G60 Digifant Fueling Issues......Very Rich.

[Gti_Jamo]

Ok so just fitted a Rallye 1H engine in my Corrado to replace the PG and now that it's running I can't seem to sort out this issue. The engine is timed correctly as is the ignition timing. I can set the emmisions on idle via the CO pot adjustment at 0.3% but as soon as the blue temp sensor is reconnected it rises above 10% 'and eventually of the scale. Lots of unburned fuel / black smoke from the exhaust. Have tried another temp switch but still the same. Disconnecting the lambda makes no difference but am getting just short of 12v at the multiplug but would a failed lambda cause my symptoms? Also the ecu is getting sufficient voltage also. I'm sure I can figure it out eventually but any pointers will be much appreciated. I don't have Bentley but instead various other books and printouts with mostly conflicting info.

Cheers

[clipperjay]

On G60's of you have more than two sensors fail it defaults to a rich mapp.
Possible the ECU is damaged somehow?
I would check injector looms for damage also they become brittle over time.

[Gti_Jamo]

On G60's of you have more than two sensors fail it defaults to a rich mapp.
Possible the ECU is damaged somehow?
I would check injector looms for damage also they become brittle over time.

Injector looms was replaced as engine was assembled as it was reallly bad. It's what I believe caused my cylinder to melt on previous engine. Other than this is was running fine prior to coming out, not overfueling to this extent anyway.

[Gti_Jamo]

Bit of an update after looking at it today. Still over fueling like mad. Have had to put two jerry can of unleded since saturday and it hasn't even been driven. With the bts (blue temp sensor) disconnected I can get emissions down correctly on idle but it climbs up to 7% CO (reading from test pipe on manifold) on fast idle, plug in bts and goes off the scale with plenty black smoke. I removed the live feed from the bts and ran a wire directly to the ecu and was the same, then i relised it was still the same if i remove the live feed altogether and just leave the earth connected. Stumped, want to try another ecu.

[Simeon]

Have you got an appropriate chip fitted for the injectors? Not got the wrong FPR fitted?

[Gti_Jamo]

Have you got an appropriate chip fitted for the injectors? Not got the wrong FPR fitted?

Hi mate, it's all standard as far as i'm aware. All the same components fitted from previous engine, only difference is the head and block. Certainly wasn't getting this before i ripped it apart.

[Ben@VWH]

G60's are heavily dependent on having all their ground connections in perfect working order.
They are also very particular about voltage, make sure you are getting 13+volts at the fuel rail, distributor, coil etc.

[Gti_Jamo]

Cheers, that has been pointed out to me so going to check that later. I tested the voltage at the battery with everything on an was getting 13.8v but will check everything else. I was getting about 11.5v at lambda, not sure if that's right.

[Simeon]

Also, presume your 1m vac hose for the ecu is present and in good condition?

[Ben@VWH]

Also, presume your 1m vac hose for the ecu is present and in good condition?

This is a very valid point, also worth noting that this pipe MUST be connected to the nipple on the throttle body that is nearest the fpr, the other nipple towards the header tank does not read vacuum correctly.