efp0wa Posted July 28, 2011 Share Posted July 28, 2011 Hi All, My old mans Laurel (C34 with RB20E) isn't starting. I havn't checked for spark yet as didn't have my tools with me yesterday, Check all fuses and appear ok. I can't quite recall if its possible to hear the fuel pumps in these laurels prime for a few seconds before startup, but I can't hear a thing so I was thinking it may be the pump or relay (if there is a fuel pump relay). I will check for spark after work, but if its got spark where should I look after that? Quote Link to comment Share on other sites More sharing options...
Hemi Posted July 29, 2011 Share Posted July 29, 2011 hold fuel line while someone hits the key to on should prime for about 7 seconds without a signal from cam. they wont start if the cam sensor decides to fall of/ shit itself. that is easily checked by looking for spark . and yes they should have fuel pump relay triggered by ecu . did it 'just stop working' or was this after touching somthing? Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Nothing had been messed with, apaprently was low on gas. I know where the cam sensor on a de is but not on a e. I'll check for spark in half hour and update. Quote Link to comment Share on other sites More sharing options...
kyteler Posted July 31, 2011 Share Posted July 31, 2011 I would start with the fuel if I was you. Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Ok, I will go over the fuses the again. Remove the fuel pump and connect to a 12V source and see if she goes or not. Quote Link to comment Share on other sites More sharing options...
kyteler Posted July 31, 2011 Share Posted July 31, 2011 ....or carefully crack a fuel line connector open/pull a hose off, fuel will spray if it's under the pressure it's supposed to be, so wear safety glasses or just be uber-careful. Once it's cracked open, do a quick key on (not cranking, just ign on) test to see whether fuel is being supplied during the prime. If it's not, or if the fuel pump isn't running at all, then there's your problem. Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Yeh I tried the other night to get the hose off but i was a bit typsy and it was dark. I will follow your advice bro. Cheers. Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Got no fuel pumping out. Got no spark. Quote Link to comment Share on other sites More sharing options...
kyteler Posted July 31, 2011 Share Posted July 31, 2011 Check the fuses again, relays, etc. If nothing obvious, test the fuel pump out of the vehicle or with direct 12V of power, make sure to pull the loom off the pump if you test in place so you don't run 12v to places it shouldn't go. Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Checked all fuses. Can you enlighten me on how to test relays? There are two plugs going to the pump, each with 2 wires. Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 I have not been able to locate a specific relay for the fuel pump. After looking behind the ECU I see a relay that doesn't match any that I have already seen. Could this be the fuel pump relay? Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Wires to fuel pump have power. I will get it out tomorrow. Its been a cunt so far. Quote Link to comment Share on other sites More sharing options...
efp0wa Posted July 31, 2011 Author Share Posted July 31, 2011 Am thinking there could be an igntion module problem (that little box with 2 mins on side of dizzy). Enlighten? Quote Link to comment Share on other sites More sharing options...
efp0wa Posted August 18, 2011 Author Share Posted August 18, 2011 Purchased a replacement dizzy from a wreckers as thought the CAS might be stuffed, bloody dizzy had a rounder plug on it and not square. I don't know if they will refund it or not....spose I can only try I've learnt: Nissan-Mitsubshi RB dizzy has a rectangular plug Nissan-Hitachi RB dizzy has a rounded corner rectangular plug. Anyway I decided I'd give a bunch of plugs a squirt with contact cleaner, waited 30mins or so and plugged them back in. I turned the key and the fuel pump primed! Had #1 Sparkplug out and it was sparking! I think I need to remove all spark plugs and let any possible flooding of the fuel vap away. I also need to re align the dizzy as I think its a tooth off. But good news it I think its going to start! Quote Link to comment Share on other sites More sharing options...
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