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n47 judder and miss
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02-12-2020, 07:32 AM | #1 |
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n47 judder and miss
Hi guys i have a 2009 318d lci n47 114k miles
was on bypass on saturday and opened throttle to give it good run as usually do short journeys, car has had chain replaced approx 8k ago got to certain speed and car hit a limiter and wouldnt go any quicker, after slowing i tried to accelerate again which caused whole car to shake and judder, i limped to a quiet side road and got recovered, since then been trying to diagnose so far Cleaned EGR Pulse tested injectors Smoothness test ISTA Swapped injectors around on ista / inpa only faults i had was EGR and a 3ffo since cleaning egr and re starting it still misses bad but only codes are 4b10 4b11 smoothness codes unplugged injectors 1 by 1 and Cylinder4 made no difference all rest did, swapped 4 with 1 but still Cylinder 4 was no difference to idle smoothness test showed 3 and 4 out of range but 4 was 5.9 im dreading a burnt or broken valve need to compression test but worried of snapping the glow plug anyone else had this issue or can help not sure if would make difference that i havent re coded injectors to new cylinders as thought would still follow the injector on rough idle. was having egr codes pop up for a bit before this but never in limp mode ect any help appreciated thanks |
02-15-2020, 11:55 AM | #4 |
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As soon as any throttle was applied the hole car just shook so I got recovered rather than trying to drive home.
I cleaned the egr after all the issues but I did try unplugging maf and no change to running but since this have also done a compression check on cylinder 4 not an accurate one but there seems to be no compression Also I did not clean inlet manifold just egr Not sure if I have burnt valve or bent valve have no timing codes so don't think chain has slipped and I'm thinking is it possible for carbon build up to dislodge and bend or chip valve or stick something open |
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02-16-2020, 03:08 AM | #8 |
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Yeah I'm gutted sold my old focus st for this as reliable family car had engine out last year June time for timing chain as preventive maintenance now this ha just need to decide weather to keep or sell once it's done and what has caused it shame as its lovely car
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02-16-2020, 07:15 AM | #9 |
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Bummer. My partner's 118d has been good as gold, though I did the chains on it too as preventative maintenance. My 330d always has problems, but nothing that holds it up (glow plugs, a few suspension bushings, etc). They're generally reliable cars, but they tend to put up a fight once you start replacing parts...
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02-17-2020, 01:22 AM | #10 | |
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02-17-2020, 01:58 AM | #11 |
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Most likely the remap, since it'll put more heat and pressure into the cylinders, but even then it seems unlucky. Who did the remap on it?
Yeah, I'm always tempted to map my 330, because 300hp. Just have to keep telling myself that I don't need it. It's not like 230 isn't enough to get from A-B. Good luck with the repairs! Maybe you could get a bore scope through a glow plug hole to see what's going on, before pulling the head etc? |
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02-17-2020, 03:21 AM | #12 | |
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My 330d was very quick after remap and alot better on mpg so to me was a no brainer had local place called midland remap do the map was very very good and strong car is still going now on 180 plus miles |
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