Subject	Re: Fuel in oil
Posted by	Zxpress on January 29, 2023 at 4:49 PM
	This message has been viewed 142 times.
In Reply To	Fuel in oil posted by Agent X on January 26, 2023 at 12:59 PM
Message	To your question. It is possible while the car is running that a fuel injector is not closing as fast as it should. There is a good youtube video on Pine Hollow Diagnostics channel where he uses an oscilloscope to find a bad injector. But in the video, the problem is a misfire code. I guess a pinched O-ring could also cause your issue. There shouldn't be residual voltage on the injector. That is powered by key on/key off for the positive side and the ECU pulsates a ground to open the injector. If you had constant ground to the injector, it would foul the plug. You'd definitely know a cylinder was down.
Follow Ups	Fuel in oil - Agent X 12:59:54 01/26/23 additional info - Agent X 15:07:38 01/26/23 Fuel pressure regulator bad sucking raw fuel possibly. - mrchips 07:45:02 01/27/23 It was replaced due to age, but no sign of leak - Agent X 08:40:52 01/27/23 Carbon Canister Vac Line? (n/m) - Cjw3 18:48:12 01/26/23 Wouldn't that cause a lean condition? - Agent X 20:36:22 01/26/23 A flooded Carbon Canister will be rich - Cjw3 10:55:52 01/27/23 CC was deleted years ago, but that would make sense (n/m) - Agent X 11:00:49 01/27/23 It sure sounds like... - Denis 19:34:10 01/27/23 I'm afraid it could be the tune, and I can't check it - Agent X 20:23:49 01/27/23 Shoot Seb at SZ an email and see if he has suggestions - Denis 16:34:18 01/28/23 Got response- went to spam folder - Agent X 08:47:46 02/06/23 If your tuner did not account for the 740's properly then - Denis 11:40:57 02/09/23 He supposedly did a tune on his dyno (attached) - Agent X 12:12:01 02/09/23 Others on this site are more experienced in tracking AFR - Denis 12:55:18 02/10/23 If you are at the point you want to try another program - Denis 16:27:39 02/10/23 Re: Fuel in oil - Zxpress 16:49:19 01/29/23 Did an injector pulse test to roughly measure flow - Agent X 14:19:49 02/02/23 What injectors did you install? - Doug71zt(CAN) 09:38:27 01/30/23 Nismo 740cc (new) - Agent X 10:06:59 01/30/23
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