MPG DROP (im stumped)

[littlefeller]

do you have a service light on?
after a drive put your hand on the rear wheels, are they warm/hot?

 

[MAURICE THE MARTIAN]

Well started to check the blanking caps in fig 3. Pulled one off .guess wot.
Its now down in the bottom somwhere
Arrrrrrgh

 

[MAURICE THE MARTIAN]

A little update .well after spending nearly £600. On new maff.o2 sensors etc and 6mths doin mi fk head in i think the prob may be solved for the sum of £6. ******** hell. Changed the 3 rubber blankers on the bulkhead side of the inlet manifold as sugested by Murray Wall and seems to have cured it .on the run up to Ayr via the dales uphill n down dale not hanging around 27.9 mpg.on the blast thro galloway forest 2nd 3rd gear red line driving over 100ish miles 25.1 mpg then home at a steady 79mph 33.6mpg so im happy wi that.
Cheers Murray.
M

 

[Antm72]

Great news Moz its always that dam cheap bit that gets missed
Glad its resolved though great work

 

[billz]

We will see how good the MPG is on our Euro Trip. If i remember right you always have the worst MPG

 

[pgunter]

I have started logging my 3.0 fuel to see what sort of overage I am getting. Funny thing is when I visit the Zed Shed with @Lee and @GazHyde not forgetting @Oldguysrule my fuel seems to plummet... @Nodzed do you suffer from this when visiting the Shed too ?

You average should be better than mine @MAURICE THE MARTIAN as you would of course drive more gentile....

 

[DavidM]

Good advice from @Murray Wall and great outcome - great!

 

[Nodzed]

I have started logging my 3.0 fuel to see what sort of overage I am getting. Funny thing is when I visit the Zed Shed with @Lee and @GazHyde not forgetting @Oldguysrule my fuel seems to plummet... @Nodzed do you suffer from this when visiting the Shed too ?

You average should be better than mine @MAURICE THE MARTIAN as you would of course drive more gentile....

Yes mate its scary what the thicker air does to the old girl down south, cant think what else it could be

 

[Mint]

If i remember right you always have the worst MPG

That's because of the lead in his right foot

 

[Bozzy]

Good news Moz,glad you got it sorted with Murray's help .

Steve

 

[t-tony]

Could you post some pictures and part numbers of the bits you changed please Mozz. Might be worth checking these on mine if only due to the age of my car?

Tony.

 

[MAURICE THE MARTIAN]

Ther u go mr T.

 

[Nodzed]

is this specific to the Z4 engine?

 

[MAURICE THE MARTIAN]

is this specific to the Z4 engine?

Tbh im not sure have a look at murrays pic he posted on this thread .for location.an check yours .sure murray will b along to clarify

 

[MAURICE THE MARTIAN]

No 15 n 17 in pic

 

[MAURICE THE MARTIAN]

This little buggarz 2x3.5 mm + 1x7mm
Which is still lost int engine bay

 

[billz]

I see you have stocked up on the Desperados for when i come up mate

 

[MAURICE THE MARTIAN]

Ewe noticed

 

[billz]

Of course mate never miss a Desperados

 

[NZ00Z3]

Pleased to see that you have fixed it and that my pictures were helpful.

The style of manifold that has the ports and blanking plugs are fitted to the M52TU and M54 engines. As the M54 engines are fitted to Z4's, then this issue also affects some Z4's that have the M54 engine.

I have not had any experience with the N52 engines in the later Z4's so can't comment on them.

Enjoy the summer driving and Euro tour.