90maniac

Active Member

• Dec 16, 2012

• #1

i have a 1986 90 with a discovery 3.5 high comprission engine with rover sd1 inlet manifold and twin su carbs (also from an SD1), the vehicle runs on both gas and petrol, now when it runs on gas you can smell alot of unburnt gas leaving the exhaust but doesnt have a problem when driving, when i switch to petrol it starts struggling, cant accelerate properly sounds like its over fueling to me and eventually the engine dies which makes me think it is flooding in the end but as i am no mechanic is there anyone out there that knows better and knows what issue im having
cheers 90maniac

 

fett

Well-Known Member

• Dec 16, 2012

• #2

is the petrol shutting off when the gas cuts in?

and is the petrol coming back on when the gas shuts off? I would say its doing the opposite of what it should and making it too rich with both on and then with the gas off and the petrol not cutting in its got no fuel

 

Last edited: Dec 16, 2012

90maniac

Active Member

• Dec 16, 2012

• #3

each pump is deffinately switching off mate

 

fett

Well-Known Member

• Dec 17, 2012

• #4

I don think there is a gas pump???

 

90maniac

Active Member

• Dec 17, 2012

• #5

im not sure i seem to have a broken switch now coz i have petrol now but no gas at all hmmmm....

 

fett

Well-Known Member

• Dec 17, 2012

• #6

Maybe I am right and its playing up

even a broken clock is right twice a day

 

90maniac

Active Member

• Dec 17, 2012

• #7

haha looking like an expensive job then

 

fett

Well-Known Member

• Dec 17, 2012

• #8

the switch cant be that much surely?

 

90maniac

Active Member

• Dec 18, 2012

• #9

It's an old one and all the newer ones are different

 

fett

Well-Known Member

• Dec 18, 2012

• #10

ur fooked then

 

90maniac

Active Member

• Dec 18, 2012

• #11

i no gunna go to a gas specialist tomorrow see what they say