Number three with 97 Mondeo Transmission problems - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
 
LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 05-28-04, 07:08 AM Thread Starter
Registered User
 
Join Date: May 2004
Posts: 7
confused Number three with 97 Mondeo Transmission problems

I've read the two threads about other 97 Mondeo problems.

My car (2,5L V6 automatic stationwaggon, originally sold in Sweden) switches strangely when starting from a complete stop, if I run the engine round 1500-2000 rpm constantly. Higher engine speeds does not show the same problem.

It seems as if it shifts very quickly to 3rd or 4th then changes its mind and downshifts again. This may repeat once or twice more.

It doesn't do anything strange above 30-40 km/h.

The gearbox has been completely renovated recently. We showed the problem to the transmission guy, who said that it wasn't his fault after trying several tests. He then took out the gearbox, fitted another one, saw the same problem, and fitted the renovated gearbox again.

If I hold the breake hard and revs up the engine to 1500 rpm and then release the accelerator (still keeping the brake pressed), two things happen depending on the position of the gear selector.

In pos "1" or pos "2", the engine revs up, and then down, with no strange sounds or bumps.

In pos "D", the engine revs up - no bumps - but during the decending rev phase, the car makes a significant bump around 1000 rpm.

The engine speed is ZERO during both above test.

The local Ford dealer (authorized by Ford) did run "the computer" on it and it shows nothing wrong. I don't know if "the computer" can read error codes from the engine control system as well as the transmission control system (I'm told that the car has two boxes, one responsible for the engine the other box controls the transmission)

Another poster talks about a VSS, it may have been replaced:

Ford replaced a "speed sensor", which was accessible from below the car (I wonder why the speedometer wasn't wrong?), this caused a very minor change but not a complete cure.

Another poster mentions an electrical multiplug - which I can't locate anywhere.

Any ideas welcome,
Best regards,
Niels Kristian Jensen
Denmark
NKJensen is offline  
Sponsored Links
Advertisement
 
post #2 of 3 (permalink) Old 06-18-04, 08:35 AM Thread Starter
Registered User
 
Join Date: May 2004
Posts: 7
Re: Number three with 97 Mondeo Transmission problems

Well, the next thing we'll try is to replace the TPS (Throttle Position Sensor, a simple 4K potentiometer) which is replaced together with the throttle flap housing.
NKJensen is offline  
post #3 of 3 (permalink) Old 06-26-04, 02:28 PM Thread Starter
Registered User
 
Join Date: May 2004
Posts: 7
Re: Number three with 97 Mondeo Transmission problems

Replacing the TPS didn't work, but the throtte flap housing was very very dirty with some tar-like substance. The engine seems more responsive to gas pedal movements now, but the erronious shifting is still there - around 1500 rpm on the engine, when starting from complete stop.

Would it perhaps help to clean the MAF sensor (mass air flow sensor) ?
NKJensen is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Trans | Driveline
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
2004 Ford Mondeo Debuts In China Stacy94PGT Ford Contour | Ford Mondeo | Mercury Mystique | Ford Telstar 2 09-22-04 09:35 AM
97 Mondeo Transmission problem nzwards Trans | Driveline 9 07-01-04 12:50 PM
97 HC GLX Mondeo engine Mods RolfW Ford Contour | Ford Mondeo | Mercury Mystique | Ford Telstar 0 09-15-03 04:17 PM
4 speed transmission problems mistressdragon Trans | Driveline 10 04-22-03 03:54 AM
Transmission PROBLEMS...I think? ProbeLX Trans | Driveline 7 12-30-01 11:48 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome