Hi all in the last couple of days me series 2 escort rs turbo has started to over boost intermitantly. Doesnt do it very often but is annoying when it does because i dont want anything to go pop . I have the actuator set to hold boost at half a bar but ever now and then it will boost like crazy up to a bar then tail off to half a bar again if i keep my foot down. Im thinking its the amal valve? but didnt know if you guy's had experienced this problem and know what it could be? ive found a new amal valve on ebay but just wanna make sure before i buy one!
Cheers in advance!!

 

anyone??

 

if I understand you, you have too much boost? If yes, check hose which goes from turbo to actuator, maybe is cracked. Or maybe you have wrong set actuator arm, try to turn few turns to make it longer, then boost must go down.

If amal valve is faulty, you will have some sort of "safe mode" , and you will have only 4 psi of boost , or 0.3 bar.

 

never had an rs turbo, if they run an amal valve then it could well be that

i had a similar thing on my cossie where the pipe which goes to the actuator came off and kept mking boost - lucky i have a boost gauge!

 

if you have one of those actuators that have allen key bolts all the way round, check they aren't coming loose.

 

Thanks for the replys guys! will check the hose going to the actuator today and check the actuator itself.
Ill let you know when i find out what it is for futre refrence for other people incase they get this problem!
cheers

 

I would reccomend checking both wastegate (actuator) and compressor (turbo) hoses to the amal valve, also check for corrosion in the plug at the amal valve of a broken wire. Also, as mentioned, check the actuator for leakage ie the capscrews if they exist. Also, the diaphram inside the actuator might be on its way out.

The worst case scenario is that the penny inside the wastegate might be broken.