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Old 09-13-2021, 03:55 PM   #1
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Default 89 vg30i wont start

Good afternoon everyone. Dumb new guy questions so please bear with me. I picked up a 89 D21 with the 3.0 v6 from a guy who im pretty sure did more damage than good. When he got it, it needed a timing belt so he took the heads to be redone, did a new timing kit, plugs, wires, cap/rotor among other things. I got the FSM from nico club and have been going through everything step by step. I have the timing belt all set correctly but am still having an issue with it not starting. If you put gas in the tbi, it starts and runs great up until that gas runs out. While having someone else start it and looking in there, it doesnt appear that the injectors are putting any fuel into the system. I checked the pressure at the inlet, and when you turn the key on I get about 38 ish PSI. so I believe that the fuel pump is good. I ohm'd the injectors and they are showing around 1.3-1.5 ohms. Im sure none of the vacuum lines are correct and I am trying to sort those out, but it should at least start I would assume. Im new to the nissan world so its been a sharp learning curve. Does anyone have any ideas what I should check next? Im planning on doing the FSM diagnostic procedures, but figured if anyone had some other ideas I could do them as well. I know he worked on it quite a bit as the injector wires were cut/spliced together, and it came with a whole extra tbi set up.

Thank you for your time!
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Old 09-13-2021, 04:48 PM   #2
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Pull codes first. Could just be damaged wires to the injectors, a bad sensor, etc. I'm not sure what rail pressure should be. 38 seems low but I could be wrong.



If t you have enough pressure at the fuel rail it'll be injectors. If you look down the throttle body is the butterfly wet at all when you try to stay it without dumping fuel down it?
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Old 09-13-2021, 04:59 PM   #3
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Yeah I'm with DH thinking you've probably got bad injectors. Unfortunately they're pretty hard to find.
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Old 09-13-2021, 08:12 PM   #4
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JY time if the injectors are failing.
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Old 09-14-2021, 01:39 AM   #5
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Nope. You blew the fusible links.

The injectors get their power from the fusible links.

http://www.infamousnissan.com/forum/showthread.php?t=35558
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Old 09-14-2021, 03:34 PM   #6
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Thank you all for the help! I will check the power to the injectors first and go from there. from what I'm reading in the FSM is fuel pressure should be around 36.3 so I'm thinking I'm ok there. Ill probably order up some fusible links just have have either way. I was just looking and was wondering where the best place to get those fusible links is?

Another question, does anyone have any sort of vacuum diagram, or pictures? Trying to decipher the FSM on that isn't working out too well.

Also, when I check the codes all I'm getting is 55


Thanks again!

Last edited by FP3; 09-14-2021 at 03:42 PM.
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Old 09-14-2021, 03:49 PM   #7
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There is this for the Z24:



I know yours is the VG30i, but that Z24 image was edited from this diagram:



This is the equivalent vacuum diagram for the VG30i:



Nobody has made a colored version for it yet, though.
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Old 09-14-2021, 03:51 PM   #8
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That's perfect! thank you very much. I just called a local nissan dealer and they said those fusible links aren't sold anymore. or at least that they cannot get them. Guess ill have to start searching.
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Old 09-14-2021, 04:15 PM   #9
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Try an eBay search. Sometimes people with old stock list them there.

Start by searching by part number. If nothing, then try searching by name, but looking for "fusible links" will probably pull up thousands.

If you search Google using the part number, you will find lots of hits, but most sites are going to say that they are discontinued. You might luck out and find a site that still has some.

If you have a multimeter, you can check the continuity of the wires. If they are not burned out, you don't need to replace them.

Some people have bought fusible link wire and spliced them into the truck. I think the wire color is supposed to denote how much current can go through them before they burn up, but I cannot say for sure if Nissan followed that convention back then before OBD2.

Good luck!
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Old 09-14-2021, 04:25 PM   #10
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I appreciate it! Yea, most places I find say discontinued. Found one on ebay that looks correct possibly. I'm going to check mine out when i get home friday evening. Sucks working out of state and needing to work on something at home! haha

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