mutsnutz
Well-Known Member
I was thinking that any ideas on possible causes
Get up to 50 then reset computer see what is returns then over a run of more than 6 tenths of a mile at that speed. That will be your true fuel usage at 50. If you do a lot of slow stuff stop start in traffic, then do a stretch at 50 it will show your average MPG for all use. Fuel use depends on the terrain you drive over and driving style. People who drive mostly on the flat on good runs at speeds over 50 will get good figures. People who are up hill down dale at speeds lower than 50 will get reduced figures. Check for leaks in fuel return system spills etc.
Musicmaker
Active Member
Going to work in stop start traffic I average 15.8 mpg, still cheaper than public transport. longer runs I get an average of 26-29 mpg. Think I'll try what Wammers suggests reset at 50, 60, 70 just out of curiosity.
A couple of years ago on the way to Manchester airport three adults two kids and luggage. I reset computer at the top of a long hill going down to join M6. At the bottom of the hill it showed 94 MPG. This settled down to 34 MPG at 60/70 on M6. Average there and back was 32 MPG. Unlike government assertions that less speed improves fuel consumption travelling at 30 MPH in these is not very economic.
Those engines often get timing chains streched at high mileage and requires resetting camshaft position. It affects MPG slightly.
This is also a cure for lack of low end and midrange power, if it's slowing on every slight uphill then there is a problem.
What a bugger that you need to remove head(to do it properly with no leaks after) to replace timing chains, rails and sprockets.
This is also a cure for lack of low end and midrange power, if it's slowing on every slight uphill then there is a problem.
What a bugger that you need to remove head(to do it properly with no leaks after) to replace timing chains, rails and sprockets.
mutsnutz
Well-Known Member
The In tank pump is on its way out would that affect the mpg
How do you know that have you checked the flow rate?
Change it then.
