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displaying posts 1 to 18 of 18
| Author | Subject: Running very rich, any ideas? |
 306harv
Newbie  Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #1
Hi,I have a recently purchased a track 306 with a S16 engine and apparently a MI16 inlet manifold, and after have an issue with it running very rich with a lack of power low down in the rev range. I have replaced the Lambda sensor, which appeared to fix it at first??? but literally 50 miles or so and its the same again. Any help or ideas would be most appreciated?? Thanks |
 Posted 1st May 2011 at 00:15
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adam b
Seasoned Pro  Location: The Nam Registered: 24 Jan 2006 Posts: 12,828 Status: Offline |
Post #2
Does it have a map sensor or air mass sensor? Water temp is a good one too and cheap to change. Check all the wiring to the sensor plugs and that the pins are all ok.Anything daft like an adjustable fuel regulator or 'chip' in the ecu? The lambda new and correct part? What management is it using? S16 or Mi16? Just the S16 uses an adjustable length inlet manifold so that will change the afr over the rev range compared to the Mi16 inlet. ________________________________________ Nothing to see here |
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Posted 1st May 2011 at 01:02
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #3
ECU pic attached306harv has attached the following image: |
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Posted 1st May 2011 at 22:41
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #4
Replaced Green coolant temp sonsor today and still gutless under 4k rpm and smells richWhat next? |
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Posted 1st May 2011 at 22:46
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #5
Rolling raod result from yeaterday |
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Posted 1st May 2011 at 23:02
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #6
Engine pics, looks like the MAP is discunnected if I am looking at the right thing     |
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Posted 1st May 2011 at 23:03
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adam b
Seasoned Pro Location: The Nam Registered: 24 Jan 2006 Posts: 12,828 Status: Offline |
Post #7
Yes MAP sensor is disconnected and thats a GTi6 manifold, not Mi16. I'd PM 'welshpug!' and ask him to look at it. Will have a better idea than me. ________________________________________ Nothing to see here |
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Posted 2nd May 2011 at 00:09
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #8
Thats show what I know about it! lolHave PM him - thanks! |
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Posted 2nd May 2011 at 00:35
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dan_s16
Seasoned Pro  Location: Cheltenham Registered: 22 Jan 2005 Posts: 1,583 Status: Offline |
Post #9
The Map sensor on the S16 is built into the ecu, there should be a vacuum pipe from the inlet manifold connected to the brass pipe coming out of the top of the ecu.The reason it's flat until 4.5krpm is because you no longer have the variable inlet manifold on it. Not sure if there is a way to help fix that with out swapping the inlet back Mines doing the running crazy rich thing at the moment, i've tried changing every sensor apart from the map sensor (can't seem to get a replacement from Bosch either  ) and the throttle position sensor (next on my list)________________________________________ When I've got time I forget what I wanted to do, and when I remember what I wanted to do, I have no time! |
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Posted 2nd May 2011 at 00:37
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #10
Why do you reckon someone fitted this manifold onto the S16 engine? |
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Posted 2nd May 2011 at 00:38
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dan_s16
Seasoned Pro Location: Cheltenham Registered: 22 Jan 2005 Posts: 1,583 Status: Offline |
Post #11
Possibly because some people see the S16 manifold as complicated (it's not really) and unreliable so they take it off thinking it'll make it better but it doesn't always work.Looking at the pics the vacuum feed to the map sensor is teed from the fuel pressure regulator vacuum feed, that may be adding to the problem ________________________________________ When I've got time I forget what I wanted to do, and when I remember what I wanted to do, I have no time! |
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Posted 2nd May 2011 at 00:42
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #12
How could I plumb it in better to hopefully improve it if this isn't helping? |
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Posted 2nd May 2011 at 00:48
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dan_s16
Seasoned Pro Location: Cheltenham Registered: 22 Jan 2005 Posts: 1,583 Status: Offline |
Post #13
Not sure on that one, as far as I know the GTi manifold only has one vacuum port. It may not be causing the problem but thought i'd mention it in case we can't find what else is causing it to over fuel.________________________________________ When I've got time I forget what I wanted to do, and when I remember what I wanted to do, I have no time! |
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Posted 2nd May 2011 at 00:55
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welshpug!
Capt Pedantic  Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #14
running the vacuum as shown shouldnt cause any issues, its how I built up an RFY (2.0 MI16/S16/ZX 16v) in a 205 a few years ago for someone, do make sure the pipe is still connected to the ecu properly though.Check that the TPS is connected and working, doesnt matter if its the RFS ir RFY tps as they both work the same IIRC. I see the Idle valve is conencted fine, idle speed ok? Which injectors does it have? Should be Bosch yellows on this engine+ecu combination, NOT the Green RFS items. ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 2nd May 2011 at 15:13
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306harv
Newbie Location: Birmingham Registered: 30 Apr 2011 Posts: 9 Status: Offline |
Post #15
Vacuum pipe is connected to the ECU okTPS is connected ok, how can I check its working correctly? Idles fine Will check and let you know about the injectors PS - thanks for your help guys so far!!! |
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Posted 2nd May 2011 at 21:58
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rikky
🦔 Location: cheshire Registered: 28 Feb 2004 Posts: 26,793 Status: Offline |
Post #16
same setup on my other 306, it also feels a bit flat below 4k but not *that* bad, goes like stink though other than that________________________________________ 306 rallye reproduction decals (full sets/individual decals) | 306 b-pillar textured vinyl weatherstrips306 slam panel esso stickers | 306 yellow / orange / pension fund red side door badges gti6 inlet manifold badges | 306 rear boot badges (p2/p3) winner of Extraction of toys from prams with outstanding vigour award 2009 [source: gti6 owners club] |
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Posted 3rd May 2011 at 16:33
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welshpug!
Capt Pedantic Location: Bigend, Wales. Registered: 27 Mar 2007 Posts: 25,817 Status: Offline |
Post #17
they often "feel" a bit flat below 4-4.5k, but only because they go nuts above there  ________________________________________ need a part number? get on here - http://public.servicebox.peugeot.comBring on the Trumpets. |
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Posted 3rd May 2011 at 17:47
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dan_s16
Seasoned Pro Location: Cheltenham Registered: 22 Jan 2005 Posts: 1,583 Status: Offline |
Post #18
I've almost forgotten what mine feels like to drive, it's been SORN for nearly a year now ________________________________________ When I've got time I forget what I wanted to do, and when I remember what I wanted to do, I have no time! |
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Posted 3rd May 2011 at 17:52
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