Well im still having this problem of the car dying out when i come to a stop. The injectors just get flooded and I cant start it back up. New plugs in, could this be due to a bad knock sensor, i know my o2 in the b pipe is broken and I have a new one sitting here next to me but I cant see how that would effect it any. Did a compression check everything was between 165-170 so thats good to know. I cant fogure out what it is, can it be a bad fuel pump?, but if it was a bad fuel pump could it be pumping too much fuel into the injectors? Could one of the injectors be broken and is flooding the engine, is that even possible? Im running out of ideas here and this problem is really really begginging to **** mee off because I know its something most likley really simple. If you guys want video of what im talking about i can grab a shot tomorrow and show u exactly what i mean.

 

Is your BOV located before or after the MAF? Is it atmospheric or recirculating? Does it stall out after you let off the gas after accelerating?

What's your base/idle fuel pressure?

 

What is your base fp?

 

BOV is located before the maf, it is atmospheric, well before it was doing it when i would let go off the accelerator and the rps would drop to like 2-300 and it would die out, now it actually does it when im just idling, i dont know what my base fp is because i dont have a gauge, but this all started like 3-4 weeks ago and ive had the car since november like this.......

 

put your new 02 sensor in and watch the problem go away. I think any way, Im not sure if the b pipe sensor affects AFR when it goes bad.

~Alex

 

It's not the O2 sensor. I didn't even HAVE a rear O2 sensor in my black all motor car, and obviously the performance of that one wasn't affected.

 

Get an adjustable FPR and I bet your problems will be fixed.

You can also get a cheap little guage that goes on the unit to adjust fuel pressure at idle

-matt

 

I had 400 cc injectors @40 psi at idle and they never flooded when I came to a stop.

Does it happen when you let off the gas? like going ~30 and let off gas and put car in N

 

yes bags it does

 

I have a feeling it is the vaccum lines going to the IACV. I experimented with this earlier this week and when I moved the MAF after the BOV and plugged the lines so much fuel would dump into the motor that it would cough and sputter when I was giving it gas, then if it fell below 1000 rpms it would die. Then I would have to pull the soaked plugs and wait an hour to try anything. Check the small line heading to he IACV, that might do it.
Choray

 

Sounds like a vacuum leak. Look for small pinholes or replace it all with some heavier silicone.

 

now what lines am i actually lookiong for? I will check teh IACV lines but what else, or am i just in general cheking all the lines on the mevi to make sure theres no leaks?

 

I didn't know you had a MEVI. That is something I know nothing about. I've only seen one in person, and it was a fuster cluck. A vaccum leak will defently cause the problem. With out having the car in front of me there is no telling where it could be.
Keep us posted
Choray

 

Yeah ima check the car out in the morning and see wtf is up with it, its just this is so frustrating over something thats probably so stupid and simple.

 

I had the same problem and the vacuum line that went to the evap solenoid had a pinhole in it.

 

1) Go to your local parts shop
2) Buy a $10 vacuum gauge
3) Verify the vacuum problem ( < 15-17Hg = bad)
4) Find the leak by spraying carb cleaner around vacuum lines and where the MEVI meets the engine.

 

Is the vaccum reading on your EBC any different than the past?


A bad o2 could be an issue with your set up. Since your not exactly controlling the 555's perfectly, the o2 sensors on my set up are barely able to keep AFR's close to stoich. If one was bad it was cause problems. Try putting your JWT ECU back in and see what happens

 

I did uput the jwt back in but same problem, vacuum reads steady 17-18 and nothign chanched on the ebc mike still shows -99

 

Ok, rules out my theory.


Start the hunt for a vacuum leak.

 

So I came on across something with my problem, its still happening btw, after teh car dies and stalls out and I try to start it again for 5 min and it doesnt and my battery dies lol I opened my hood and there is a very strong gas odor coming from my engine bay. I checked for gas leaks but cant see anything of that sort, can this be the answer to why im running so rich? HHMM also on the vaccuum gauge, i noticed that when my rpms drop to like 3-400 the vaccuum goes to like 14-13 so this does indicate that there is a vaccuum leak present somewhere in the car.

 

Try taking out your fuel pump fuse and see if the car will start, if it does, one of your injectors is leaking..I had the same problem..Your best bet if you want to rule out a fuel problem is to get a fuel gauge and see if your fuel pressure stays the same when you turn off the car...because it should keep pressure..

 

he has a bad rear o2, mike. The useless O2.