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        General >> Problems >> erratic over run
        
(Message started by: Torbayboy on May 30^th, 2018, 11:29am)

Title: erratic over run
Post by Torbayboy on May 30^th, 2018, 11:29am

Hi, 97 cos estate, on overrun the engine surges occasionally occurs above 25mph and below 55mph other times when you take your foot off the accelartor the revs just settle. Had a little of this in my 95 cos saloon but cured itself as I drove it more regularly.

Possibly a different issue is on tickover mainly when hot after 10 or so seconds the idle adjusts dow by 50+ revs and stays there, blip the accelerator and it repeats the process.

Runs fine other than this showing 27 mpg on non motorway runs and does what is asked smooth autobox changes - nice drive.

Any help or suggetions please.

Title: Re: erratic over run
Post by Scorpio_Mike on May 30^th, 2018, 1:22pm

Check the throttle butterfly moves freely and the accelerator cable is not sticking also check for weak or corroded return springs in the linkage.
Might just need a drop of oil somewhere.

Title: Re: erratic over run
Post by Simmo on May 30^th, 2018, 1:23pm

Clean the MAF (http://www.fordscorpio.co.uk/cleanmaf.htm) ;)

Title: Re: erratic over run
Post by PJDavis on May 30^th, 2018, 10:52pm

on 05/30/18 at 13:23:19, Simmo wrote:

Clean the MAF (http://www.fordscorpio.co.uk/cleanmaf.htm) ;)

I concur

Title: Re: erratic over run
Post by Torbayboy on Jul 6^th, 2018, 11:42am

Re clean the maf, any carb cleaner (car plan stp wynns)? best to go for??

Thanks

Title: Re: erratic over run
Post by Nunnspoet on Jul 6^th, 2018, 12:09pm

Hi. Go into "Servicing and Repairs, look down the left hand side of the page, click on Engine, and in the page now displayed click on the piece dealing with the MAF.

Good luck

Mike

Title: Re: erratic over run
Post by Torbayboy on Jul 22^nd, 2018, 7:22am

Cleaned the MAF seems a lot better now Thanks Guys