Ford Scorpio Forum - Print Page


    
      
        Ford Scorpio Forum
        (https://www.fordscorpio.co.uk/cgi-bin/yabb/YaBB.pl)
      

        General >> Problems >> Fuel economy
        
(Message started by: Scorpio_Mike on Mar 27^th, 2009, 11:05pm)

Title: Fuel economy
Post by Scorpio_Mike on Mar 27^th, 2009, 11:05pm

Noticed recently my fuel economy has been dropping a bit.
Currently averaging around 19 - 20mpg with mixed driving - was getting 23 - 24 a few months ago.
I'm quite careful with the ol' right foot, no traffic light GP's

Car is a 2.3 auto Ultima estate.

Any tips of what to check first ?

Title: Re: Fuel economy
Post by Tompion on Mar 28^th, 2009, 12:49am

Injector cleaner may help, but unlikely to make a big difference unless you’ve not used it for a long time.

I recently had a small exhaust leak between the manifold & cat that seemed to drop the mileage by about 2 mpg.

Stat? - does the engine warm up quickly - even if it does a faulty engine temp sender will have an effect.

Title: Re: Fuel economy
Post by Jonnycab on Mar 28^th, 2009, 2:47am

Faulty ECT or IAT causing cold fueling, or possibly a blocked air filter ?.....also binding brakes :)

Title: Re: Fuel economy
Post by Simmo on Mar 28^th, 2009, 7:56am

Have you cleaned the MAF Mike?. :)

Title: Re: Fuel economy
Post by Highlander on Mar 28^th, 2009, 2:25pm

been serviced recently? old spark plugs will do that too ;)

Title: Re: Fuel economy
Post by Scorpio_Mike on Mar 28^th, 2009, 10:27pm

on 03/28/09 at 02:47:29, Jonnycab wrote:

Faulty ECT or IAT causing cold fueling, or possibly a blocked air filter ?.....also binding brakes :)

What are ECT & IAT ???

Brakes not binding, will check MAF + air filter and change plugs.
Oil change was done a few months ago when the car was MOT'd.

Title: Re: Fuel economy
Post by gozz on Mar 28^th, 2009, 11:13pm

Mike.
Water and inlet air sensors informing the ECU,or as it is now known,PCM power control module !
GOZZ.

Title: Re: Fuel economy
Post by Simmo on Mar 29^th, 2009, 6:31am

Mike. The details of the units are HERE (http://www.fordscorpio.co.uk/ectdata.htm). The inlet air temperature sensor is fitted,on mine, in the underside of the air trunking just prior to the throttle assembly. ;)

Title: Re: Fuel economy
Post by Tons_of_fun on Mar 29^th, 2009, 3:26pm

When i first got the cossie it was doing about 17mpg under mixed driving. changed the plugs, air filter & cleaned the MAF, im now getting about 21mpg with 29.3 at a controlled 65mph. Not too bad in my honest opinion ::). One thing i have noticed though. If i try & keep the engine under 2000rpm ( yep quite difficult), it makes a world of difference to the economy. Only downside is people behind you keep shoutin "Take your handbrake off " !!!. At 90p per litre they can shout all they like ;D ;D ;D