gregg
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Every day is a school day.
Posts: 72 
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Post by gregg on Feb 22, 2019 23:02:31 GMT 1
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 22, 2019 23:03:21 GMT 1
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 22, 2019 23:04:13 GMT 1
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 22, 2019 23:05:07 GMT 1
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 22, 2019 23:17:43 GMT 1
Attachment DeletedAttachment DeletedEvening all. I couldn't find my boost gauge to measure the pressure today. In between times i got talking to a mate who works in an audi dealership and he pointed me to check this egr valve which bolts on to a separate pipe which breaks away from main dpf. This valve is situated below the turbo so safe to say i have done a fair bit of screwing today lol. There is a rubber pipe about 50mm in diameter and 80mm long which apparently can split and cause the problem i am having. This pipe goes from this egr valve up to the plastic diverter pipe bolted to the intake side of the turbo. Having removed all this i can confirm that turbo is spinning freely and has no stickiness to it as well as the vanes being free and actuator moving. As you can see from the pics there is a fair amount of crap in the dpf as well as on the butterfly on the egr valve. i cleaned some of it off before i took the pics. I can see around half the holes in the dpf clear with other half being clogged up. the butterfly on egr valve does move and closes over again automatically but i am not sure what the electrical side is like. If anybody would have any test info or resistance readings i should be getting across terminals it would be very appreciated. Only now have i learned this engine has two egr valves. i ran an actuator test yesterday through vagcom and exhaust flap cycled through test and passed. Each time i tried an egr test it failed so i'm hoping now this valve is the cause of my problems. Also only after reaching the 3/4 mark for stripping this down today have i learned that the bulkhead panel behind engine can be removed to give a bit more access.
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Deleted
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Post by Deleted on Feb 24, 2019 11:29:59 GMT 1
Any update on your progress gregg. The turbo impellor port looks quite oiled up to me  actually a lot worse than the SAAB I'm working on and that turbo is seized. I see you are working on the B8 model, if there is anything specific you might require let me know I can now look into my archives and see what I have for the B8 model! |
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 24, 2019 12:45:18 GMT 1
Any update on your progress gregg. The turbo impellor port looks quite oiled up to me actually a lot worse than the SAAB I'm working on and that turbo is seized. I see you are working on the B8 model, if there is anything specific you might require let me know I can now look into my archives and see what I have for the B8 model! Yeah the output port is a bit oily but the intake port is clean as a whistle. Have a new egr valve coming tomorrow for it. Motor factors only list the valve at the inlet manifold, they dont mention this one low down on the exchanger till i gave the part number for it. Thanks for the offer guardian, would you have any readings or values for testing the small egr valve? I.e any resistence readings.between terminals? I did notice.on vagcom under the readiness test column that egr system flagged up.in red as failed or.incomplete so.wondering and hoping this valve has been causing it. Fuel system and completeness test all were.in green and saying passed. |
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Deleted
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Post by Deleted on Feb 24, 2019 22:19:34 GMT 1
Any update on your progress gregg . The turbo impellor port looks quite oiled up to me actually a lot worse than the SAAB I'm working on and that turbo is seized. I see you are working on the B8 model, if there is anything specific you might require let me know I can now look into my archives and see what I have for the B8 model! Yeah the output port is a bit oily but the intake port is clean as a whistle. Have a new egr valve coming tomorrow for it. Motor factors only list the valve at the inlet manifold, they dont mention this one low down on the exchanger till i gave the part number for it. Thanks for the offer guardian, would you have any readings or values for testing the small egr valve? I.e any resistence readings.between terminals? I did notice.on vagcom under the readiness test column that egr system flagged up.in red as failed or.incomplete so.wondering and hoping this valve has been causing it. Fuel system and completeness test all were.in green and saying passed. I'll have a search through my archives tomorrow evening when I get a minute and see what is there. In my opinion resistance readings for test purposes are not very reliable, you'd be much better using either VCDS or a good scanner component test function to check the correct operation of the EGR. |
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 25, 2019 7:49:34 GMT 1
