Hi guys have a huge problem I have been trying to run the car but it won t let me. The strange thing is that putting the engine not in gear and picking up the refs it works fine but as soon as you engage a gear and passes 3500 rpm it goes like crazy. It's like when the boost starts kicking in. Any ideas what the problem could be? Crank sensor and phase sensor are at around 800 ohms and water and air temperature is around 4k ohms at ambient temperature. Put in a new set of ik31 plugs and a new set of Motorsport leads in as well

 

What car is it fella?

Luciano

 

Cosworth Yb 4 wd

 

So when you drive the car under boost the car is not pulling? What is the rev counter doing when you load the boost accelerate?

Luciano

 

Yes the ref counter keeps goin up

 

If the rev counter is jumping up and down under boost I would hazard a guess and say you have an engine loom problem, along the back of the engine along the bulk head panel there are some multi plugs within the loom remove/unplug these and spray some lubricant in them and see if this makes a difference, I removed these plugs on my car and soldered the wires together, this solved the problem for about 16 months but ultimately I had to replace the engine loom

Luciano

 

Engine loom has been done recently but will have a look at it any other ideas? Could the readings on the sensors be good but still they can be faulty?

 

TPS needs to be set correctly I'd be looking at that one.

 

Is the map sensor vacuum pipe in good condition ? Or maybe its an aireak on the inlet somewhere.

 

If you mean the engine looses power over 3500rpm, it can also be a faulty fuel pressure regulator.

 

How you set the tps?

 

with a multimeter,connect the middle wire and the upper wire of TPS plug with the multimeter terminals,with close throttle must see about 0.20v-0.28v this is the best setting as i know from mine!

 

I changed distributor cap and rotor arm and problem is solved