Subject	Updates: Tried a few more things today.
Posted by	Woody75 (Denver) on October 30, 2021 at 11:47 AM
	This message has been viewed 251 times.
In Reply To	Need help with low rpm engine stumble issue. posted by Woody75 (Denver) on October 26, 2021 at 06:06 PM
Message	Took out the passenger side PCV. Although the hose was shot, the valve itself was very clean and is working. Not stuck open or anything. Change FPC out, no change. Tested EGR, working and not an issue Change out coolant temp sensor, no change. At this point I'm going to have the car back to the owner and move along. Anymore troubleshooting is going to require really digging into the engine firther than I can right now. I've had it way longer than I planned and it's not even supposed to be here right now. I have other peoples projects to work on that have been waiting. >
Follow Ups	Need help with low rpm engine stumble issue. - Woody75 (Denver) 18:06:17 10/26/21 Re: Need help with low rpm engine stumble issue. - Metacom 19:42:01 10/26/21 Also... - Metacom 19:54:47 10/26/21 Aftermarket vacuum gauge in the car reads where it should. - Woody75 (Denver) 22:28:48 10/26/21 Re: Aftermarket vacuum gauge in the car reads where it should. - Metacom 22:56:28 10/26/21 Ok, thats pretty much what we have then. - Woody75 (Denver) 08:27:18 10/27/21 Re: Ok, thats pretty much what we have then. - Metacom 14:23:56 10/27/21 Vacuum test details here that Metacom refers to>>>>>>>> - ZUL8TR 04:36:34 10/27/21 ECU was swapped out. - Woody75 (Denver) 22:27:20 10/26/21 Re: ECU was swapped out. - Metacom 14:22:08 10/27/21 Power balance test. - Woody75 (Denver) 14:51:14 10/27/21 Replace the VTC gears & solenoids, redo timing. - Bernie (NoVA) 00:44:03 10/27/21 VTC gears tested good. - Woody75 (Denver) 11:01:56 10/28/21 Re: VTC gears tested good. - Metacom 13:59:01 10/28/21 Re: Re: VTC gears tested good. - Metacom 14:06:24 10/28/21 Wiring harness. - scorp997 15:33:23 10/28/21 I tested the harness from the ECU to each injector. - Woody75 (Denver) 15:55:38 10/28/21 Possibly fuel pump controller low or mid speed not - LitlElvis 11:54:18 10/27/21 Wouldnt that show in the fuel pressure readings? (n/m) - Woody75 (Denver) 14:40:46 10/27/21 Probably - wasn't sure if you were monitoring fuel pressure - LitlElvis 13:43:27 10/28/21 I said this too but Woody didn't believe me. (n/m) - Bernie (NoVA) 00:20:35 10/28/21 Neither did Mike :) (n/m) - Woody75 (Denver) 09:47:01 10/28/21 Update: Put in different FPC, no change. (n/m) - Woody75 (Denver) 11:39:36 10/30/21 Check out this post from a Z31 owner, similar symptoms - Polishzx 00:09:53 10/28/21 After thinking over this for awhile I'm going to toss - Ghoztt (MD) 15:23:24 10/28/21 Does the car have an EGR valve? (n/m) - mrchips 07:23:38 10/30/21 Actually I just played with that this morning. - Woody75 (Denver) 11:41:27 10/30/21 Updates: Tried a few more things today. - Woody75 (Denver) 11:47:22 10/30/21 Did smoke test include the engine. Intake leak check. - mrchips 06:38:07 10/31/21 Yes, smoke test from the intake tube. - Woody75 (Denver) 11:03:11 10/31/21 Your symptoms sound similar to what I've been - black300zx 16:59:12 11/06/21 Another update: - Woody75 (Denver) 09:27:47 11/08/21 Brutal... Could you try testing fuel pressure in some other - Polishzx 02:05:39 11/09/21
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