R1 cylinder flooding

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autonova	R1 cylinder flooding		Lead	[-]
Registered User Posts: 4 06/02/08 08:29:12	Tags : None Hi Guys I am having an unusual problem with an '06 R1 engine. Number 3 cylinder is overfueling. The engine usually idles and runs well but occasionally at idle it will drop number 3 cylinder and raw fuel runs out of the exhaust. On the track the car bogs down on the exit of 2nd gear corners. It is intermittant but when it does occur if I check the throttle bodies, number 3 cylinder is wet. I have changed plugs, coils and injectors but it is still happening. I don't know if it is an injector staying open or the coil not firing. It is a stock ECU and is showing no fault codes. Anyone had this before? Cheers Greg
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Brownslane.diasio	Are you "fueling me?"	#1	[url]	[-]
Registered User Posts: 19 06/02/08 09:32:48	Greg, sounds like a leaking injector. Hanging open at idle, not tricking the ECU, and will tend to burn off over fueling at higher revs. Tom in Toronto
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Brownslane.diasio		#2	[url]	[-]
Registered User Posts: 20 06/02/08 09:57:21	Greg, I still think that the issue is fuel...not ignition. the fact that you have changed out injectors makes this a little more challenging. Not sure, but check the harness for any chance of cross-firing of injectors... I've seen that in our 12 cyl engines.... The fact you have no mis-firing is contra to most ignition problems... Also check the throttle body and air intake for any chance that cylinder's air intake is restricted in some way....that would cause the bog and rich running. Tom in Toronto
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George Dean		#3	[url]	[-]
Registered User Posts: 191 06/02/08 12:43:47	Does it have a Powercommander? George
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autonova		#4	[url]	[-]
Registered User Posts: 5 06/02/08 21:16:39	Hi All Thanks for your comments. The car does not have a powercommander and is running a stock ECU (road bike version) and loom. I initially thought being only one cylinder that it was a leaking injector or a coil or plug not firing so I changed all of those for complete new sets and even the loom to the coils. The throttle bodies and intake are quite clear as it only runs a foam filter. The engine has been running very well for over 12 months so this is a new thing. I think your right Tom in that it is fuel and not spark as it does eventually clear at higher revs. A friend suggested the injector loom/ECU may be shorting to earth somewhere and holding the injector wide open. This seems logical because so much fuel runs out of the headers at idle. If you turn it off and start it again it clears and revs cleanly so it is quite hard to find. I don't like my chances of finding this as it is intermittant. I will probably have to change the loom and ECU. Any other suggestions are more than welcome. Thanks Greg
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ted arken		#5	[url]	[-]
Registered User Posts: 2673 06/03/08 18:43:44	Greg, are you able to see if the ecu has any fault codes set? This may help determine that at least the ecu knows something is not right. Check all your wiring, especially wires that go through sheet metal openings, or have a chance to get pinched and possibly wear through the insulation and short to ground. If the problem persists after checking the wires themselves, look at the wiring junctions in the loom. These junctions look like small blocks that are wrapped in tape. Sometimes if exposed to moisture the internal crimps can rust, preventing a good connection. And check your grounds. Last Edited By: ted arken 06/03/08 18:46:23. Edited 1 time.
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autonova		#6	[url]	[-]
Registered User Posts: 6 07/09/08 23:00:21	Hello all Sorry for the delayed reply but I only got a chance to try the car out on the track yesterday. I checked out the loom as best I could and couldn't see anything obvious, there were no fault codes from the ECU and all of the diagnostic functions appeared ok. I ended up swapping out the ECU and the problem has been resolved. A friend suggested I sniff the ECU to see if it had a burnt smell, which it did, he said it probably has a blown injector controller module internally. The other ECU which is second hand had no smell to it. Anyway the car ran well yesterday so I am much happier now. Thank you to everyone for your suggestions and I hope this thread may help someone else in the future. Cheers Greg
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Brownslane.diasio	Whaat's that smell..??	#7	[url]	[-]
Registered User Posts: 27 07/11/08 15:43:16	See, I KNEW IT!!! The magic of these ECU's is SMELL......once it escapes, the ECU doesn't work anymore..hehehe In my British cars (Lucas electrics)..the magic is hidden inside the smoke....... Lucas - Father of the intermittent wiper Lucas Light switch positions - Dim, Flicker, Off Warm Beer = Lucas refrigerator And my favourite bumper sticker: "All the parts falling off this car are of the Finest British Manufacture" hehe
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ted arken		#8	[url]	[-]
Registered User Posts: 2702 07/18/08 18:32:31	What you're smelling is the escaping electrons. Once they find an escape route its all over for that particular component. Lotus = Lots Of Trouble, Usually Serious
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