tread, just remove the fuel pump fuse (check layout card), and let the car sit overnight for or a few hour, and log the rail pressure psi (and lpfp pressure) and report value in PSI.

[Mgb1124]

Originally Posted by studio54

You can check them with pull out plugs and smell/wet method....

Or test your injectors with the method I exposed on the other tread, just remove the fuel pump fuse (check layout card), and let the car sit overnight for or a few hour, and log the rail pressure psi (and lpfp pressure) and report value in PSI.

I've checked by pulling the plugs out many times and they have been dry and no fuel smell whatsoever I also checked the injectors for leaks by having them hooked onto the fuel rail reversed and disconnected

[studio54]

Well, just some suspicions...

If you get "lean" codes, it means that front o2 sensors measure too much air right ?

If everything is right (injectors, plugs, coil)...

Either your o2 sensors are not good, and out of specs, or....
Maybe your exhaust manifold isn't tight as it should be and there is a leak somewhere that add air. (but would mean it's not 100% tight are the very begginning of the exhaust, or downpipes like against the engine, exhaust manifold)

O2 sensors are in the downpipes.

[Mgb1124]

Originally Posted by studio54

Well, just some suspicions...

If you get "lean" codes, it means that front o2 sensors measure too much air right ?

If everything is right (injectors, plugs, coil)...

Either your o2 sensors are not good, and out of specs, or....
Maybe your exhaust manifold isn't tight as it should be and there is a leak somewhere that add air. (but would mean it's not 100% tight are the very begginning of the exhaust, like against the engine, exhaust manifold)

Yeah at this point I'm thinking it's either of those I did have my o2 sensors changed about a year ago when I installed catless downpipes but it's been less than 10k miles since then but i did have exhaust leak problems multiple times since then that I had to have fixed and downpipe gaskets changed but maybe that's the issue sometimes I can hear what sounds like an exhaust leak come from near the downpipe area when I start the car

[studio54]

Originally Posted by Mgb1124

Yeah at this point I'm thinking it's either of those I did have my o2 sensors changed about a year ago when I installed catless downpipes but it's been less than 10k miles since then but i did have exhaust leak problems multiple times since then that I had to have fixed and downpipe gaskets changed but maybe that's the issue sometimes I can hear what sounds like an exhaust leak come from near the downpipe area when I start the car

If you changed your o2 sensors with OEM, I can't see a problem with them (but who knows) but it does not mean that there isn't an exhaust leak maybe, at the downpipe V band or at the manifold for example that add some air in the mixture....

[Mgb1124]

Originally Posted by studio54

If you changed your o2 sensors with OEM, I can't see a problem with them (but who knows) but it does not mean that there isn't an exhaust leak maybe, at the downpipe V band or at the manifold for example that add some air in the mixture....

The o2 sensors are bosch oem but I might just change them anyway if when I bring it to a shop if they don't find any exhaust leaks because I don't see what else it could possibly be but I'm betting on exhaust leak