Thread: 3.5 injected disco blows black smoke

How many Ks? When did you last change the injectors?
Regard sPhilip A

Originally Posted by PhilipA

How many Ks? When did you last change the injectors?
Regard sPhilip A

I'd check the injectors also.
Cheers
Shane

Convert it to gas, its much cleaner.
Failing that, Bosch yellow-top 4 hole injectors from the US, eg:

MUSTANG 5.0 4.6 V8 T-BIRD FUEL INJECTORS UPGRADE 19LB | eBay

totally origional with 170,000ks

dose the 3.5 use the same injectors as the 3.9????

there are only 3.9 injectors for sale in the us

Originally Posted by starky

dose the 3.5 use the same injectors as the 3.9????

there are only 3.9 injectors for sale in the us

I believe the 3.5 Disco does. THe RRC version of the 3.5 is earlier and does not.

The other thing to do is to check your fuel pressure at the rail. Regulator failure is not unknown. I had a Falcon XG ute in the other day that was sucking neat fuel up the regulator vacuum hose, amounting to a cupful every couple of minutes. Pull off the vacuum hose and check for fuel.

Some tuning of mixtures can be done with an adjustable pressure regulator. They often come with a pressure gauge attatched and are available on ebay for ricer cars.

Black smoke is usually over fueling, therefore you need to check your fuel and fuel control system. As has been said the injectors could be the problem as could the fuel regulator. I'd also be looking to clean the Airflow Sensor and maybe changing the air filter and poss the fuel filter (can't remember if one is fitted on your model) though a blocked or faultly fuel filter usually causes fuel starvation but strange things can happen. Once this has been done check any cold start features your motor has and then it's onto the hard stuff.

Not much point in getting LPG until the basics are right as you may compound the problem and start chaising your tail.

Originally Posted by 56S1

Black smoke is usually over fueling, therefore you need to check your fuel and fuel control system. As has been said the injectors could be the problem as could the fuel regulator. I'd also be looking to clean the Airflow Sensor and maybe changing the air filter and poss the fuel filter (can't remember if one is fitted on your model) though a blocked or faultly fuel filter usually causes fuel starvation but strange things can happen. Once this has been done check any cold start features your motor has and then it's onto the hard stuff.

Not much point in getting LPG until the basics are right as you may compound the problem and start chaising your tail.

Air filter, fuel filter, AFM, coolant temp sensor all new. i even replaced the thermostat to make sure it was not running below operating temp.

i don't know of any cold start features though??????