My Build Thread

[1.5]

So I will be tackling the first stage in my Blitz install tomorrow.

Not sure how I will be approaching it or what I am in for so anybody can chime in or come give me a hand lol

I will be installing AEM FIC, AEM wideband, and boost gauge, and a new intake (that I got lol)

[mr_miles]

damn...I'd totally help if i could lol.

[1.5]

LoL i appreciate it man

[1.5]

Got some beer today



Wait a minute....

[1.5]

Running into some problems during install. I am so uneducated when it comes to wiring and need some one to help point me in the right direction.

I am trying to install my AEM wideband A/F gauge and am able to get it wired up and running but I think I am doing it wrong as I am reading extremely lean and getting CEL's.

I was under the impression that the stock a/f sensor would be pulled and replaced with the AEM. However the AEM then would only plug from the sensor into the gauge and then the gauge into a power/ground source. I believe this is causing the lean/cel issue as the ecu is no longer receiving a signal from the sensor. I have been told that I most likely need to have a seperate bung welded on that I can have the AEM wired to and leave the current stock one in place. Is this correct?

This is what my setup looks like.













I also have an aem fic with a custom harness that I am going to install so can I just wire the gauge to the piggyback or is the stock sensor not going to provide the accurate readings for the AEM wideband?

[1.5]

This video shows how the gauge keeps searching and records a very lean mixture

http://s23.photobucket.com/user/Mist...75928.mp4.html

[kou]

you need the stock one in place so when you tune the FIC you can get the right readings. the car will not run right without it in there.

[1.5]

OK so a new bung it is?

[1.5]

So I unplug the battery, remove the aem equipment, put the stock a/f sensor back, plug the battery back in, and now its stalling and bogging down and idling extremely low but there is no CEL?

[Focus_Sh1ft]

Originally Posted by 1.5

So I unplug the battery, remove the aem equipment, put the stock a/f sensor back, plug the battery back in, and now its stalling and bogging down and idling extremely low but there is no CEL?

Are you sure you don't have a vacuum/exhaust leak? Also, give the ecu a few minutes to relearn short term fuel trims when you reconnect the battery.

Assuming a stock fuel system, the car will run normally (maybe slightly lean, and will throw a P0031 code) with the front O2 sensor removed.

How are you planning on tuning? Open or closed loop?

[1.5]

I never had any leak before and I'm still NA this was to prepare for my s/c. When the front sensor was replaced with the aem yes it gave me that lean code. Now that everything is back to stock there is no code but that sputtering and stalling. Can I drive it like that? Will the ecu relearn with the car off or does the ignition need to be on?

[Focus_Sh1ft]

The car needs to be running to receive feedback from the O2 sensors. You could try driving the car as is and seeing if it corrects itself, but I'm doubtful.

Do you have a code reader? Being able to read the fuel trims would be pretty beneficial also. Since you're planning on installing a Blitz, I'd recommend x10000000 to go out and buy an OBDII scanner.

[1.5]

I do have one that's how I've been reading the codes this far but again there is no CEL anymore the car is just sputtering, bogging, and stalling. It sounds like I just cammed it lol If it needs to be on then I guess I'm gonna go through my morning commute and hope that does the trick. Ill see what readings I get for a/f now.

[ilikerice]

Try disconnecting everything again. disconnect the battery and ecu just for shits and giggles. take a shower and come back. double check your connections. plug it back in. go make a sandwich, or wait 5 mins. then start the car again. just let it idle for 10-15 mins. Drive it around the block. drive it easy, dont go crazy. Then after that, go crazy. floor it a couple times. see if this helps

[1.5]

So this morning I had to come to work so I fired it up and again the bogging/stalling happens. I cant let it sit and idle because within seconds it stalls out, I have to keep gassing it. As I drive to work I notice slight improvements. The idle still gets super low, down to ~500 at times but then it spikes back up to ~1300 sometimes and it no longer stalls but the idle fluctuates between those points.

This screen shot shows my readings at idle once everything leveled off and stopped stalling out. Again the rpms still go as low as 500 and as high as 1300 bouncing around between those points but at least no stall outs.



This shot shows my readings under some heavier load



As stated before my car displays no codes however I decided to pull the log anyways and this is what I find. How the hell are cylinders misfiring now? I never touched them. Fuel line isnt kinked or anything.

[Focus_Sh1ft]

I hate to sound redundant but... You almost certainly have a vacuum leak if you're misfiring on multiple cylinders and throwing P0171. Further, you're going to run lean under idle and have less issues while cruising. What are your vacuum readings while the engine is bogging?

If you have an in with a mechanic, try having them smoke test your intake. I'm sure the problem will pop up pretty quickly.

The problem could also be on the exhaust side, since that's where you were working more recently... If you have fresh air getting into the exhaust, it will also cause the O2 sensor to read leaner than normal. If you took the header off recently, did you remember to put the donut gasket back?

[1.5]

under idle while the engine is stuttering it reads ~20-23 in/Hg

I havn't messed with the header since install like a year ago. The gasket is there yes.

I did remove the intake air filter yesterday but Im sure its on securely, Ill double check it.

[1.5]

Just went out to the car and unplugged the battery again, gonna let it sit for a long time this time. I did also notice the tinniest gap between air filter/tubing so i repositioned it and tightened it down. Let's see...