Menu toggle

Rich Mixture

Mike_Pollock

Mike_Pollock

PCGB Member
Member
Hi Guys

Struggling to work out why my mixture is so rich.

Noticed that fuel pump can be heard (quite loud!), but only on tickover.

Tried driving around with passenger in back, but it can't be heard whilst driving.

Wondering if the FPR is not working, the pressure is building up when on tickover as little is being used, and the pump is then pushing against a high line pressure.

If the line pressure is too high, would that allow too much fuel into the cylinder?

What pressure should a 2.7 run at? (and a 2.5 as I have a spare 2.5 FPR)

Any ideas?

Cheers
 
Exhaust is sooty, kicking out loads of soot all over bottom of bumper etc! Tick over high - fouled plugs and died if reduced.
Checked plugs - VERY black and sooty but not oily.
Put correct plugs in.
Removed K & N filter.
Tightened AFM spring.
Plugs still black! ( but not as bad)

 
Have you thought about changing the coolant temperature sensor for the DME. If the DME htinks the engine is cold = lots of fuel. Other than than that lots of soot on your bumper = owning a modified turbo [:D]

PS that's your photo of my car car from Rutland that I knicked for my avatar
 
I did check the DME coolant sensor with the one out of my old 2.5 and the resistances were the same at the same temps.
Wonder if they should be different?

Thought it was!

Its ok - I wont charge!
 
The Gauge one is only a single pole on the old csr, so I checked the other one on the n/s of the bleed valve elbow.
 
Sounds like it could be your AFM Mike. Worth have a check with a multi meter if you have not. Don't have any values for a 2.7 though for resistance.
Alasdair
 
Engine thinks it is cold or thinks air coming in is cold is where I`d look (as said above)
 
You must log in or register to reply here.

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.

Porsche
Lockton
Pirelli
Officially approved
Oracle Finance
WEX Esso
Collecting Cars
Back
Top