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Old 11-20-2003, 12:43 AM   #1
roffle
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Default MY97 EJ22 + CAI = Death?

I slapped a CAI on MY97 Impreza L and about 2 months after experienced lurching problems and twice it has stalled if I didn't warm it up properly.
I've been told by many sources that the 97 EJ22 isn't CAI friendly, but also that there are other options than removing it?

Help?
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Old 11-20-2003, 02:07 AM   #2
Kostamojen
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What kind of CAI?
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Old 11-20-2003, 11:27 AM   #3
StewedSquirrel
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Did you rig up the MAF to the system? I've heard closed-system CAI setups that "ram" air into them can fool the MAF into thinking it's running lean and they tend to lean toward running very rich.

If you removed the MAF entirely, the ECU goes into a sort of "limp home" mode, just guessing at the A/F mix and usually guessing very poorly, running rich and killing power and fuel economy.

I've been thinking of trying to design a CAI for my MY98 EJ22, but I'm wary of all of the issues with the MAF. You have to be careful to give it a very smooth airflow and that you don't "ram" too much air into it or it will choke the engine.

Eric
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Old 11-20-2003, 12:18 PM   #4
mattjb
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Quote:
Originally posted by StewedSquirrel
You have to be careful to give it a very smooth airflow and that you don't "ram" too much air into it or it will choke the engine.

Eric

Very true. If you try to stomp it from a dead stop it'll choke every time.
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Old 11-20-2003, 12:39 PM   #5
m750
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Quote:
Originally posted by mattjb
Very true. If you try to stomp it from a dead stop it'll choke every time.
malarky... This happens becaust the air box is removed, and there isn't enough air in the tube to provide it. Hence why people say there is a loss of low end torque.
My theory on your problem, is most likely your maf, you prolly over oiled your cone filter, and are expierencing a flaky maf. Go to www.scoobymods.com and check out the maf cleaning / replacement procedure and see if it helps.
AO
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Old 11-20-2003, 04:20 PM   #6
marcus12
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Yeah...I have the same exact problem with my EJ22 and my K&N CAI...MAF blew out...I'm gonna try replacing the MAF sensor, and if that doesn't work, I'm gonna bite the bullet and put my stock airbox back on...
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Old 11-20-2003, 06:02 PM   #7
StewedSquirrel
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Quote:
his happens becaust the air box is removed, and there isn't enough air in the tube to provide it
The CAI I had dreamt up for my EJ22 kept the airbox, branched off the airbox into a small pipe running upward, and angled toward the hood scoop. The MAF would be dropped in somewhere on this tube, then up to a high-flow filter, which is immediately underneath (slightly in front of) hood scoop. It would have an "airguide" to scoop cold air foward under the hood to the filter, which would have a few drains tubes in the bottom so that any water that needed to drain woudln't drip directly on the hot block.

I haven't measured it and I'm just running on memory of having about 6 inches of clearance between the top of the block and the underside of the scoop. I have a feeling the airbox or throttle body may get in the way of this installation... I'll measure it tonight.

:-)

Eric
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Old 11-20-2003, 06:36 PM   #8
roffle
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well I've never oiled my cone filter, Its only been on for 3-4mos, so.. I'll just put the airbox back on with the CAI I guess

I lose some grumble, but if it un-breaks my car then hooray
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Old 11-20-2003, 07:03 PM   #9
1 Lucky Texan
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In addition to being a new soob owner, I also am fairly ignorant of many of the nuances surrounding all the sensors on newer cars. In general, if the intake is going to be modded, is a MAP or a MAF more forgiving of the alterations? If one is better to have for modding, can that type be upgraded instaed of the 'bad' type?

just wondering

Carl
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