!
Bouncing boost
Bouncing boot
My car is untuned I have catless dp, oil cooler, bov, resonator delete, fmic. I just installed depracing charge pipes on my car to fix a previous boost leak and now when I’m full throttle the boost will bounce kinda, I’ve tried adjusting the BOV but that wasn’t it also getting turbo flutter and It wasn’t before anyone have any idea?
My car is untuned I have catless dp, oil cooler, bov, resonator delete, fmic. I just installed depracing charge pipes on my car to fix a previous boost leak and now when I’m full throttle the boost will bounce kinda, I’ve tried adjusting the BOV but that wasn’t it also getting turbo flutter and It wasn’t before anyone have any idea?
1 - 20 of 21 Posts
I can hear the blow off valve cycling, the ECM does this on the stock tune to vent excess boost, although it normally does it more rapidly. The BOV adjustment may be a determining factor there though.
When was the last time you removed, disassembled, cleaned, and reoiled your BOV? They're supposed to be done every 6 months
When was the last time you removed, disassembled, cleaned, and reoiled your BOV? They're supposed to be done every 6 months
This is not true, several of us have run downpipes for long periods of time before tuning. I put 10 to 15,000 on mine before putting the powermax on.Running with a catless without tune, it most trigger a couple of codes and create some issues.
I think he was referring to running a catless DP and having it set codes (P0420, for instance) unless he were to run a defouler or something similar.I can hear the blow off valve cycling, the ECM does this on the stock tune to vent excess boost, although it normally does it more rapidly. The BOV adjustment may be a determining factor there though.
When was the last time you removed, disassembled, cleaned, and reoiled your BOV? They're supposed to be done every 6 months
This is not true, several of us have run downpipes for long periods of time before tuning. I put 10 to 15,000 on mine before putting the powermax on.
But he says "and create some issues" which it doesn't. I think you had more miles than I did running downpipe with stock tune, right?I think he was referring to running a catless DP and having it set codes (P0420, for instance) unless he were to run a defouler or something similar.
Yeah, I had at least 25K or so on it before I started down the tuning road. I know the thing had an OEM-type catalyst on it, and it didn't flow as well as the CVF DP's cat, but it also didn't set a P0420 like the CVF did (until I got that resolved).But he says "and create some issues" which it doesn't. I think you had more miles than I did running downpipe with stock tune, right?
Just serviced the BOV reduced the flutter a little but still noticeable and the boost is still “bouncing”I can hear the blow off valve cycling, the ECM does this on the stock tune to vent excess boost, although it normally does it more rapidly. The BOV adjustment may be a determining factor there though.
When was the last time you removed, disassembled, cleaned, and reoiled your BOV? They're supposed to be done every 6 months
This is not true, several of us have run downpipes for long periods of time before tuning. I put 10 to 15,000 on mine before putting the powermax on.
Wonder if the wastegate preload was tightened and then this car was returned to stock tune?
Really we need a proper datalog to see what the PCM is commanding versus what the engine is actually doing.
Really we need a proper datalog to see what the PCM is commanding versus what the engine is actually doing.
I’ve owned it for a year never has done this until I replaced ChargepipesWonder if the wastegate preload was tightened and then this car was returned to stock tune?
Really we need a proper datalog to see what the PCM is commanding versus what the engine is actually doing.
Ah Okay. You weren't very clear. I was under the assumption you'd been chasing issues for a while.I’ve owned it for a year never has done this until I replaced Chargepipes
The flutter is likely due to the BOV adjustment.
The BOV is hooked to the solenoid control still correct? It sounds like in the video the BOV is opening which would only be done intentionally by the PCM (which again, is normal for it to do). Normally it cycles more rapidly though.
If I have it tighter than it’s supposed to be stock is it possible that it’s trying to bring the boost down but since the BOV isn’t adjusted it’s doing this?Ah Okay. You weren't very clear. I was under the assumption you'd been chasing issues for a while.
The flutter is likely due to the BOV adjustment.
The BOV is hooked to the solenoid control still correct? It sounds like in the video the BOV is opening which would only be done intentionally by the PCM (which again, is normal for it to do). Normally it cycles more rapidly though.
That might explain why it isn't doing it as rapidly as I'd expect. Do you remember how many turns you adjusted it? Set it back to where it was and see.If I have it tighter than it’s supposed to be stock is it possible that it’s trying to bring the boost down but since the BOV isn’t adjusted it’s doing this?
my car is also throwing an underboost code even though open throttle it reads 20 I think
This is pertinent.my car is also throwing an underboost code even though open throttle it reads 20 I think
You never answered my question if the BOV was hooked to solenoid control or manifold vacuum. I've been on the assumption that it has been on the solenoid this whole time
I think it’s connected to the solenoidThis is pertinent.
You never answered my question if the BOV was hooked to solenoid control or manifold vacuum. I've been on the assumption that it has been on the solenoid this whole time
Okay.
Did the p0299 set before you put the charge pipes on? I'm just making sure it wasn't previously there and never cleared once you corrected that leak
Did the p0299 set before you put the charge pipes on? I'm just making sure it wasn't previously there and never cleared once you corrected that leak
I cleared the code then it came back after chargepipesOkay.
Did the p0299 set before you put the charge pipes on? I'm just making sure it wasn't previously there and never cleared once you corrected that leak
Okay. Your best course of action at this point will be a boost leak test. Metered to 26psi. You can build your own or buy one. There are a few threads on here about it, you'll have to do some digging. I don't have any immediately handy
I am now looking for a boost leak due to my car limiting it at about a quarter boost I’m using depo racing Chargepipes and the fitment is a little iffy but I’ll update when I fix it.
Yes It was there because of a tear in the cold side Chargepipes was then replaced and worked fine for about a week but then the boost was “bouncing” after install i then tried to fix it by making sure all the fittings were not leaking leading to it going to about a quarter boostOkay.
Did the p0299 set before you put the charge pipes on? I'm just making sure it wasn't previously there and never cleared once you corrected that leak
1 - 20 of 21 Posts
Ford Focus ST Forum
We’re the premiere Ford Focus ST forum with discussions on the 2013+ Focus ST. Join the community and see the latest news, photos, videos, classifieds, reviews, events and more!
Full Forum Listing
Explore Our Forums
Recommended Communities
