A m8 of mine has a sierra cosworth 4x4 and we have made it ready for mot its std chip and inj the problem is the can rev fine on standstill but when we try to drive the car it constandly cut out and can`t drive
we have checked the TPS but its ok could this be wrong fuel pressure or maybe one of the sensors ??

 

sounds like the map sensor, as when you rev on standstill no boost as soon as you drive no fuel for boost and cuts out

 

okay thanks m8 ill tjek the mapsensor but the car running 1-2 psi cos its going to MOT so could it still be the mapsensor at so low boost ?

 

thats the only thing that sees vaccum and boost

 

ok ill try that thanks m8

 

can we just disconnect the map sensor to see if its the problem?

 

no it wont run, you need to try another 2 bar item

 

no it wont run at all with that disconected you will have to try another on it to see

 

 

 

ok thanks its on a 3bar map sensor but all the parts are std could that be it ?
but ill just have to get a 2 bar mapsensor and try that

 

i had a dog and his name was "BINGO"

it wont run very well if at all, on a 3 bar if its got a standard chip, the voltages are wrong at different boost/vaccum levels

 

thanks guys