vg30e problems

[Lang Inder]

Have recently bought a 1994 nissan terrano powered with the vg30e from factory, problem is it drinks an abnormaly large amount of gas ($40 does about 70km). Have serviced it, new spark plugs, new genuine thermostat, new o2 sensor but no change. Is there any common problems that could be causing this???? (apart from a hole in the fuel tank)

[torqued]

Beautiful motors.
I too have a d21 Vg30e and yes its thirsty wee pig. especially when opened up

Possibly stick a o2 sensor up its bum and check readings?

[Lang Inder]

Beautiful motors.
I too have a d21 Vg30e and yes its thirsty wee pig. especially when opened up

Possibly stick a o2 sensor up its bum and check readings?

k, but thats the thing i am not even driving it hard, going easy as everywhere, we live out of town so its getting long runs not just round the streets in town.

My parents have a similar truck but with the td27t and it's waay better on gas

[torqued]

Have you checked the ECU error codes?

Ill assume you havnt.

Find ECU,
Start Motor,
Turn on diagnostic mode on ECU
- Find the selector turn dial fully clockwise
Check LED flash after 3 flashes turn fully anticlock wise
Red light is the L/S number and green is R/S
EG - 4 Red followed by 3green = 43 TPS sensor

Let me know and ill look up table

[Bartman]

It could have a leaking injector?

[Lang Inder]

Have you checked the ECU error codes?

Ill assume you havnt.

Find ECU,
Start Motor,
Turn on diagnostic mode on ECU
- Find the selector turn dial fully clockwise
Check LED flash after 3 flashes turn fully anticlock wise
Red light is the L/S number and green is R/S
EG - 4 Red followed by 3green = 43 TPS sensor

Let me know and ill look up table

had already done that, has no fault codes

[Lang Inder]

It could have a leaking injector?

thats what i was possibly thinking, how do you test them, apart from pulling them out and sending them away for flow testing?

[torqued]

Id still put it on a tuning scope

[Bartman]

Hand held wideband meters are getting quite cheap nowdays.
Absolutely brilliant tools. I always meant to put one on my a31 slofiro to see why it was such a thirsty pig, But I just sold it instead.

[ratsun81]

Did you get a genuine O2 sensor put in or just one of the generic ones? Sometimes the generic ones can cause issues as well.

AFM could be dirty/faulty giving incorrect air signals to the ecu as well.....


Agree that sticking a wideband o2 on it will give you an idea if its spitting too much gas in.