right got an rs from a mate because he is fed up with it so thought i would add it too my collection , it has a big boost problem engine is 100% no rattles smoke anything as is fresh . now guy was under the impression that his turbo had let go and thats why he wasnt boosting well i got my hands on it swapped the turbo off of another of my cars togethor with all samcos and vacume pipes as well as a bleed valve all of which worked 100% on my other car now after replacing everything still no boost if i nail it on load in 3rd and 4th will boost to 2 psi but no more 1st gear and 2nd boost gauge just reads 0 any ideas people as it has stumped me ??? wonder ed about inlet manifold or metering head as that is all that is left on the car ? lol

any opinions please ???????

many thanks in advance

 

Have you tried changing the actuator?

 

knackered boost guage maybe?

 

it wont boost ther is no boost if you give it a hiding then you get the smallist noise so somewhere there is a boost leak actator is new and set up all came from my other car which boosts up fine now could this be from the metering head or inlet manifold anyone else had this happen as ive owned a fair few and never come across it .

 

as well ive pulled the pipe off to run unlimited boost still doesnt boost any different ??? boost gauge is a ford racing one again off of another car where it works fine so trust that too

 

ive had boost guages leak before, never enough to completly lose all boost tho

 

use 2 differnet boost gauges tried unplumping everything so vacume is just to the ecu alone still nothing

 

i wondered if an inlet manifold gasket could be leaking and causing it ?

 

that would cause a high idle speed also, its worth checking tho get some wd40, easystart or brake cleaner and spray around the inlet while running, if the revs alter then you have an air leak

 

tried that nothing :O( spoke to simon from at a1 rally sport he was stumped to its an odd one need to get the system pressure tested , but im sure i can find out what it is as the mfi system is so easy

 

post what you find would be interesting to see the outcome of this one

 

bump ???

 

duno if this is corect just what i have heard or miss heard. maybe the knock sensor is faulty?

joe

 

have you tried disconnecting the amal valve, and running the pressure feed from the turbo inlet direct to the actuator?

 

which pipe did u pull off!?

 

pulled off the bleed valve which bypasses the amal valve so that cannot be at fault :O/

how can i test the knock sensor ???

 

unscrew it and cable tie it to a hose or something that wont vibrate.

 

i had the exact problem a few years ago. it was the wastegate "penny" in the elbow had fallen off

 

ive change the complete turbo overfrommy other car which is a perfect runner and runs 14psi :O(

 

I had the same sort of problem only weeks ago... found out to the the actuator was holding the wastegate open. When its off boost the actuator should be holding the wastegate (penny) shut, if it not its letting the boost out, thus no boost

Try it mate, i had this problem for ages and was a simple fix.

 

mmmmmmmm il have a look tomorrow just my actuator was on the other car and was fine swapped it over as a whole unit why would it be different from just swapping cars mmmmmmmmmm something to look at though ,

as for the knock sensor what does it do ?

 

senses knocking lol If you get detonation in the chambers its does something to rectify. I dont know what it does though lol you'll have to ask someone else.
Basically a safety meassure. I had a faulty one so when my car was on the dyno I got a very squiggly line where the knock sensor couldn't make its mind up.

 

ah cool would it stop it boosting altogether though ?

 

right took another knock sensor of my other engine still no diffrent whats next any ideas ? is to much to ask that i want boost lol

 

Whats the intercooler like any holes in it? Is there any pipes missing from inlet? How does the car run?

Joe

 

I would check the intercooler as it seems you have checked everything else might have a hole in!!!!!!!


Good luck

 

id do a compression test

 

That included the elbow with the wastegate arm and penny?

Has it got a dump valve on it? If so, remove it and block the hole up.

 

if it had that big a boost leak youd hear it id of thought. ive got a fitting to pressurise the system at the yard mate

does it run ok aside from no boost ?

 

car runs sweet as just no boost lol il have to pop up dude !!

 

Are you sure its not really an XR3i?

 

Lmao!

 

yes mate ring me and we sort it out, bring it over itl only take a few mins to do. ive got a plug with a gauge in just gotta find it.

 

did you find out problem m8, got the same problem but just thought my turbo gave up on me, dont want to buy turbo if it aint that lol.

 

na still in the workshop have had my white turbo out to the shows so have just left it sitting there this week il get on the case and have another play