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Mondeo stuttering - the latest

Hi,

a few weeks ago I posted on here asking if anyone had any suggestions as to why my Mondy diesel was stuttering around the 1500rpm mark. I tried the suggestions given, with no result, and had to resort to putting it into the garage. SO far, it has needed a crank position sensor, an injector sensor, and now it's waiting for one of the injection pump sensors to come in.

The chap at the garage tells me that the diagnostic computer steps through each sensor in turn, and stops when it gets to a faulty sensor, which then needs to be changed before it will scan the next one.

The latest question, then, os for anybody who knows Ford's diagnostic computer. What order does the computer scan the sensors, so I know if it's failing at the first three (so far), or if we've reached the end, and the pump sensor is the last one?!

I still think that the closest a computer should come to a diesel engine is loaded in a cardboard box, on the trailer bed of the truck which is pulling it.!!!!!

Gary

Reply to
Gary Cavie
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No, thats bollox. The WDS2000 will show all the fault codes one after the other never mind how many are present. The scanner does not "test" each sensor- it cant test a passive component- only an active one in the (KOEO mode), such as the egr valve, air con clutch, etc.

Sounds like they didnt cancel them all and see which come back after a test drive. Putting the scanner into Live capture and going for a drive would show them readings from various sensors, and anyone worth their salt would be able to see if the signal is acceptable or not.

Tim..

Reply to
Tim (Remove NOSPAM.

Sounds to me like they're replacing each sensor 1 by 1 until they find the problem! Why (for instance) change the crank sensor if the car is hesitant at 1500 rpm? If it works below/above that speed then there's nothing wrong with the sensor. Trouble is, you'll then end up with a nice set of shiny new sensors and a hefty bill to go with them! They won't reinstate all of the sensors they didn't need to change in the first place :-(

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Reply to
Paul King

Thanks for the info Tim,

The car is now back, and running like a dream. The final tally was the three sensors, Crank position, injector sensor (which only comes with a new injector...) and the solenoid on the pump - not the stop solenoid they say, but one underneath?

They're going to post the bill to me, so I don;t know how much to expect yet, but he did say that the crank sensor was about £18, the injector about £90 and the pump one about £110.

Guess I'll just have to work harder next week :-(

Thaks for the advice.

Gary

Reply to
Gary Cavie

The message from Gary Cavie contains these words:

That sounds a lot like the scatter-gun approach to fault analysis.

Reply to
Guy King

The solonoid on the pump is the advance / retard control which could well give you the symptoms you had.

Tim..

Reply to
Tim (Remove NOSPAM.

Ah, right thanks. I know all these computers and gadgetry on modern cars are supposed to give more economy etc, but I do wonder if the savings over the lifetime of a car due to the management platforms actually offset the costs of having them.

Do the prices above sound reasonable IYO?

Gary

Reply to
Gary Cavie

Good to Cheap to be honest. You should see the price of a VAG no.3 injector

  • needle lift sensor combination...you wont get much change out of £250!

Tim..

Reply to
Tim (Remove NOSPAM.

My first car was a Golf diesel - 1979, no management system, just a squirt of diesel, a bit of compression and away it went.

Suppose that's progress!

Reply to
Gary Cavie

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