I have just had my 2wd cosworth re-built - everything.......

its stage 3 as in .. greens, T34 etc ..... it did 3 engine / boost cuts first off, lower down then higher up...... so the map sensor was re-wired and got rid of 2 of them.... so it was then tested with another map sensor which was proven to be Good... it caughed once at 4250 then over the next 4 runs didn't..... So went and bought another map sensor..... now if i toe it 9/10 throttle fine!!!!! BUT when i peddle to the carpet does the cut again at 4250 ish .... almost a boost cut.. then recovers v-quickly and carrys on as normal............ any ideas????????????

HELP

like to add everything is new, leads, dist, coil etc everything

 

check if there is any air getting out at the intercooler (might just be a tiny leak)
That was the problem i had...

 

everything seems to be ok .............. but still happening .... doesn't happen in 1st and 2nd gear just in the higher gears ..... and is ok if i wind it in smoothly and keep it off the carpet!!! but if i nail it it happens sometimes twice in a row one after another then recovers and pulls !!! ???

HELP!!!!!!!!!!!

 

amal valve could be faulty?? just a thought

 

i shall be trying that today ....... i assume i can prove this by simply unplugging the amal valve ..... more lag yes i know but should this then prove it?????

 

HI,

WITH AMAL VALVE UNPLUGGED, LESS LAG, YOU NEED TO CHECK WITH A BOOST GAUGE WHAT BOOST YOU ARE RUNNNING FOR THE CHIP SETUP.TO SEE IF
OVER BOOSTING .

Dave R.

 

are you running non standard leads?

 

What chip you using.............is it a copy?? Plugs and gapping?

 

leads are magnicore ..... chip is an amber performance one i think ... and yes its a copy...... plugs are fine as are gaps i belive..