Mine either. 10:1 is where it would flatline. I had the gauge type AEM UEGO.

 

It's an AEM UEGO 30-2310. It's one of the ones without a gauge attached. The manual for it lists an 8.5:1 Gasoline AFR at 0.5v and 18:1AFR at 4.5v.

This guy: http://www.aemelectronics.com/Images...%2030-2310.pdf

 

I got the injectors today, but I don't think I'll have time to install them. I'll see about doing it tomorrow so I can make some progress here

 

ah, that's a completely different one than all the uegos that people here use. I haven't seen the one you have before.

 

Ok, got the RC 750s installed. No different. I can idle at 8.5:1 or not at all. It's dumped about half gallon of straight gas on my driveway just through the exhaust in maybe 3 minutes of idling. I have no idea what could be causing this. How am I running this rich with injector pulsewidths of 0.100? If the issue didn't change with new injectors, does this mean I might have a bad Haltech? Has anyone else ever seen anything like this? I can send my tune and datalog if anyone can help.


At this point I'm fully regretting buying this car; I was better off with my much older, much more modified 240sx which actually worked.

 

Are the 750's the same impedance style? Did you put in the correct latencies and flow rates? Email me your map.

double checked your plugs are not fouled out and are connected to the correct clips on the harness?

Can you post any videos?

I think the next step is to put oem injectors in and run off the stock ecu. Check the harness/pins, make sure nothing is bent.

 

so it was perfectly fine on the fcon?

if so then it's a tune issue. There might be a very very tiny chance that something is messed up with the unit. I would contact hal and send him your map and logs and see if something in the settings might bve messed up. if not he might have you send him just the unit so he can examine it. Since the car isn't working currently a week without the haltech to have it checked over wouldn't be a bad idea. I would wait for him to check the map settings first though. Sometimes settings can be off and it takes a trained eye to catch it.

 

Also, what kind of vacuum are you seeing at idle?

He bought the haltech for two reasons, car was running rich on the FCON and he wanted to correct it and the fact that the FCON is locked out from the end user.

Post some screen caps while the car is running showing what the haltech is reading.
You set the APP and TPS params right?

 

RC's are high impedance according to a quick google search. Most others are low impedance. Check that setting.

http://www.kingmotorsports.com/p-206...injectors.aspx

 

The new injectors are RC 750s, high impedance. I copied the latencies from the thread recommended to me earlier. I'll email you my current map. It's not much of a tune, more baseline settings and me adjusting the fuel map to try and make it work better. I can get a video if you think it would help, but it idles mirror smooth. I have not checked the plugs, but it's firing pretty evenly on all 6 cylinders so I am not sure there will be a huge difference. New plugs are next on the list though as I'm running out of parts to replace. I unfortunately don't have any OEM injectors to test this with.

With the Fcon, it was still idling in the mid 9s, so I can't say it was much better. Though it wasn't dumping fuel, it still had lots of fuel vapor in the exhaust and would misfire occasionally. I don't really think its an issue with the Haltech itself, but I'm just wondering why I'm seeing the same issues with the known good injectors.

I'll check the logs for idle vacuum and see if I can get some screenshots. The APP and TPS are set and the throttle seems to work without issue. What gets me is even in injection time mode with all enrichments off, I can lower the PW to very low values and see no difference until the engine just cuts out.

Emailing you the tune now.

 

I would suggest VE tuning.

Once you get down to a low enough pulse width, you can no longer control the injectors. they have latencies and response times. There is also a setting for when it injects the fuel, it can split it up into different portions.

Do you have any information on the engine? Cams, porting, headwork ect? Sorry if i missed it somewhere.

I have some OEMS i can send you. The oem harness wasnt modified for the FCON was it? Those are plug in play right?

 

Looking at logs, I'm around 40kpa at idle right now. High, but not out of control. The idle is stable at 1100 RPM

 

Also maybe flash the firmware up...

 

VE tuning is what it is currently set to. I've tried all three methods to at least make it run. MAF and lambda tuning had the best results in AFR so far, but even then it only did so much.

As far as I am aware, the engine is 100% stock block. There is a small plenum spacer, but nothing that should make a difference. I may need to check the fuel timing, I think I had either based it off the stock map that came with the Haltech or the map you sent me awhile back. The fcon is plug and play. I don't see any modifications to the harness anywhere. It too piggybacks the Nissan ECU for throttle control, etc.

 

I believe 1.10 is the latest available for this model Haltech. 1.11 wouldn't install; I think its for the standalone Haltech.

 

since you had problems before i would say the haltech has nothing to do with it. Sounds like something in the wiring or mechanical has changed.

I was going to say a stuck injector or maybe there is a problem in the wiring to hte injectors.

if you are pouring raw fuel out the exhaust then you probably have flooded the oil pan with fuel as well.

 

that's about -12inHG which is not near enough vac. My 8.5 compression with ported heads and cams pulls -16inHG and stock pulls about -22inHG

something is wrong somewhere. Vac leak

 

I'm beginning to question the injector wiring as well. I dont think the injectors are stuck open mechanically, as I've now swapped in 2 different sets with the same issue. Even if there is a vacuum leak, a MAP based system will correct for it. I should still be able to get AFRs leaner than 8, though idle would suffer.

 

vac lean can cause a lot of problems. It would be in the wrong cells in the map so it could be pushing fuel. The map would try to compensate and then maybe push too much fuel.

I wouldn't try to correct anything until correcting the first problem found (low vac). That means something is wrong somewhere and it needs to be fixed before trying to rack your brain on fixing the fueling issue.

 

Idling at 1100 rpm? Vac leak?

40kpa is only 5psi........way too low. That is like half.

Looking at your map is a bit confusing since you changed the Axis on the Fuel table.
I also see you hard coded the ignition timing at idle at 20. I let the ECU control that but I have bc stage 2 cams on my intake.


Also, were the injectors rated at 3bar or 3.5bar?
Stock fuel pressure is about 3.5bar which effects the flow rate.