Yeah the output port is a bit oily but the intake port is clean as a whistle. Have a new egr valve coming tomorrow for it. Motor factors only list the valve at the inlet manifold, they dont mention this one low down on the exchanger till i gave the part number for it. Thanks for the offer guardian, would you have any readings or values for testing the small egr valve? I.e any resistence readings.between terminals? I did notice.on vagcom under the readiness test column that egr system flagged up.in red as failed or.incomplete so.wondering and hoping this valve has been causing it. Fuel system and completeness test all were.in green and saying passed. I'll have a search through my archives tomorrow evening when I get a minute and see what is there. In my opinion resistance readings for test purposes are not very reliable, you'd be much better using either VCDS or a good scanner component test function to check the correct operation of the EGR. Many thanks, appreciate that. I did try a function test for the egr valve with vcds but it kept flagging up error not possible or error condition not met. So hopefully this one is the problem. |
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Deleted
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Post by Deleted on Feb 25, 2019 21:41:36 GMT 1
I'll have a search through my archives tomorrow evening when I get a minute and see what is there. In my opinion resistance readings for test purposes are not very reliable, you'd be much better using either VCDS or a good scanner component test function to check the correct operation of the EGR. Many thanks, appreciate that. I did try a function test for the egr valve with vcds but it kept flagging up error not possible or error condition not met. So hopefully this one is the problem. I'm sorry something is wrong with my Audi disc, it has about 4MB on it but won't open! Anyway, do some sole searching here; www.vaglinks.com/vaglinks_com/docs/ssp/You'll be somewhat a bit of an expert when you have finished that lot LOL  |
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 26, 2019 22:01:09 GMT 1
Many thanks, appreciate that. I did try a function test for the egr valve with vcds but it kept flagging up error not possible or error condition not met. So hopefully this one is the problem. I'm sorry something is wrong with my Audi disc, it has about 4MB on it but won't open! Anyway, do some sole searching here; www.vaglinks.com/vaglinks_com/docs/ssp/You'll be somewhat a bit of an expert when you have finished that lot LOL Hiya guardian, Many thanks. A bit of reading there lol. Just an update now, got a new egr valve fitted, just waiting on a new coolant pipe coming now so i can get cooling system filled up and see how i get on. The plastic return pipe from the head and egr exchanger broke when i was dismantling to get to the egr valve. Retaining clip at metal pipe was brittle and broke on removal. |
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Deleted
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Post by Deleted on Feb 27, 2019 10:54:44 GMT 1
Let's see how it goes with the final bits in place  |
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Feb 27, 2019 22:41:23 GMT 1
Evening chaps, just an update now. Got pipe in today an cooling system bled up. Cleared all codes and went a test drive. Done 30 miles with no issues or lights on. Plenty of power an torque. Checked for dtc's after this and had one for maf implausible signal and particle filter trap bank 1 again. All cleared again. Wife took car home with no problems. Jumped in tonight to go a message and glow plug light is back on again and back to square one with reduced power. All 7 dtc's are back
2x boost limit not reached
Maf implausible signal
Egr insufficient flow
Particle filter trap bank 1
Intake air leak
Cyl 3 pressure sensor.
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Deleted
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Post by Deleted on Feb 27, 2019 23:51:00 GMT 1
Time well spent reading the SSP links will be good value now I think.
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gregg
New Member
Every day is a school day.
Posts: 72
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Post by gregg on Apr 26, 2019 22:41:06 GMT 1
Heya folks, sorry for delay on an update. A friend of mineas who works in our local vw dealership offered to have a look at the a4. After a few days with it he reckoned the fault was in the vanes in turbo or the ecu. We removed both the dpf and turbo. The turbo didnt have any excessive carbon build up. I sent the dpf to a company that cleans them. Upon inspection and testing the dpf there flow readings suggested it was 75% blocked. They cleaned it out and the readings were a lot better. Once we refitted all and drove the car it seemed a lot livlier and it done a regen on itself 2 days after being built up. All was good till tonight and the dreaded light is back on. Only showing 1 code now which is P0237, manifold pressure/ boost sensor. Signal too low.
So back to the drawing board again lol.
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actually a lot worse than the SAAB I'm working on and that turbo is seized. I see you are working on the B8 model, if there is anything specific you might require let me know I can now look into my archives and see what I have for the B8 model!
