resistance problems 2002 jaguar S type

[Dave rainey]

only DTCs i am getting if for the MAF sensor ERG has its own DTCs yes checked filter all okay and no it is petrol

Cheers
Dave

Poor starting and poor running could be lots of things , but as I suspect your MAP sensor has shown a fault and replacing it has not helped, it may be the EGR valve as the diagnostics are cumulative. A diagnostic sweep may save you hours of time searching for faults that are not there.
Is the air filter clean? Is it diesel?

 

[Shoei]

As others have said modern engines have a long list of ways to go wrong. Just a couple of comments, it's best not to grease connections until after they're assembled and tested, grease doesn't conduct. I doubt that's a problem but one to bear in mind.

If you suspect the MAF, most engines will work pretty well with its cable unplugged, the ECU does a fair job of guessing airflow so seeing how the engine runs without it connected is worth a try, to eliminate the MAF as a problem.

 

[PEG]

Hi,there are other factors which will cause the ECU to assume a MAF fault,even if it is functioning correctly. This gives the ECU information regarding the amount of air,passing through the intake system,in relation to other factors.
For example,a blocked or restricted exhaust,could flag such faults.

You may require the services of a clued up dude with a proper machine,not just a code reader.

 

[static zap]

For example,a blocked or restricted exhaust,could flag such faults.

..Ah expensive memories ,an unexpected hissing noise ,just after cranking .. (that was even before ECU's, cats & dpfs came along)

 

[ruston]

An old diesel engine was the simplest most reliable economical engine ever, just look what they have done to it. As for ecology , scrapping good roadworthy cars because they are electronically beyond economical repair does,to me benefit the manufacturers not the earth .
Sorry @PEG got me into the rant mode.