Hi, a friend off mine have a problem with his stage 4, 93' Escort Cosworth, it starts fine from cold, but it "dies" after a few seconds, unless he use the throttle. when warm it is ok(except it seems to be a bit lean under 2500 rpm). Map, cts, ats, tps, iscv tested and found ok..... Mainly it's under warmup the problem is pressent.....help needed

 

can you hear the ISCV clicking when you go to position 2 on the ignition when the fuel pump primes up? thats assuming its abig turbo one.

 

Yes, there is "clicking" from iscv in pos 2.....and yes this is a big turbo model.

 

could be the ECT (engine coolant temp) sensor tellin gthe ecu that its warm when its not , about 15-20 quid from woodford garage and the likes.

a quick check... its resistance when cold (20 dgc) should be 3.75Kohm, droppin gto 0.38Kohm when at 80deg(normal runing temp)

the ect is the small blue sensor underneath the inlet manifold at the back of the engine - bit of a tw@t to get to and it scres into the head with a copper washer sealing it to the head .

 

He tried to change both, the blue water temp sensor and the brown air temp sensor....no change

Also the map, tps, iscv tested and found ok....

 

Hmmmm...???

 

has he aquired this problem since fitting a chip or injectors or map sensor?

 

I dont know, but I'll ask him. Any idea what it could be ??

Tom