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displaying posts 1 to 17 of 17
| Author | Subject: Missfire at 4k |
 fatlapit
Seasoned Pro  Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #1
So i have a strange miss fire at 4k.Regardless of temp Regardless of load/gear Regardless of speed Regardless of boost level Ive tried a new coil unit made no difference Tried a new map sensor made no difference Tried new plugs no difference Tried a tps no difference So any ideas?? ________________________________________ |
 Posted 2nd Jul 2017 at 19:07
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #2
Oh fpr is fpot on too________________________________________ |
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Posted 2nd Jul 2017 at 19:07
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #3
On omex 600 too________________________________________ |
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Posted 2nd Jul 2017 at 19:08
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adam b
Seasoned Pro  Location: The Nam Registered: 24 Jan 2006 Posts: 12,828 Status: Offline |
Post #4
Is the lambda giving the right readings?Does it go away higher up the revs? ________________________________________ Nothing to see here |
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Posted 2nd Jul 2017 at 20:21
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #5
Literally only 4k. Clean before and clean after. The plugs look great and we couldnt fix it on the dyno either. Its like it just cba at 4k ________________________________________ |
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Posted 2nd Jul 2017 at 20:43
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #6
Also it revs freely when in neutral________________________________________ |
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Posted 2nd Jul 2017 at 21:00
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miki4
Regular  Location: Cologne Registered: 09 Nov 2015 Posts: 390 Status: Offline |
Post #7
Is it also missing while accelerating full chat and passing 4K or only when holding it at 4K? Does it miss on part throttle while passing 4K? |
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Posted 2nd Jul 2017 at 21:59
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #8
Misses at 4k whilst driving at any throttle position but is perfectly clear before and after and will rev freely in neutral________________________________________ |
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Posted 2nd Jul 2017 at 22:20
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miki4
Regular Location: Cologne Registered: 09 Nov 2015 Posts: 390 Status: Offline |
Post #9
A dodgy crank or cam position sensor that gives false readings at around 4k would be plausible. Also check the loom and plugs of those sensors. Could be that right at that revs some interference occurs in the signal path. Can you read live sensor data? Has the fault developed or has it always been there in this config? |
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Posted 2nd Jul 2017 at 23:19
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #10
developed about a month ago, thought we may of sorted it on the dyno but to no avail________________________________________ |
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Posted 3rd Jul 2017 at 07:55
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,838 Status: Offline |
Post #11
can you get a capture of the datalog the ecu is seeing when it happens?do you run a knock sensor? ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 3rd Jul 2017 at 11:00
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #12
No nock sensor Ill plug my laptop in and see but when it was on the dyno it pointed at a coil issue. However ive swapped the coil for a new one which made it worse. The plugs are new and have been gapped ________________________________________ |
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Posted 3rd Jul 2017 at 11:37
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,838 Status: Offline |
Post #13
what coil do you use? reputable brand?________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 3rd Jul 2017 at 12:24
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #14
yeah man its a s16 coil dude________________________________________ |
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Posted 3rd Jul 2017 at 12:34
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #15
I will try a new coil________________________________________ |
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Posted 3rd Jul 2017 at 12:34
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,838 Status: Offline |
Post #16
ohhh I see, yeah they were buggers for misfires even if they looked fine, have you trimmed the cam cover back to allow the heat to escape? or is it modified onto a gti6 head?________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 3rd Jul 2017 at 12:44
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fatlapit
Seasoned Pro Location: STOCKSFIELD Registered: 02 Nov 2010 Posts: 3,040 Status: Offline |
Post #17
gti6 head has been modded to accept the coil________________________________________ |
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Posted 3rd Jul 2017 at 13:01
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