Idle lean after catback
#1
Idle lean after catback
Forum,
Just got a 3'' catback installed but the AFRs are idling at 15.2 (avg) and not 14.7 (avg). This is not a reading from evoscan, this is a reading from off of my UEGO. Is this normal? I don't think so because I just finished doing a bunch of searching. I drove the car from the shop to the house (approximately 3 miles). I noted the AFRs at idle while at lights and such.
Anyways, is this normal to have leaner AFR after catback install? Going to log WOT and Idle with evoscan tomorrow.
Just got a 3'' catback installed but the AFRs are idling at 15.2 (avg) and not 14.7 (avg). This is not a reading from evoscan, this is a reading from off of my UEGO. Is this normal? I don't think so because I just finished doing a bunch of searching. I drove the car from the shop to the house (approximately 3 miles). I noted the AFRs at idle while at lights and such.
Anyways, is this normal to have leaner AFR after catback install? Going to log WOT and Idle with evoscan tomorrow.
#5
There are no leaks up top. I know what you are talking about I had a blown gasket on the O2 Housing before that made it go full lean at idle (the readout). I am more than familiar with the bouncing you are mentioning. I remember 2 years ago when the UEGO went on and I started tuning AFRs. I was like I thought it was supposed to be 14.7 lol.
How's that Kinugawa treating you bro? I was going to get one but decided I didn't need that much power. Went with the 20g Tomei solution.
#6
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that afr is fine at idle. My idle is closer to 16 than 14.7. Idles great. I have had 2 evos for a total of 6 years and this is how they both always have been. With ambient temperature change i see 17s and it still idles fine until i get a chance to tweak it back to the 16s
#7
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There are no leaks up top. I know what you are talking about I had a blown gasket on the O2 Housing before that made it go full lean at idle (the readout). I am more than familiar with the bouncing you are mentioning. I remember 2 years ago when the UEGO went on and I started tuning AFRs. I was like I thought it was supposed to be 14.7 lol.
How's that Kinugawa treating you bro? I was going to get one but decided I didn't need that much power. Went with the 20g Tomei solution.
How's that Kinugawa treating you bro? I was going to get one but decided I didn't need that much power. Went with the 20g Tomei solution.
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#9
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just a question on your set-up (looking at your list of mods)
you are running a larger turbo and 25psi boost…
all that power on the stock intercooler?
#14
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well thats great work champ
aside from the head bolts, cams and lifters… your running stock pistons and crank.
apparently a tuner where i am, claims that 250kw @ the wheels (335whp) is the "Safe" power with a stock motor.