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Old 17-03-18, 10:26 PM   #1
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Default 807 judder

hi guys, my 2008 807 2.0hdi se has developed a judder type of feeling when you accelerate through 3/ 4 sometimes 5th gear, almost like the front end is bouncing & the engine is holding back some power, not sure where to start investigating ?, has anyone got any ideas please. thanks.
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Old 18-03-18, 09:21 AM   #2
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Hi.

Have you checked the spark plugs, leads, boost and vacuum hoses at all?
All of which can cause the engine to hold back when under more load.
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Old 18-03-18, 01:53 PM   #3
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Inner driveshaft joint can do this if its only under load and engine seems to run fine check the inner joint on drivers side for wear
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Old 20-03-18, 08:53 PM   #4
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Quote:
Originally Posted by 1arm1legDan View Post
Hi.

Have you checked the spark plugs, leads, boost and vacuum hoses at all?
All of which can cause the engine to hold back when under more load.
Hi,
Thanks for your advice, I've got a 2.0hdi se diesel, checked the hoses and found that the breather hose from the rocker cover had come off, so i plugged it back into the air intake (where it came from) but it still hesitates on load in 3/ 4 @ 2000-3000rpm i wonder if some injector cleaner may help clean things up? The bus accelerates fine in 1st/ 2nd. I'm stumped..
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Old 20-03-18, 08:56 PM   #5
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Quote:
Originally Posted by 1arm1legDan View Post
Hi.

Have you checked the spark plugs, leads, boost and vacuum hoses at all?
All of which can cause the engine to hold back when under more load.
Quote:
Originally Posted by reliable406 View Post
Inner driveshaft joint can do this if its only under load and engine seems to run fine check the inner joint on drivers side for wear
Hi, Thanks for the advice, do you mean check the uni joint for play, spline into the g/ box ?
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Old 20-03-18, 09:10 PM   #6
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Some 2.0 HDI's have a small link harness from the fuel rail sensor which drops down behind the starter motor heat make the insulation fail on the cable and the cable shorts out on the block with vibration from the engine running causing a slight hesitation/misfire normally below 3000 rpm
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Old 20-03-18, 09:17 PM   #7
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Some 2.0 HDI's have a small link harness from the fuel rail sensor which drops down behind the starter motor heat make the insulation fail on the cable and the cable shorts out on the block with vibration from the engine running causing a slight hesitation/misfire normally below 3000 rpm
ok thanks i will have a look in the daylight, is it a small cable? you say runs behind the starter motor so i should be able to see it from the front of the car? Thanks again.
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Old 20-03-18, 09:25 PM   #8
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If fitted you will see the harness it comes from the sensor on bottom of fuel rail, drops down front of block and behind end of starter motor. Only fitted to some Bosch injection models
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Old 20-03-18, 09:39 PM   #9
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Thanks i will check it out and update..
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Old 22-03-18, 11:24 AM   #10
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Quote:
Originally Posted by wazza18 View Post
Hi,
Thanks for your advice, I've got a 2.0hdi se diesel, checked the hoses and found that the breather hose from the rocker cover had come off, so i plugged it back into the air intake (where it came from) but it still hesitates on load in 3/ 4 @ 2000-3000rpm i wonder if some injector cleaner may help clean things up? The bus accelerates fine in 1st/ 2nd. I'm stumped..

Sorry for delay, I didn't get a notifaction saying you replied. I misread that it was a HDi, so forget about checking the plugs, lol.


After reading the other comments, Do you think it's engine power related, or chassis related?


If it's power related, has it all of a sudden started?
It's Rare, but it may be a bad tank of fuel.
Has the fuel filter been changed recently? As if not, might be worse a renewal and fuel injector cleaner additive. Just to make sure.
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