Fast_CAV

Im new to this Rx7 game...
Just bought a non turbo Mk2 one... 13B it says on the intake manifiold
My Problems are the following...

When the car hits 4K rpm It Just doesnt want to pull on any more... Revs on But has no power...

Somethimes the car is very Jumpy...

It uses enourmous amounts of fuel...

Here is a list of the things that i have done to the car so far..........
The exhaust on the car was totally rotten when i got it So I made my own System form the start of the manifold to the back...It std bore But of a free flow design with no cat... I took off all the air pipes (which i now realise was prob a abd idea)

Was reading about the 5th and 6th ports hoe they can be dirty so have the entire entake system sittin in pieces in my garage now...It is pretty dirty But Can still move freely...
(going to clean it all now...)

A few questions... How are the 5th and 6th ports activated???
How are the 2 aux injectors opperated???
Is there any way of Taking off the 5th and 6th Flaps and all that air injection stuff???
What are the benifits of doing any of the above...???
any Other sugestions very welcome Cuz i dont know alot about theses engines at all...

Another thought... if I simply reconect the Long pipe that goes from the intake manifold to the cat back into the exhaust Will the car pull on at 4K rpm???

thanks
Richard.........

vicious525E

shoulda baught a turbo

Fast_CAV

Where did all the replies go from earlier???

nopistons

Richard - Use the Search function on this site (top of the page, to the right) and look up "3800 rpm hesitation." This is a common problem with the 86-91 RX7's. If your car is a 1986-88, you'll have to get some exhaust backpressure to activate the 5th and 6th ports. Usually, it's taken off the cat by a thin tube.

Fast_CAV

this seems to be a duplicate post...please delete...sorry...
Thanks..