View Full Version : Bogs under boost, wot
09-11-2009, 08:51 PM
Ok so This is my setup, Integra LS, 10psi, T3 turbo, Tial wastegate, 550 injectors, 255 wal fuel pump, B&M FPR, AEM ems, Aem wideband, 3In exhaust, MSD Blaster, Tuned Last year. Timing is on, FP is at 46psi, ok when I am driving and I hit it WOT once it gets up to around 5000-5500RPM full boost, 10psi, my AFR is 10.0 on the AEM wideband it seems to bog/pop like it is either not getting gas (although you can see it on the gauge and you can smell it) or the ignition is either breaking down or the timing or tune is off. When you let off a little and slowly mash on it it seems ok. Or when you are cruzin down the road in 5th and you downshift into 3rd or 4th and mash it it does the same thing. Any ideas? This just started about 3-4 weeks ago. Also the car always seems to take a while to start like 5-10 seconds and also when the A/c is on it really seems to want to kill. Do you think this is in the tune? Or where to start?
Thanks in advance.
09-12-2009, 12:54 AM
sounds like my car when i blew the ringlands...
09-12-2009, 01:17 AM
Your car is running super rich in boost. That is why it's bogging. Too much fuel will kill the spark. I know the lowest afr the AEM wideband read is 10. Get that thing retune before you wash your rings.
09-12-2009, 02:35 AM
new plugs? or gap
09-12-2009, 07:15 AM
10.0 is way rich.
09-12-2009, 07:16 AM
Check for a leaking charge pipe as well.
09-12-2009, 07:28 AM
I know it is not ringlands as compression is good, it runs and idles fine, and it doesn't smoke. The charge pipes all seem to be fine and tight, I don't see anywhere that looks like it would leak or have a bad connection. Why would it start now? It was tuned about a year and a half ago and I have not changed anything? Where would you go? I got it tuned at DB up in rogers the first time however it is so far away from where I live, I was thinking maybe MAP? Any suggestions?
09-12-2009, 09:19 AM
get it retuned.
09-12-2009, 09:22 AM
If the tune hasn't changed, and it's still that rich, you'll need to be looking for where it's losing air/boost.
09-12-2009, 09:57 AM
09-13-2009, 11:46 AM
If my boost gauge is reading 10 psi I don't think its leaking or am I missing something? I checked the plugs and they look ok, it would not hurt to replace them. What should my fuel pressure be at at idle? Should I put a stock FPR back on it?
09-13-2009, 03:08 PM
09-13-2009, 03:51 PM
spark issue. yes like hatchbone said. spark wires and plugs
09-13-2009, 04:58 PM
Plugs are bad. You should be replacing them regularly. IMO, every 5-10k miles.... And since the plugs you SHOULD be running, only cost like 1.80/plug, it is not that big of a deal...
09-13-2009, 09:11 PM
The plugs may be bad, but I agree with the above posts that if you're pegging the wideband at 10.0 on 10psi boost, you're running way to rich. The bog you describe may be the plugs, but that much fuel in the combustion chamber can be hard to light.
09-14-2009, 05:32 AM
What plugs should be in there? I forgot what the number is off the top of my head but I know its a NGK something but it is not the stock plug either. I will probably start there since it is the cheapest. Then look for a coupler loose or something.
09-14-2009, 07:46 AM
i think it's like 3330 the ngk v-power
09-14-2009, 07:44 PM
What would happen if I put the stock plugs in?
09-14-2009, 07:46 PM
It has NGK BCPR7ES in it right now, they are kind of worn, kind of a powdery grayish white on them which I would say may be detonation? Lean? MAybe?
09-28-2009, 03:45 AM
i know its been a few weeks since the last post but... do you have an aftermarket map sensor??? how long ago did you change your o2 sensor(s)??? the stock map sensor in a honda can only handle up to around 10 psi. if your still havin the same problem and if you put new plugs and wires in i would deffinately check the o2 sensor.. 10 a/f ratio is waaaay rich like someone else said the aem wideband only goes down to 10. so you may even be richer then that! you should be around 11.5 - 11.7 while in boost IMO and 14.7 when idle a bad o2 can cause you 2 run REALLY rich.. have you noticed any gas mileage change??
09-28-2009, 08:27 PM
when I am driving and I hit it WOT once it gets up to around 5000-5500RPM full boost, it seems to bog/pop
When you let off a little and slowly mash on it it seems ok. Or when you are cruzin down the road in 5th and you downshift into 3rd or 4th and mash it it does the same thing.
Exact same thing that happened to mine with a still connected, yet leaking coupler. Shocking it (WOT) leaves your boost threshold further back in the rpm, leaving your fuel to go rich at that point, and (I describe it as) stumbling.
Backing off and getting back into it will most often leave everything boosting fine. It stumped the hell out of me too, until the coupler completely took a dive and I was stumbling anytime I hit 5200rpm (my boost threshold). Then I punched myself in the face for fretting over it for days on end and having it be something so stupid.
09-28-2009, 08:29 PM
the punch to the face mustve hurt..
09-28-2009, 08:35 PM
Not as much as the sack-kick.
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