deeveus 81 Report post Posted September 3, 2014 Have an issue with the old N12 Pulsar. It's pathetically gutless to say the least but whenst under full acceleration it misfires like a rev limiter almost, if you back off at the same rpm a little the misfire stops allowing the car to accelerate. So far I've replaced the: - spark plugs - air filter - oil filter - fuel filter Also running 95 Ron petrol. I'm guessing it's starving for fuel at this stage but any thoughts would be appreciated Quote Share this post Link to post Share on other sites
Rob HB1 90 Report post Posted September 3, 2014 Graham Tulloch in Levin...he is the man. Quote Share this post Link to post Share on other sites
hybrid 1039 Report post Posted September 3, 2014 local creek ... 3 Quote Share this post Link to post Share on other sites
thorburn 120 Report post Posted September 3, 2014 my first guess would be your spark is dropping out at higher loads. Just another option Quote Share this post Link to post Share on other sites
Young Thrash Driver 1020 Report post Posted September 3, 2014 Have you tried replacing the engine? I just want to know when you're changing your profile pic Quote Share this post Link to post Share on other sites
deeveus 81 Report post Posted September 3, 2014 Not sure it's over fuelling as it isn't giving any signs of fumes from the rear. It's almost as if it's starving. Might be time to whip the carb off and check float levels and a good old clean. It's been sitting for about 4 years so there could be all kinds of sh*t in there. Quote Share this post Link to post Share on other sites
euroriffic 601 Report post Posted September 3, 2014 Yea I'd say the secondary jet is blocked. My ute was doing the opposite a few months ago as main jet was partially blocked so would piss around when on part throttle but full was fine. Can Show you the "Maori" way to clean it out haha Quote Share this post Link to post Share on other sites
deeveus 81 Report post Posted September 3, 2014 Yea I'd say the secondary jet is blocked. My ute was doing the opposite a few months ago as main jet was partially blocked so would piss around when on part throttle but full was fine. Can Show you the "Maori" way to clean it out haha Carb cleaner? Quote Share this post Link to post Share on other sites
euroriffic 601 Report post Posted September 3, 2014 Nah, an old mechanics secret...said not to tell everyone tho Quote Share this post Link to post Share on other sites
KwS 2377 Report post Posted September 3, 2014 Nah, an old mechanics secret...said not to tell everyone tho blocking the carb throat with a rag whilst the engine is running, and before it dies pull the rag away and open it up. rinse and repeat? Apparently it helps suck crap through the jets, unblocking them. Quote Share this post Link to post Share on other sites
euroriffic 601 Report post Posted September 3, 2014 blocking the carb throat with a rag whilst the engine is running, and before it dies pull the rag away and open it up. rinse and repeat? Apparently it helps suck crap through the jets, unblocking them. Dammit! I mean umm, no that's not it... Quote Share this post Link to post Share on other sites
westy 614 Report post Posted September 3, 2014 Real men use their hand.... 1 Quote Share this post Link to post Share on other sites
allan 295 Report post Posted September 3, 2014 (edited) Any help. http://www.ebay.com/itm/Carburettor-Repair-Kit-for-NISSAN-CHERRY-N12-1-5-1983-1986-55kw-/171436779753? https://www.google.co.nz/search?newwindow=1&hl=en&site=imghp&tbm=isch&source=hp&biw=1600&bih=789&q=carburettor+nissan+n12&oq=carburettor+nissan+n12&gs_l=img.12...0.0.0.3583.0.0.0.0.0.0.0.0..0.0....0...1ac..52.img..0.0.0.dVpBeuyedvU&gws_rd=ssl The fuel will have softened the deposits left in the float chamber this will have been sucked through the jets and passages coursing a restriction or blockage as mentioned Suggest you strip the carby down and clean it out carefully replace the gaskets , "O" rings, needle and seat as necessary, reset the float level, check the base plate is not warped then reassemble and try. What condition is the fuel deliver system, like you did mention replacing the fuel filter because if the tank has water or rubbish in it the filter won't last long. Some meths poured into the fuel tank can help the water problem, temporary solution any other rubbish might require a tank removal and clean out. https://www.google.co.nz/search?newwindow=1&hl=en&site=imghp&tbm=isch&source=hp&biw=1600&bih=789&oq=+nissan+n12+carburetor+working&gs_l=img.12...22139.52534.0.55584.20.3.0.17.0.0.241.668.2-3.3.0....0...1ac.1.52.img..20.0.0.NFr2zPJ85T8&q=nissan%20n12%20carburetor%20working&gws_rd=ssl#facrc=_&imgdii=_&imgrc=GKlIrTY8r4rIsM%253A%3BJgm2c8eoeM8uHM%3Bhttps%253A%252F%252Fpartsouq.com%252Fcatalog%252Fimages%252FNissan%252Fpictures%252FUSA%252F261%252Fsecimg.261.0020.png%3Bhttps%253A%252F%252Fpartsouq.com%252Fes%252Fcatalog%252Fnissan%252Fpart%253Fcatalog%253DUSA%2526model%253DN12%2526group%253D160%3B1024%3B560 Edited September 3, 2014 by tim 325 Quote Share this post Link to post Share on other sites
deeveus 81 Report post Posted September 4, 2014 Have tried a few things mentioned here but no go. Planning to remove the carby and pull it to bits over the weekend Quote Share this post Link to post Share on other sites
