hi
i have a sierra sapp cossie recplica engine was running well when it was on the other car now its over fueling too much .any hint with this? please
don't know i sure i made all the wiring good the olly plug that i didint find where to plug it is a white plug intake manifold side near the gearbox side does it have something to do with this?

10x rick

 

What engine helps

Steve

 

hmm ok cosworth 205 block of an 89 sierra sapp cosworth this helps ?

 

are you running a cossie loom???? temp sensors etc???

 

If the white plug goes to the distributor so you don't have the phase signal it will over fuel massively.
The plug that goes to the side of the intake plenum is brown for the air temp sensor.
I would if it's not new fit a new coolant temp sensor, at rear of head below inlet, a blue sensor, next to a 1/2" water pipe.
tabetha

 

yeah cossie loom (webber ecu) the plug in at the rear not near the distributor , the distibutor plug is connected ok i tried it on 1 bar fuel pressure and still the same 10x for helping btw

 

Check the MAP sensor pipe is A) connected and B) not split.

Martin

 

mechanic told me fuel pump relay anyone knows where it is?10x

rick

 

LOl what the fuel pump relay causing over fuelling? If the car runs fine there is no need to touch the fuel pump relay.

Have you had the fuel pressure checked?

Martin

 

fuel presure is 3 bar. relay he said is like a regulator . when the engine is running idle it will send less fuel ..... the engine is over fueling badly that it wil need to take plugs out to restart bores get flooded hope this helps

 

Hmm wouldn't let that mechanic near my car! Fuel pump relay is switched on/off by the ecu (pin 28), it doesn't send a variable voltage to it, it simply earths the relay.

Is your tps connected? Or as mentioned above the ect sensor (blue) might need replacing or plug to it maybe faulty, if the ecu doesn't detect ect signal it will overfuel as it thinks it's cold so pumps extra fuel in.

 

it dose it when its cold it starts only ones revs idel about 1500rmp i connected the tps and still the same

 

Have you got the ICV and Cylinder 1 Injector plug the right way around? There both white and easy to get mixed up, I've done it several times!

 

He actually talking about the regulator this is a mechanical device and the only thing that can vary fuel pressure, you can see this if you look underneath the bonnet, it sits between the fuel feed and the injector rail. It increases the fuel at a 1:1 ratio.

Martin

 

fuel pressure regulator ........ that is set at 3 bar i tried to drop it 1 bar but still the same

 

the blue plug at the right side back its a water tep censer for the ECU try a new one in there they are only cheap