R33 RB20E not revving

[liam.fredricsen]

Hi, I have a 1994 R33 that I’ve just manual converted and replaced the engine with a good secondhand 20e.

I have a problem where the car is not revving and wants to stall with throttle wide open. The car has no fault codes and is throwing the all ok 55 code back at me.

I have tried a new fuel pump, ecu, AFM, Coil igniter, checked plugs/leads, blocked the return line and it just made it worse.

I’m thinking maybe contaminated fuel as the engine was running before pulling and the only things different are the fuel supply and engine loom.

Any info would be much appreciated!!

cheers

[MBS206]

Just to double check this...

What engine was in the car originally?

[liam.fredricsen]

20E

[joshuaho96]

11 hours ago, liam.fredricsen said:

Hi, I have a 1994 R33 that I’ve just manual converted and replaced the engine with a good secondhand 20e.

I have a problem where the car is not revving and wants to stall with throttle wide open. The car has no fault codes and is throwing the all ok 55 code back at me.

I have tried a new fuel pump, ecu, AFM, Coil igniter, checked plugs/leads, blocked the return line and it just made it worse.

I’m thinking maybe contaminated fuel as the engine was running before pulling and the only things different are the fuel supply and engine loom.

Any info would be much appreciated!!

cheers

Blocking the return line you probably broke the fuel pump or something similar. Dead heading a pump requires very careful pump control to regulate the pressure. 

[liam.fredricsen]

It was briefly with pliers so doubt that would happen 

[joshuaho96]

5 hours ago, liam.fredricsen said:

It was briefly with pliers so doubt that would happen 

Doesn't take much, once the pump hits 120 psi after a second or two the pressure relief valve will pop and the pump will be permanently degraded.