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Vauxhall Astra 1.7 A17DT CDTi - Jerking between 75 and 90 degrees - Fixed #

Posted by Shane Gray on October 13, 2016, 7:51 am

Year of Manufacture *: 2011
Engine Size and Code *: 1.7 A17DTJ
( Optional ) Scanner Used: Modis

Morning,
We have this one in with a bad jerking on full throttle when the temperature is between 75 and 90 degrees, then it gets better and you can only notice slight hasation on throttle. It also idles very uneven, fuel pressure goes from 100 bar to
350 bar!
Maf is all over the place on idle (I have fitted a new maf) but still the same.Egr has been removed tested and cleaned, DPF pressures are fine, fuel filter had been replaced and in tank filter checked.
Injectors out next to be tested, then fuel reg?
Any advise please ?
Temp sensor is fine in live data !
No fault codes recorded.
Regards
Shane

Re: Vauxhall astra 1.7 cdti- jerking between 75 and 90 degrees

Posted by steve shaw <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3627' width='330' height='300' border=0 style='border:none;'> on October 13, 2016, 9:13 am, in reply to "Vauxhall astra 1.7 cdti- jerking between 75 and 90 degrees "
Steve Shaw

Hi Shane
have you checked the low pressure fuel supply & the wiring for the frp? or the frp itself. injector leakoff rates which aren't fun, but at 100bar i would expect the engine to shut down

Re: Vauxhall astra 1.7 cdti- jerking between 75 and 90 degrees

Posted by Shane Gray <iframe src='https://members.boardhost.com/ukautotalk8/info/user=ukat3442' width='330' height='300' border=0 style='border:none;'> on October 14, 2016, 7:59 am, in reply to "Re: Vauxhall astra 1.7 cdti- jerking between 75 and 90 degrees "
Shane Gray

Hi,
It's hits 100 bar for a brief millisecond
Then goes back up. Unable to do leak off as my tool doesn't fit! However injectors are out and on there way to be tested.
Low pressure has been tested and all good ! If injectors OK next job will be test suction valve!
Shane

Fixed #

Posted by Shane Marc Gray on January 11, 2017, 8:28 pm, in reply to "Re: Vauxhall astra 1.7 cdti- jerking between 75 and 90 degrees "
Edited by board administrator January 19, 2017, 8:59 am

Hi all,
Sorry for late response on this one.
New fuel reg fixed it .

Regards

Shane

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