Hey guys, I can only resort to you guys helping us, since mitsubishi dont know anything.

My friends evo 8, lightly modded was working fine. Its done 35 000km now.
From 1000 - 3000 RPM car seems normal and turbo starts to kick in, straight after 3000 through to 6000 RPM or so, the car shakes violently and turbo makes a fluttering sound.

Its as though the turbo is turning on and off like crazy. It's un drivable.

Will it be ok to see the guys at Ralliart?
What do you think the problem is?

 

Maybe it's time for new spark plugs. My was doing the same thing, after I pass 3500 rpm it would flutter. Try that

 

shiiite~ thanks dude,

whats the best spark plug I could go for? or do I just go for the factory ones?

and why would the spark plug cause this retarded problem?

 

Not enough spark, I use ngk idrium 12-16 dollars per plug I change mine out ever 20k miles

 

thanks heaps.
I'll change it now.

 

The same thing happened to me when the Advance auto store sold me the wrong plugs.

 

The owners telling me, he thinks its a waste gate problem.
does that sound right?

 

Is your mate running the stock recirculating diverter valve, or an aftermarket blow-off-valve?

 

i would say plugs, then fuel system (pump gone bad time for a Walbro!)

or a boost leak as sparky said.

 

Don't spend all that money on fancy Iridium plugs for a lightly modded street Evo 8. An NGK copper core plug such as the BPR7ES, BR7ES, or the BPR8ES would be serviceable. Gap should be adjusted to 0.024-0.026".

 

The WG is easy enough to check. There have been some isolated cases where the WG flapper valve(wastegate puck) has become unattached from the pivot arm. But, this is indeed a rare occurence.

Otherwise, on the stock WGA, the diaphragm could be torn. This is even a rarer happening. To me it doesn't sound like the usual WG degradation, but I could be wrong. At least the way you describe it, it doesn't sound to me like a wastegate issue.

 

Then, I'll replace the spark plugs for now. See what dfference it makes.
Hope it's not the WGA.
Thanks guys. I'll be replacing it on Monday.

 

Just save me some Brown Ale!

 

My evo 8 turbo and HKS blow off valve are not functioning and i cant seem to find the problem checked all pipes and spark plugs and nothing