so i am stationed in germany and need some advice. i bought an evo 8 right before being shipped over seas, ran great until about 2 wks ago, but now, over 10 psi, under 1/2 throttle or more, the car stutters and the motor jumps and backs in and out. It kinda feels like a mis-fire? Maybe a fuel or spark issue, or maybe a wastegate problem. There is no one to diagnose the problem where i am, so i thought i would just put it out there. Any advice would be grately appreciated. thanx.

 

Check your intercooler pipes bro

 

yyyeah. it's definately not that. i went through all the piping, vacume lines, and fittings. It just jolts really bad a couple times then comes back in. but it stops boosting at 10-12 psi. thanks tho. idk. is it true that if the wastegate is failing, it opens at 10 psi?

 

wtf is up with your title? makes no sense

 

assuming it means its unmolested. not modded but completely stock evo. now it has those problems.

 

or the fact that he may be new to the evo scene and knows nothing about it?

 

double check all vacuum lines. perform a boost leak test whether you think the couplers and ic pipes are good or not. check you spark plugs and the gap.

 

very good. thank you. first evo AND it's stock. (wtf is up with your titile... lol thanks "casper"). way to think outside the box. i will check the gaps, thanks. im home for the hollidays and the evo's still in germany, but thanks for all the imput.

 

Plugs for sure. I've had the same issue. Stay out of boost until you check your plugs and gap them properly!!!