problem please help !

1.1c ……. got an ashley 4-2-1 manifold for it … whilst taking the old standard one off i discovered a pipe about an inch diameter that goes from the inlet manifold to the exhaust and have no idea what its for (dont yet have a haynes) and the new 4-2-1 manifold doesnt have anywhere to attach this pipe to    can anyone tell me what its called and its purpose ???? is it needed ?? wanted to get the manifold on tonight but its not looking good at the min ! :dontknow:  :dontknow:  :dontknow:

couldnt get a picture as my photobucket is being a bellend

I don't know but guess is it anything to do with heating air incoming to the inlet manifold? :dontknow:

Hairyarse said

I don't know but guess is it anything to do with heating air incoming to the inlet manifold? :dontknow:

thats what my dad thought too !! but thinking about it with the exhaust gases passing the bottom of the pipe it would create a vacuum at the top end !!!!!! been googling for an hour aswell and still nothing !!

Block it up at the inlet manifold and see what happens .

chudd said

Block it up at the inlet manifold and see what happens .

but death and danger may ensue !!!!! !!!!!

anyone with any ideas !! would like to get it up and running !! ??!?!?

its the EGR or exhaust gas recirc system it's part of the emissions control system it reinjects a small amount of exhaust into the inlet manifold where it mixes with the fuel mixture and reenters the combustion chamber. it is used to reduce the nitrogen levels.. we run it on some bikes to reduce emissons. if you want i think it's writen in the haynes manual as to what it is. not willing to say if you can just block it off or not. it may make your car need retuning and may mean its a struggles to pass emissions.

if you block it up the car will need re-tuning, but you will need that anyway with the new manifold on as you will now be on a weak miture anyway. the same as if you vent the breathers to atmostphere…

for the most power you need the cleanist pureist air possible, no impurities to lower the octane value of the fuel (oil vapor does this) or the O2 content of the air, which will again lower the power.

thanx very much guys !!






will leave the old manifold on for the mot then see wat happens after that