High fuel consumption 2003 Jazz SE 1.4 CVT-7

[guest5309]

Hi fellow Jazz owners!

I'm wondering whether I'm the only one having an unusually thirsty engine. Ive got a 2003 Honda Jazz 1.4 CVT-7.

I measured that for urban driving the values are 9.6l/100km (29mpg Imperial).

I am not a jerky driver and I enjoy driving smoothly so I do not think I have a heavy foot.
The car just had a full service done (filters,  oil, spark plugs, etc.). The measurements above were taken after the service.

My dealer suggested I have the valve clearances adjusted. They say that will cost me £100. A fellow forum user said that this particular service runs above £300 so something smells fishy. Should I do it with having any hope that my mpg will drop?

Thanks!

EDIT:
I rung a few other Honda dealers to ask for a price on a tappets adjustment. They quoted the same £100 so maybe it's legitimate. I'll go for it and will report on what happens later.

[guest2913]

mine at the moment is running rich with the odd pop and misfire and had a computer to find cylinder 1 and 4 are something with small misfires! strangely enough is getting 29mpg to 32 haha

[guest4512]

That is heavy fuel economy,  try seeing if there are any fault codes.  You can buy OBD2 scanners very cheap.

[guest2913]

I've got one, paid about 100 pound, does help but has basic function

[guest5309]

Update on my case: after the valve clearance adjustment my average fuel consumption dropped to 41.6 mpg (6.8 l/100 km) !

[guest2913]

Ah I'll have to give that a try but time been my bank balance is 0 hahaha

[minibreakdown]

Hello JazzyJames_93

Just the other week I took my wifes jazz out for a run and the mpg was down to 39mpg from it's normal low 50's. When I got back home I felt around all four of the alloy wheels with the back of my hand and found the rear nearside a lot hotter than any of the others.

Cause - binding brake caliper. Brake wasn't releasing fully, more friction, causing heat and lower mpg.
fix - bought new seals kit from ebay.

Refurbished caliper last weekend and now back to 52.3mpg as of this morning.

worth a look.

[guest2913]

It's had in annual test and front left was rubbing the tester said but the car misfiring when it gets warm but passed its emission test aswell so i think the coil packs are packing up, what do anyone else think?