Thread: Fuel consumption V8

If you run the tank below 1/4 full you run the risk of cooking the fuel pump, which being submersible needs the petrol to keep it cool,

Er, to me an intank pump looks exactly the same as an out of tank pump. I don't think that the petrol OUTSIDE the pump is used to cool it. If so why put it in a sump where the HOT fuel return from the engine exhausts?
It's the petrol INSIDE the pump that cools it.
My understanding is that they were put in tank once the technology became available as

1 they are poor at sucking, so at the bottom of a sump in the tank is ideal. Otherwise they need a "surge tank or an additional pump in tank, all extra cost.

2 they need a constant supply of fuel as the fuel acts as the lubricant. Without fuel they overheat but this is a lot lower than 1/4 tank. Also injected cars hate a moment without fuel.

3 it is quieter in the tank.

4 More recently the regulator is in tank and the pump has to be before it.

5 Packaging underbody becomes much easier without a fuel pump to block the way of the now enormous exhausts.

Regards Philip A

Originally Posted by disc94

airflow meter vac hose on wrong way around

Can you explain what you mean the wrong way around?
I thought a hose was a hose?

Originally Posted by HangOver

Can you explain what you mean the wrong way around?
I thought a hose was a hose?

Lack of puncuation there, I think he meant:

Wrong way around, cold start wire on the feul sensor.

theres 2 tubes coming out of the vac advance and it was on the back he put it on the front of it

that was it as well the wires were on the temp sender was on the fuel rail sensor

airflow meter vac hose on wrong way around

Yes if the vacuum advance was vacuum retard it would certainly have an effect on economy.LOL.
Imagine ATDC while cruising , Ouch.
Regards Philip A

its taking longer to start again so will get it back to them to check tuning

EdC,

How the he'll do you get that? I'm on 20L/100k at best around town and that's on 98octane!!!!!