Idle issues after Walbro install / airbox mod
Mar 25, 2007, 04:41 AM
#1
Idle issues after Walbro install / airbox mod
Mods are in my sig... the last thing I did was Walbro 255lph fuel pump.... as soon as I did this, I noticed that when I idle, every ~20 seconds or so, RPMs will drop from ~900 to ~700 (as if the car is about to stall) and then it will catch itself and bring it back up.
I have been tuned since then (Jestr M1), but the problem still exists.
It hasn't caused the car to stall yet, it just feels as if it's going to and then catches itself.
I don't know if this is a common problem. Now that I think of it, I did make one other change when I installed the Walbro... I cut out the side of my airbox cover like this:
Do you think the airbox cover is the problem or the fuel pump?
I have been tuned since then (Jestr M1), but the problem still exists.
It hasn't caused the car to stall yet, it just feels as if it's going to and then catches itself.
I don't know if this is a common problem. Now that I think of it, I did make one other change when I installed the Walbro... I cut out the side of my airbox cover like this:
Do you think the airbox cover is the problem or the fuel pump?
Last edited by recompile; Mar 25, 2007 at 06:19 AM.
Mar 25, 2007, 05:18 AM
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hahaha that is ghetto.. your not getting more air..
if anything your filter's capability is decreasing by the minute.. as is prone to get dirtier faster..
We all know what a dirty filter means.. less performance.. and indeed that may be your issue..
if anything your filter's capability is decreasing by the minute.. as is prone to get dirtier faster..We all know what a dirty filter means.. less performance.. and indeed that may be your issue..
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Mar 25, 2007, 05:25 AM
#9
My friend's HKS Racing Suction takes in air 15 degrees hotter than mine
Last edited by recompile; Mar 25, 2007 at 05:29 AM.
Mar 25, 2007, 05:41 AM
#10
Follow the path of the air getting sucked in............it won't hit the side of the intakebox, then down thru the filter, because the incoming air is blowing right back out of the"modified hole! Only SOME, not ALL, of the injested air is getting in the motor this way.
Last edited by smokedmustang; Mar 25, 2007 at 05:47 AM.
Mar 25, 2007, 05:45 AM
#11
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could be the hot air from engine bay.....
i know cams make the rumble like thier about to die
"DUDE YOUR CAR IS ABOUT TO DIE!"
-guy with cams-
"no, no my friend, its more alive then youll ever know...."
i know cams make the rumble like thier about to die
"DUDE YOUR CAR IS ABOUT TO DIE!"
-guy with cams-
"no, no my friend, its more alive then youll ever know...."
Mar 25, 2007, 05:58 AM
#12
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Wow you datalogged it..
so you pretty much got it down packed where is how much of the box was suppose to be cut.. Why not cut a inch more.. datalogg it maybe you'll see even more performance..
This is by far not the smartest idea in terms of performance enhancement.
If you are looking into keeping the stock air box for a bit, I suggest a drop in filter.
A drop in filter outperforms this silly idea and will actually give the performance you seek..
so you pretty much got it down packed where is how much of the box was suppose to be cut.. Why not cut a inch more.. datalogg it maybe you'll see even more performance.. This is by far not the smartest idea in terms of performance enhancement.
If you are looking into keeping the stock air box for a bit, I suggest a drop in filter.
A drop in filter outperforms this silly idea and will actually give the performance you seek..
Mar 25, 2007, 06:01 AM
#13
Wow you datalogged it.. so you pretty much got it down packed where is how much of the box was suppose to be cut.. Why not cut a inch more.. datalogg it maybe you'll see even more performance..
This is by far not the smartest idea in terms of performance enhancement.
If you are looking into keeping the stock air box for a bit, I suggest a drop in filter.
A drop in filter outperforms this silly idea and will actually give the performance you seek..
so you pretty much got it down packed where is how much of the box was suppose to be cut.. Why not cut a inch more.. datalogg it maybe you'll see even more performance.. This is by far not the smartest idea in terms of performance enhancement.
If you are looking into keeping the stock air box for a bit, I suggest a drop in filter.
A drop in filter outperforms this silly idea and will actually give the performance you seek..
Why don't you take a look a long hard look at this thread where you can read what multiple people have tried, logged, and tested... instead of saying "WHOA WHOA ALL AIRBOX MODS ARE BAD, WTF ARE YOU DOING MORON?!!??!"
https://www.evolutionm.net/forums/sh...ghlight=airbox
Last edited by recompile; Mar 26, 2007 at 05:12 AM.
Mar 25, 2007, 06:03 AM
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An aftermarket intake has a known intake path. this one looks like you can suck air in the snorkel, and have the air blow BACK OUT the newly fabricated "side hole". I say you put the normal airbox cover on, or just go cone intake. Don't fab the boxtop. That is the problem here, I am pretty confident. surely would have different characteristics at idle, and WOT on the road. Follow the path of the air getting sucked in............it won't hit the side of the intakebox, then down thru the filter, because the incoming air is blowing right back out of the"modified hole! Only SOME, not ALL, of the injested air is getting in the motor this way.
Follow the path of the air getting sucked in............it won't hit the side of the intakebox, then down thru the filter, because the incoming air is blowing right back out of the"modified hole! Only SOME, not ALL, of the injested air is getting in the motor this way.
Mar 25, 2007, 06:05 AM
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Wow you datalogged it.. so you pretty much got it down packed where is how much of the box was suppose to be cut.. Why not cut a inch more.. datalogg it maybe you'll see even more performance..
This is by far not the smartest idea in terms of performance enhancement.
If you are looking into keeping the stock air box for a bit, I suggest a drop in filter.
A drop in filter outperforms this silly idea and will actually give the performance you seek..
so you pretty much got it down packed where is how much of the box was suppose to be cut.. Why not cut a inch more.. datalogg it maybe you'll see even more performance.. This is by far not the smartest idea in terms of performance enhancement.
If you are looking into keeping the stock air box for a bit, I suggest a drop in filter.
A drop in filter outperforms this silly idea and will actually give the performance you seek..