[QUOTE=32krazy!;758939]Honestly dont know if the gauge is bad. I am going by research done online. I dont know how to check if its bad. I have described to others what gauge is doing they say its bad.

 

[QUOTE=austinbarrylee;758940]tests for power at the sensor. test for power at the gauge. if theres power then the gauge is bad or the O2 sensor is bad. if theres no power then you have other issues

 

Jessie, it is curious that with your mods you would run rich while most folks have a lean issue. If you do not have obdii capability tied into your Zietronix setup, I would suggest buying an inexpensive scanner to check a few basic parameters. Using obdii instead of dedicated sensors will show you what the ecu is seeing. Looking at your ltfts would tell you if you have a faulty injector. Also a very low/high ect signal

 

Stupid phone!!!!! Sorry. Could change your mixture. A fuel pressure test would then be in order ( very easy to do). If these things check out then I would contact Eurocharged for a regime. You must rule out any problems first before retuning.

 

Regime lol spellcheck sucks!!!!!

 

[QUOTE=32krazy!;758939]Thanks for the feedback. I guess I will need to get things leaned out a bit during open loop, didn't realize that too rich is also a problem.

Thank you again. From what I read the DashDaq plugs into the zt-2 brain so even if I install it to help log IAT's, would it see what the ECU is seeing to help with checking LTFT and STFT? It does give an exact number on ECT in addition to IAT. Or should I just go with an obdii scanner that can read the LTFT? Would a faulty injector still run AFR's at 14.7 during closed loop? Looking at my data logs from crusing and idling speeds the AFR stays consistent at 14.7. It is strange that I am running so rich with open loop, something is going on.

 

I realized I'm an idiot, I posted without quoting who I was posting to.... I didn't pay attention to the the fact that Austin hijacked the thread lol.

Jesse: you have way to much fuel or a timing issue it appears...hard to say without looking at your tune. It looks like you need to pull some fuel as has been stated already but without seeing what your car is running for timing it's hard to say exactually.

Austin: it appears you are suffering from fuel starvation, the first place to look after you verify your gauge is fuel pressure and under WOT. If the pressure drops significantly under WOT you have a weak pump and it needs to be replaced. If it doesn't then you need to see if you can add more fuel via the tune. If you add more fuel during the tune and you have the same results it's time to look at injectors. If you have to replace the stock injectors you might as well put larger ones in. The stock injectors are don't give you much room to play with. The bigger injectors allow you to add more fuel with a lower duty cycle effectively making the injector last longer because it doesn't have to work as hard...if that makes sense.

 

Open Loop: Car is under wide open throttle or heavy throttle. This is when you want and Air/Fuel in the mid 11's to mid 12's. This is when the ECU ignores signal from the o2 sensors. Car is also in open loop when you start it up, until the o2 sensors heat up.

Closed Loop: Car is being driven under light throttle, just cruising around. This is when the ECU uses the O2 sensor signals to constantly adjust the Air/Fuel in order to reach stoich, 14.7 for gasoline.

I hope this helps clear things up. I intentionally avoided terms like tables, fuel trims, and scaling.

 

here is a link for fuel trim info

What are fuel trims all about?

 

[QUOTE=JesseJamessrt6;759021] yes the ecu could pull fuel to compensate and still hit 14.7 closed loop. Too much and you get an out of range code. If you have the dashdaq just look at the trims. A cheap code reader is a great tool to have around for quick checks.

 

I just had a similar issue but I was running lean. 14.7 was normal driving but was getting into high 13 low 14 at WOT. I upgraded to the 55 fuel pump which brought me to high 11 low to mid 12.

 

What other mods are you running with the SL55 pump.?

 

Code 3 pulley 2nd generation
Eurocharged tune
NW DCAI
NW modified intakes

I will run it again after I have put more miles on it to see how the ECU compensates.

 

None of your mods would cause you to run unusually lean.

 

Do you have any logs you could post? Need the high flow fuel filter right?

 

Yeah changed the filter too. I will post a log before and after. Can't do it at the moment.

I can't speak to whether I should be running lean or not based on those mods, just what the logs were telling me.

 

Jesse, to clarify, I replaced the fuel filter but not with the high flow. I read your reply to fast the first time.

 

Great information, thanks

 

What is your fuel pressure?

 

Silverarrow, I do not have a fuel pressure gauge installed yet unless you know of another way for me to get a reading.