G
Guest
·Three times now (in 3 months) my Evo V has pulled up like a horse refusing to jump a fence! It scares the crap out of me, because it has to be bad for the engine.
Each time the situation has been identical - close to 7000rpm in 2nd gear. There's a kind of 'pop' similar to a backfire and a massive loss of power. I ease off the gas immediately and it all goes away. At first I thought it might be something to do with a speed restricting device, but it wouldn't make sense for that to be based on rpm (?). Then I thought maybe there's some kind of rpm restrictor - but why would this kick in just below the red line?
I've done a lot of searching of old threads, and it sounds to me like it must be a fuel cut. But this seems to happen when people have made modifications to air intakes/exhausts/etc. My V is completely standard, so it can't be caused by this. I've seen some posts that suggest it could be caused by a faulty/rusty wastegate actuator, so I'm guessing this is the first place for me to look.
Does anyone know if I should expect this problem in a standard Evo? Is it common?
I need some help here. Although I used to always do the work on my own cars, 17 years of company car ownership have put me back to the 'retard' class for motor mechanics. The last time I did any work myself, cars had carburettors and manual windows!

Each time the situation has been identical - close to 7000rpm in 2nd gear. There's a kind of 'pop' similar to a backfire and a massive loss of power. I ease off the gas immediately and it all goes away. At first I thought it might be something to do with a speed restricting device, but it wouldn't make sense for that to be based on rpm (?). Then I thought maybe there's some kind of rpm restrictor - but why would this kick in just below the red line?
I've done a lot of searching of old threads, and it sounds to me like it must be a fuel cut. But this seems to happen when people have made modifications to air intakes/exhausts/etc. My V is completely standard, so it can't be caused by this. I've seen some posts that suggest it could be caused by a faulty/rusty wastegate actuator, so I'm guessing this is the first place for me to look.
Does anyone know if I should expect this problem in a standard Evo? Is it common?
I need some help here. Although I used to always do the work on my own cars, 17 years of company car ownership have put me back to the 'retard' class for motor mechanics. The last time I did any work myself, cars had carburettors and manual windows!