Except for it running pig rich when you shift and your bov vents

How did you confirm that your car is running -11.8psi at idle? That's pulling more vacuum than stock. Stock is around -8 to -9psi (roughly 16-18in/HG of vacuum).

 

I thought evos idled at ~18psi of vacuum with stock cams and stock idle settings. At least thats what my boost gauge showed until cams were added. I see roughly -12psi with cams and 1,000rpm idle.

 

See my sig, engine was rebuilt with lots of goodies. Using evoscan with JDM map to read vacuum.

 

Don't trust your boost gauge, mine showed the same thing.

 

You are confusing in/HG of vacuum with psi. Boost gauges that show vacuum are almost always showing it in in/HG, not PSI. as a rough estimate, in/HG is double the PSI rating. So if your gauge shows -18in/HG, that would roughly be -9PSI.


@mithranir


Assuming that your JDM MAP PSI formula in evoscan is correct, I would still be surprised you are pulling that much vacuum unless your idle is very high. What is your elevation? I'm pretty sure Houston is close to sea level right? Your sig didn't say your engine was rebuilt with lots of goodies, it could have been rebuilt with stock components for all I knew lol. Plus, your sig basically shows that you blast through parts really fast

 

Basically, I rebuilt it with the AMS 2.0L rebuild kit, AMS oil pan, AMS balance shaft delete kit, ARP main studs and K1 billet crank.

 

i have the same issue after installing megan o2 housing but car drives good my innovate showing 12.2/11 at idle. i am facing another problem when the clutch is engaged my rpm drop to 100..what to do????

 

Is this the o2 sensor that goes in the o2 housing? I need a new one and I'm quoted $365.00!!!!

These guys want $100.00 for the same thing:
http://shop.edoperformance.com/mitsu...ource=googleps

but $65 + $10.71 S&H is the goods!!


Please advise, ASAP. I'm stalled once again.

 

call around your local parts stores. Im sure youll get one for under 100.

I got one over this passed weekend for 75. I had same symptoms. I replaced it and now car drives well

 

I got this overnighted for $70

Denso 234-4741 Oxygen Sensor (Air and Fuel Ratio Sensor)
http://www.amazon.com/dp/B000C5SGEU/..._cs_sce_dp_1_B

it's out for delivery since 7:18 this morning.

 

Hey guys! I have an EVO X full bolt ons! Currently running a Cobb stage 3 map. My AFR cruising is around 11. I don’t know if it’s the tune or if a have a bad part (bov, O2, MAF, a leak). I bought the car a month ago and didn’t realize it was running so rich.
what do you guys think I should do ?