Subject	Could be PTU?
Posted by	Auggie on May 30, 2015 at 1:23 PM
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In Reply To	Car won't start after replacing injectors posted by Auggie on May 29, 2015 at 02:15 PM
Message	Found a site that shows troubleshooting steps for non-firing spark plugs: http://www.300zxclub.com/showthread.php?p=1965559#post1965559 (registration required to view link) Got to the PTU testing, and if I followed the diagram accurately: Conditions fail for terminal 1 (labeled "E1" on PTU) positive and terminal 2 (labeled "E2" on PTU) negative (did not get infinite resistance), and for terminal 3 negative and terminal 1 positive (did not get infinite resistance). Since this sucker is almost $200 shipped, did I test the PTU correctly as specified in the image above?
Follow Ups	Car won't start after replacing injectors - Auggie 14:15:17 05/29/15 Won't crank, or cranks but won't fire up? (n/m) - FrozTTy 15:24:44 05/29/15 Re: Won't crank, or cranks but won't fire up? - Auggie 15:30:18 05/29/15 You could always check each plug individually. Remove the - YlwPrlZTT 16:08:12 05/29/15 Will do that with the coils! - Auggie 17:23:01 05/29/15 you don't have to mess with the fuel line to get the balance - YlwPrlZTT 19:57:01 05/29/15 Make sure fuel lines aren't crossed... - ttz'in (norcal) 20:13:03 05/29/15 Matched photos with other cars - Auggie 08:05:39 05/30/15 No Spark - Auggie 10:16:11 05/30/15 Also, ~1.2-1.5 Ohms - Auggie 10:48:24 05/30/15 Actually, twas 0.9 Ohms - Auggie 12:43:49 05/30/15 And Ignition Coil Relay good - Auggie 11:13:32 05/30/15 Could be PTU? - Auggie 13:23:37 05/30/15 Do you still have the PTU subharness installed? - YlwPrlZTT 14:06:01 05/30/15 Yes, but harness very pliable relative to all else - Auggie 14:17:27 05/30/15 Ok, I would still delete that subharness to be sure. It's - YlwPrlZTT 14:39:11 05/30/15 I agree with all - Auggie 14:47:06 05/30/15 Check all the PTU connections that it calls for. - YlwPrlZTT 15:04:04 05/30/15 I actually just deleted my subharness as well, once I get - YlwPrlZTT 15:05:47 05/30/15 With an older EFI harness, and in the PTU area - ttz'in (norcal) 15:15:32 05/30/15 Don't think it's PTU - Auggie 15:48:14 05/30/15 Re: Car won't start after replacing injectors - Placuch 16:03:46 05/30/15 Re: Re: Car won't start after replacing injectors (n/m) - Auggie 16:22:53 05/30/15 My GAWD - Auggie 16:27:06 05/30/15 fixed! connector corrision with sub-harness! - Auggie 17:08:51 05/30/15 Glad you got it running again. That sub-harness is nothing - YlwPrlZTT 17:16:41 05/30/15 Agree with sub-harness PITA! - Auggie 17:44:57 05/30/15 I would avoid Wiring Specialties - flashstar 13:50:48 05/31/15 ^ Agree ^ Well done ! (n/m) - ttz'in (norcal) 14:50:11 05/31/15
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