Can anyone help my connect van has a problem with engine revs not returning to idle speed after accelerating,the tick over revs increase to various speeds intermittently the only way to remedy it is to switch of and then restart which will resolve the problem until it happens again this is becoming more frequent as time goes on,could this be an accelerator pedal electronic problem? is there any way I can test .

4 hours ago, Alan3 said:

my connect van has a problem with engine revs not returning to idle speed after accelerating,the tick over revs increase to various speeds intermittently the only way to remedy it is to switch of and then restart which will resolve the problem until it happens again this is becoming more frequent as time goes on,could this be an accelerator pedal electronic problem? is there any way I can test .

You can directly monitor the APP (Accelerator Pedal Position) with Forscan or other diagnostic aids like Torque. Look on this site for more info, or I can provide it if wanted.

It is correct to look at the APP first, because idle speed is not governed by any throttle valve, just by the fuel injections, which are constantly adjusted by the ECU to maintain the correct RPM.

Oil leaking past piston rings, or through valve seals can cause raised rpm. This would usually show as increased oil consumption.

Possibly a leaking injector would also raise RPM. An injector "leak-off" test can sometimes identify faulty injectors. (Though this test only checks the 1st stage of the injector, not the main valve seat that allows the fuel into the cylinder.)

Alternators can have odd effects, on a Vauxhall van a neighbour had, a dodgy alternator prevented the accelerator from having any effect at all, so maybe check for any charging system faults.

Hi Peter

Thank you for your reply,the problem use to occur say once a month but has gradually got worse and is now happening a couple of times a week the revs seem to stick at about 2000rpm and  nothing I can do will reduce the revs to tick over ie 900revs I have tried to increase revs while the problem exists hoping they will return to normal but no such luck.Other than over reving there does not appear to be anything else affected , when I switch off and restart all problems have disappeared until next time .Presently I am waiting until the problem exists permanent then hopefully the problem will be easier to find,I am retired and am not totally dependant on the van however I would like to know more about Forscan ie what is it and is it something I can do myself? And what would I need .

There is no sign of exsessive oil consumption and no smoke of any kind and it starts straight away every morning and alternator is keeping battery fully charged considering I only do 100 miles per week in the van.The problem just seems to have an electronic bias and that was my reason for thinking about accelerator pedal it would be an advantage if I could somehow eliminate any pedal issues 

Many thanks Alan

2 hours ago, Alan3 said:

The problem just seems to have an electronic bias

From what you say about the switch off & on to clear the problem for a while, I would agree with the electronic / software bias.

Forscan is a powerful Ford specific system, Cost is about £18.00 for the ELM327 interface. It needs a computer of some sort. (USB, Bluetooth or WiFi ELM327s available). You will find a lot about ELM327 & Forscan on this site, which together provide a very comprehensive diagnosis & maintenance tool. James (jeebowhite) has done a nice guide:
https://www.fordownersclub.com/applications/core/interface/file/attachment.php?id=58645

The Tunnelrat ELM327s have been reported to work well by several people, and are stated to be compatible with Forscan and ELMConfig.
https://tunnelrat-electronics.fwscart.com/

Forscan works best on a Windows laptop, with a USB ELM.  Forscan is also available for iOS & Android for some tablets & phones, using USB if available, or Bluetooth or WiFi ELMs. But there are some limitations.

Wireless ELMs are often not as reliable as the wired ones. Also they are rarer in the "modified" form which is needed to access the 2nd Ford bus system. This 2nd bus is the MS-CAN bus, and links all the car interior electronics like door modules, and the BCM (aka GEM). But a standard ELM will still work with all the Underbonnet Modules (PCM, ABS etc) and with the IC (Instrument Cluster), as these are on the main HS-CAN bus.

The Forscan programme is free in Windows format, or small charge for App format, and you can get it from:
http://forscan.org/download.html

One potential problem I have noticed, is that 2002 is a rather early date, before OBD compliance was required for Diesels. There is one mention of a 1.8 2002 year Transit, and the site calls it "pre-CAN". So Forscan does cover the vehicle, but I don't know how many functions are available.

Thank you Peter for your help I will let you know any further development with the problem as I move forward.

Many thanks Alan

I would just add that the tunnel rat code reader can be used on other makes of car also so consider that when thinking about if you will get your money’s worth. There is free software that will work on other cars.  It’s a very handy thing to have. Everyone should have one in their tool box or glove box