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| | | Forum Technician
 
Group: Advanced Members
Last Login: 05/02/2010 02:13:01
Posts: 294, Visits: 435 |
| | Jeep Cherokee XJ 2.5 TD, Year of Man 1998 Above vehicle came in for service because performing badly and consuming additional fuel. Vehicle serviced and after test driving found that it is losing power. Have checked EGR valve with vacuum and poppet valve is opening. Turbo is working and definitely producing but vehicle is very lazy. I'm thinking Advance Fuel Solinoid or Mass Air Sensor but when checking for fault codes none of these are coming up. Look forward to hearing from anyone who has worked on these and can lead me to where fault could be because without Diagnostic code this could lead to many bits being changed until fault is found. Regards, Diagnut. |
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| | | Forum Master Technician
Group: Advanced Members
Last Login: 06/02/2010 15:10:19
Posts: 1,156, Visits: 1,517 |
| what data readings is the maf returning at idle and 2000rpm? a bad reading usually doesn't return a fault code, only a break will do that.
If I understood women as well as I understand cars, I'd be the envy of every man. |
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| | | Saturday Job
Group: Forum Members
Last Login: 17/01/2010 12:37:45
Posts: 19, Visits: 792 |
| | The dreaded VM engine have have loads of problems with these but first guess if you do not have access to live data is t drive it with Air flow meter disconnected. If performance improves you are on the right track Mark |
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| | | Forum Technician
Group: Advanced Members
Last Login: 05/02/2010 02:13:01
Posts: 294, Visits: 435 |
| | Hi, Could only read codes as no live data available unfortunately. I did however check voltages and can confirm that got 12volts going in and earth continuity but nothing on blue wire which I presume is the feed back to ECU. Will disconnect as suggested and take for a drive and see if any improvement. Thanks, Diagnut. |
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