i have a mk2 fiesta XR2 with an escort RS Turbo engine in.

recently had it rolling roaded at 190bhp but the clutch was slipping like mad due to all the power, so fitted a paddle clutch, so hopefully should see more than that when i go back.

it was setup on 15psi and has a big front mount intercooler and is chipped running a stage 1 turbo.

now last nite i was driving and when it hit boost it would cut out for a asecond then id have control back. spoke to some ppl and they said its "overboosting"

what i want to know is what EXACTLY is this, and what are the causes...and how can i stop it?

i have a bleed vave to control boost.

thanks for any help

Ry xxl

 

i take it u have boost gauge did u see what it boost it hit

 

i had a friend in the car and he did say it went to 18psi at one point. why would it do this if it was set at 15psi?

Ry

 

last night was a touch chilli...that could be the reason!......get it sorted tho cus thats how i killed my first engine!

 

nooo! doesnt sound good!

why does it happen tho?!

is there anyway i can stop it? how exactly do i sort it!

Ry

 

yeah dont plant ya foot to the floor!...go see a garage! and by an unlimited boost chip! lol.....put it on the genral board thats where all the engine tuners hang about!

 

whats the point in having an RS then :'(

hehe cheers ill post it there too.

 

Take it back where you got it tuned from and explain to them what the problem is. When you say recently, how recently did you get it tuned?

 

2weeks?

proly drove about 100miles since, that includes the 60miles to get home from the tuners :'(

but ive had a clutch fitted since. dunno if that would effect it.

ry

 

Have you got a bleed valve because i had my gearbox fitted once on my ERST once and the cowboy mechanic also managed to mess around with my bleed valve. Why dont you just turn the boost down

 

Get rid of your bleed valve and go for a new -31 actuator this could be the cause. Like James birch said take it back to where you had it tuned and tell them and dont mess with that bleed valve they can do more harm than good