am putting a 1800 zetec in a mk3 escort. but it will start up straight away, maybe tickover high but ant tell as no exhaust on the car yet. but it just wont rev up. i am using an inline fuel pump. a lot off the wiring has been cut out as used a mk6 escort loom. i was told i dont need the lamba by some one but i think i may do now. i can not reuse the sensor as wires been cut to short. if i was not to have the sensor in would this stop the car reving up? or could something else be ausing this or anyone had simllare problems. help please as i have a week left to finish the car for the first meet this season. thanks ian.

i don't know the right answer, but since no one else has said anything, the lambda sensor not being there might be affecting the ECUs fuel controlling?

I'd say the lack of exhaust would have more to do with it....to just get it started then the Lambda will have no effect but it may have gone into "limp home" mode..then its a struggle to get them to do much at all. Missing a sensor would have this effect..

should still aleast rev sort of or lumpy without the exhaust shouldnt it. only other thing that comes to mind it fuel lines. im pretty sure got them the right way round ( feed at oppisite to regulator)
am running a inline pump from vw/audi. witch is gravity feed from tank usng about 1/2" pipe witch should be enough?