haha cheers mist, the car is fast. checked a load of stuff but still doin it. apart from that nice

You broke it already! :lol:

bring it round mine and ill see what the ecu is saying.

cheers for all your help grease monkey, i'll go disconnect the battery right now and give it a try a little later,engine was'nt doing this in the astra so im sure it can be sorted

If ya ECU light has come on it will have logged a fault, unplug ya battery for an hour to clear the fault code of it might cause ya problems, when ya start the car do it without touching any of the pedals for a minute as the ECU will read all the sensors and set its self up, some people say this is a waste of time but most might reccomend it. If ya wanna know what the fault is ya in trouble cos i bet the diagnostic plug was not wired in on the conversion, dunno what ya do about reading the fault as you can normally do it at home with a paperclip

cheers guys, i will go check a few bits on it see what is wrong

Revs dropping will be ya car going in to limp home mode possibly, i used to boot my motor up to 7500rpm and the ecu would throw a fit saying injector valve high voltage as the rev limit had changed and it thought it was delivering too much fuel, which it was as it happens

plugs leads not secure..

air leak

temp sensor?
lambda sensor?

i put it in first gave it some was just about to change into second and the engine management light flashes and the revs go straight down makin the car jerk ? hmmmm :boggle:

tried again same again and again, whats causin this