Cologne V6 Runiing Very Rich

[Chrisruck]

Hi all. I have a ford 2.9 cologne engine in my rh2b (No IVA). I took it for an emissions test yesterday and it read 12 on the testers gauge. No matter what he did to the maf mixture screws the reading did not alter. It was the same reading on both sides (v6). It is running very rich and blows out black smoke when revved (You can also smell it's rich). It's not done this before only recently. Any ideas are welcome.

[richyb66]

If it's been stood a while and not been run much (which from your other posts I suspect it has), then you could be looking at a sticky vane inside one of the airflow meters. Both airflow meters go into a single plenum but I don't know if it's divided internally so each afm feeds one bank. If it is and it's rich on both banks, then 2 knackered afm's seems unlikely so maybe consider replacing the coolant temp sensor.

 

Apart from the rich mixture, how does it run when it's warm? Does it idle ok and rev up smoothly?

[Chrisruck]

It sounds like a sierra when running. Can sometimes be sluggish to rev up and down Idle seems ok but difficult to tell

[Chrisruck]

Just tested water temp sensor and its fine. Took fuel pressure reg vac pipe off and it made little difference. Co2 came down to 11 then back up to 12 again. Also getting hard to start it up

[richyb66]

pm sent

[Guest mower man]

Forgive this but I suppose air flter is ok ? mower man

[Chrisruck]

Does the same with and without the filters attached

 

[Guest zerorace]

what exhaust has it got

 

which ecu does it have

[Chrisruck]

It's got 3" pipes with piper cross filters and standard EEC IV ecu.

[Guest zerorace]

if it is the later ecu and not been on a good run the ecu's have a short term memory and need to relearn

 

what is it like when hot (does it get hot) sounds like charge robbing

[Chrisruck]

After a quick chat with richyb66 I'm going to try changing the fuel,pressure regulator and see what happens. Then hopefully my fault code reader will show up and tell me something new! Lucky for me I have another engine to rob parts off

[Chrisruck]

Ok so unless my other fpl is bad then it's not that. Out of interest how much fuel should the fuel rail hold? Also got fault code reader and no faults at all! I'm officially stumped.

[Jez Morton]

Long shot but you could run some red ex or similar injector cleaner through it might be a sticky injector. You also have the option of swapping injectors from the spare motor.

[Chrisruck]

Anything is worth a try. It's worth saying though that all 6 spark plugs are carbon fouled so its something generic to all 6 I think

[stevedohc2b]

Try the map sensor hasit got an engine temperature sensor swap that has it got an air temperature sensor swap that.

Try swapig the Tps

Do one at a time

If you have 2 engines do you have 2 Ecu,s

 

Stephen