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Strange Issues with my EVO 8 MR

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Old Oct 18, 2006, 11:12 PM
  #16  
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Originally Posted by WickedWhtMR
i took the car to work today and 1st thru 3rd gear are fine. The car hits 19 to 20 lbs. i shift into 4th and the car hits 25lbs.... shift into 5th and the car hits 33lbs of boost. Any ideas... Ive adjusted the boost controller.... ive replaced the boost controller.... any ideas?
Sorry man I'm better at electronics than mbc's.

I'd check for simple things like the pill still being in the hose, or even test it without the mbc just to make sure it doesn't spike period
Old Oct 18, 2006, 11:15 PM
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what pill?
Old Oct 18, 2006, 11:19 PM
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Originally Posted by WickedWhtMR
what pill?
Its a resitrictor inside the vacume line..

looks like this

http://www.vishnutuning.com/images/i.../evo_pill4.jpg


its located here
http://www.vishnutuning.com/images/i.../evo_pill3.jpg
Old Oct 18, 2006, 11:26 PM
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BTW i found a nice thread to make sure your MBC is hooked up correctly

check out this image
Old Oct 19, 2006, 09:04 AM
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i have the MBC hooked up a little different... i have a hose to the wastegate..and hose to the underside of my HKS intake....itss always been this way....also i used new vacume line for my boost controller...
Old Oct 19, 2006, 12:58 PM
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bump for more info on this....
Old Oct 19, 2006, 01:02 PM
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Can you further explain how the hose connects to your wastegate and intake?
Old Oct 19, 2006, 01:53 PM
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my mistake... i just took the intake and uicp out of the car. the shop left one of the vac line from the stock actuator hooked up into the hks intake. the vacume lines are set up as follows:
waste gate to side port of the mbc.
pressure nipple on turbo to bottom of mbc.

is the pill on the top hose or the bottom hose comming of the stock actuator?

i have replaced the rear bulbs and my voltage is back to normal.
13.5v at idle
13.8v to 14.1v under load
Old Oct 19, 2006, 02:03 PM
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My walbro fuel pump also makes a whining

It sounds like some sort of boost leak to me.
Old Oct 19, 2006, 02:04 PM
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I could be wrong but isn't that backwards? If it is I'm not sure how the spring is going to react with pressure on the other side maybe it would just not let any pressure through *shrugs*

Far as the pill i believe its on the bottom hose of that picture with the red arrow showing the front of the car.
Old Oct 19, 2006, 02:12 PM
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Originally Posted by gaulrich2003
It sounds like some sort of boost leak to me.
Good point he has there
Old Oct 19, 2006, 02:17 PM
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the shop is telling me i have a bad wastegate
Old Oct 19, 2006, 02:26 PM
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Originally Posted by WickedWhtMR
the shop is telling me i have a bad wastegate
At least you found the culprit

Sorry i couldn't be more helpful
Old Oct 19, 2006, 02:29 PM
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they made that asumption over the phone.... im not sure replacing it will fix my problem....
Old Oct 19, 2006, 02:44 PM
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Id like to know the results if the mbc was hooked in backwards personally going to search it later


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