Help, Cobb Stage 2 breaking up at high RPM
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Help, Cobb Stage 2 breaking up at high RPM
I'm running Cobb HKS 93 oct stage 2 map. My mods are just a panel filter, UICP, pulled the pill (I tried putting it back in because I was slightly overboosting, but I had the same results.) and AP.
I'm getting a lot of breakup that starts at about 5500rpm at WOT. I'm thinking plugs are possibly getting weak, but I just don't know. I'm also getting tons of black smoke during the breakup, so I don't know if it is from overfueling or misfire.
Any help would be great. Thanks.
I'm getting a lot of breakup that starts at about 5500rpm at WOT. I'm thinking plugs are possibly getting weak, but I just don't know. I'm also getting tons of black smoke during the breakup, so I don't know if it is from overfueling or misfire.
Any help would be great. Thanks.
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For all that don't know, Stage 2 does not require the exhaust system(per Hollywood).
I have read the instructions and am fully aware of what cobb states is required.
It has been verified by several other people and tuners that the stage 2 is safer without the exhaust and not absolutly needed.
I have read the instructions and am fully aware of what cobb states is required.
It has been verified by several other people and tuners that the stage 2 is safer without the exhaust and not absolutly needed.
#11
Why don't you call Cobb directly? There has to be a reason they have a stage 1 versus stage 2 map right? It "might" be ok for "some" cars to run stage 2 without an exhaust, but I would guess that in general, it's safer and better to run the stage 1 map. Try stage 1 and see how it runs.
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Why don't you call Cobb directly? There has to be a reason they have a stage 1 versus stage 2 map right? It "might" be ok for "some" cars to run stage 2 without an exhaust, but I would guess that in general, it's safer and better to run the stage 1 map. Try stage 1 and see how it runs.
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Stage 1 - Intended for an otherwise stock 2008 Mitsubishi EVO X GSR vehicle with a stock or cat-back exhaust
Stage 2 - Intended for an otherwise stock 2008 Mitsubishi EVO GSR vehicle with full turbo back exhaust system
Which part of “full turbo back” don’t you understand?
Stage 2 - Intended for an otherwise stock 2008 Mitsubishi EVO GSR vehicle with full turbo back exhaust system
Which part of “full turbo back” don’t you understand?
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Stage 1 - Intended for an otherwise stock 2008 Mitsubishi EVO X GSR vehicle with a stock or cat-back exhaust
Stage 2 - Intended for an otherwise stock 2008 Mitsubishi EVO GSR vehicle with full turbo back exhaust system
Which part of “full turbo back” don’t you understand?
Stage 2 - Intended for an otherwise stock 2008 Mitsubishi EVO GSR vehicle with full turbo back exhaust system
Which part of “full turbo back” don’t you understand?
I am very aware of what cobb claims that you need to run stage 2.
This is the type of response i was looking for.
Originally Posted by hollywood_X
Also when running stage 2 without the "Requested" modifications that Cobb lists you wont get the full benefits from the tune.
You gave a lot of down low grunt but in the upper rpm's at higher gears the exhaust backpressure will start effecting you.
Getting a good cat back will solve the power loss and studder that you are experiencing.
Last edited by Ruff Ryda; Nov 7, 2009 at 11:36 AM.