You should upgrade or use an alternative browser.
MPG
- Thread starter 944 LIL
- Start date
morris944s2john
New member
If you are getting 18mpg either you have boots of lead or something is wrong- check the air filter is not blocked!
peanut
Active member
With such a high MPG I would check the fuel rail pressure relief valve .If its not relieving excess fuel pressure then your injectors will be passing too much fuel. I would expect your engine to smoke a bit on hard acceleration and possibly on startup. You could get the garage to do a fuel pressure test. Clarkes garage workshop manual has the pressure ratings
944 LIL
New member
The line came from a guy I met at rugby with my son this morning - known him for years - but as I run a different squad have never really had a chat.
I mentioned LIL just after he told me he had a Ferrari 355 - he also has an Alvis (I think) from 1910, something from 1911 and a 1927 Buggati - and just for good measure a 1928 Buggati.
He more than anyone needs to be economical with the cost truth !!
Black Beauty
Member
petrolhead944
New member
Suffolk944
Moderator
That does sound poor, mid 20's upwards would indeed seem to be the norm.
sawood12
New member
If you drive like a Nun and suspect there is something amiss with your car then there are a few things to check:-
Tyre pressures
Wheel alignment (are you getting equal tyre wear across the width of your tyres)?
Weight - are you carrying alot in the car e.g. stuff in the boot
Do you drive with your window open? This can cost you 5%! (I doubt it in this weather though).
You could also take your car to an MOT garage and ask them to check your AFR to see if you're running particularly rich. It could be something is throwing your fuelling out.
Check for binding brakes (though you'd probably be getting other signs if this was the case, like it pulling to one side, smell of hot brake lining, blueing of the disks).
Does your handbrake fully disengage?
Ummm, yes, I think you should certainly change the front tyres immediately. The ones on there are ... not healthy. And the fronts do the majority of the braking, and you don't want to be over-working the ABS without good reason, eh?
The make that both James and I run is called Falken, and the model FK452. They are excellent. I can't remember what width you have at the moment but you need to maintain the rolling radius (the radius from the centre of the wheel to the outside of the tyre), and there are various on-line tyre calculators to help you do this. (One can be found here:
http://www.carbibles.com/tyre_bible.html
... along with more than you ever needed to know about tyres - it's an educational read.) I would suggest that you reduce the width of your front tyres - I can't remember what they were, but they looked too wide for the car to me.
Anyway, James will be along soon with some much better suggestions, and some real numbers. He'll offer much better advice, I'm sure.
Oli.
ETA: Having a different make of rear tyre to the fronts is not a problem, but they should be the same on an axle (i.e don't have two different tyres on the front, or on the rear.) As I remember, your rears were OK, but an unknown make. I'd probably just enjoy sliding the car around for a couple of months, getting rid of most of the tread, and then replace them.
James_G
New member
ORIGINAL: 944 LIL
James
remind me again - what was your recommendation for size and make? Should the rear tyres be the same?
Apologies Colin, have been busy with the DIY so not been on here recently. Oli is right, in terms of matching tyres on each axle line, but his memory must be fading a tad ([
Let us know how you get on.
Cheers
James
![PCGB - an official Porsche Club](https://www.porscheclubgb.com/forum/stamp.jpg)
Posts made and opinions expressed are those of the individual forum members
Use of the Forum is subject to the Terms and Conditions
Disclaimer
The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.
Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.
When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.
Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.
Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.