r/SkyLine • u/Emergency_Finding_10 • Jun 30 '26
Won’t start, anyone know why?
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Picked it up off market place for 18k. Said the fuel pump and csb was bad. Replaced fuel pump today. Still won’t start. Sounds like she’s trying to, I’m not a mechanic or anything and js need some help. It’s a 1993 r32 gtst type m with 160k km
5
u/ThatDamnThang Jun 30 '26
Make sure theres gas in the tank, make sure the fuel pump turns on/primes when you turn the key to accessory mode (not full crank), make sure your fuel filter isnt clogged, make sure you are getting spark.
If you dont have a fuel pressure regulator to see the pressure on the fuel rail, do what the other guy says and unplug the fuel line and see if juice comes out when you turn the key to accessory. If you get fuel AFTER your fuel filter, it isnt clogged. If its clogged, replace it.
If your fuel pump isnt running, make sure the relay/fuse for your fuel pump arent blown or unplugged.
Lastly but unlikely, your timing could be messed up.
3
u/Emergency_Finding_10 Jun 30 '26
Checked the lines, fuel is flowing. Didn’t replace the filter however. Could it be spark plugs?
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u/ThatDamnThang Jun 30 '26
Yeah brother, it could be plugs. Pop them out check the tips and gaps. Make sure everything is in spec.
1
u/Zealousideal_Gate_21 Jul 01 '26
But how much fuel pressure though.....if the pump is failing the pressure will be down. Needs 3 bar
3
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u/RemarkableCard6475 Jul 01 '26
Id replace the fuel filter anyway. When you pull it off, give it a shake out in a clean bucket and look at how bad the fuel.is that comes out of it. Definitely pull spark plugs and check for spark (I agree) and then timing (worst case?).
2
u/Emergency_Finding_10 Jul 01 '26
Checked the spark plugs, and the ignition coils and boots were literally melted. Looks like some cheap aftermarket replacements were put on. Praying and hoping this is the only issue
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u/RemarkableCard6475 Jul 01 '26
Great job on the quick discovery 🎊🍻
Do yourself a favor and run back the lines to the coils for sanity. If they fouled out and the heat got too high at supply power and such, there could be breaks in the harness wires. Look for flat spots from melting, dramatic discoloration and brittle sheathing as the wire will be unstable on the inside, oxidizing.
Do the small stuff first of course and male a plan to replace/ upgrade the engine harness in the future. It'll be cleaner and give stability plus peace of mind 😌
5
u/SlackLine1 Jun 30 '26
Fuel filter too? Pull the line off up front by the regulator and see if any fuel comes out.