im having problems with my 1997 xj6 3.2 fuel pump runs when you first turn the key to prime then goes dead disconnected it from filter and turn key and fuel runs out good then stops even if you turn engine over had pump out and runs well changed relay but still only runs for couple of seconds then stops can anyone give me some ideas please only passed MOT yesterday after been off road for 6 months doing work on her not happy !!!!!!

 

I think that is normal behavior. Ur jag doesnt start? Check for spark, check if revs counter jumps while cranking, spray some carb cleaner into intake while cranking. Report

 

As said, the timer at Ign ON is quite normal.

The dead pump whilst cranking is NOT.

The ECU receives a pulse from CAS (Crank Angle Sensor), and the cam Angle Sensor, this pulse keeps things running, such as fuel pump, engine, spark, etc.

The CAS is a common failure item at "about" 100k milles, no idea why, they just do. The connector for it on the front edge of the timing cover also gets "gunged" up, and causes signal issues.

The Cam Angle Sensor is not a real known failure item, but some have gone AWOL.

Also as asked, does the tacho give a small 200RPM reading as it is cranked. This is a fairly accurate indication the CAS is on the fritz if the answer is NO.

Many, many thread lately about moisture, and water in some cases, ingressing the ECU multi-pin plug/s and reeking absolute havoc.

 

Thank you for your replies, am going to look at her tomorrow, will let you know how it goes.