[FIXED] Ford Mondeo 1997 20L- Baro

Let me move this thread to the repair section for you!

Sorry I thought it was the repair section?? :oops:

So I've copied and replied to this message with my original questions!!!! :whistle:

How is baro calculated / which sensor gives baro on the above vehicle(does it have a dedicate sensor or is calculated via a map sensor at ignition on and wide open?)

We at sea level or very close to and this thing is reporting baro of 78Kpa(I believe this pressure relates to an elevation of 1800m)

The car has no fault codes, fuel trims long and short are < 10% (less than). no drop outs of accelerator position sensor and it has the nastiest hesitation/flat spot it is so vicious it is like the ignition is be switched of during acceleration.

Any idea of a starting point for this job would be great.

Doing research on this one will be tough, since they don't sell the Mondeo in the US BUT, Wikipedia tells me that the two engines the '97 Mondeo came with are both MAF systems (at least on US model vehicles).

That means it's possible that there is no BARO sensor, and that the BARO reading is actually calculated based off the MAF reading at high loads. Whenever we see a skewed BARO reading on a Ford, we can usually figure there's a MAF problem, or a volumetric efficiency problem.

The trouble is that the symptom you're describing doesn't really sound like a MAF issue to me. More like a cam/crank sensor dropping out intermittently. Unless the MAF signal is dropping out completely, and I'd expect to see a MAF code for that.

Any scan data available during the hesitation/flat spot? Maybe we can spot a good direction to go in from that.

Any scan data available during the hesitation/flat spot? Maybe we can spot a good direction to go in from that.

No I didn't save any because the only thing that stood out was that crazy baro reading!! , I can try get some any particular pids ?

Just thought I'd report back and let you know this on is fixed....turns out the good old visual did the trick we noticed the wire insulation on almost ever sensor and injector has aged/weathered and bearing copper. The TPS wiring was shorting under acceleration. After a dab of silicon around the exposed copper to insulate wires seems to have stop the fault. Why no fault code for this .....why the crazy baro reading....I don't know but the car is running great now!!>>>>>??

Can't argue with results!