Yellow240z73 Posted June 4, 2010 Share Posted June 4, 2010 Ok so i just bought a 1973 240z that has a 1978 280z motor in it, but has dual SU carbs. It sat for awhile, but runs alright, just hesitates at acceleration... Why?? also i did the plugs and cap/rotor/wires and now it runs even worse! to the point that it is really sputtering and hesitating while accelerating. i don't think the Duralast distributor cap is right for the car and can be causing this. any suggestions? also the hood cable broke so now i'm going to have a hell of a time getting the hood back open. how can this be done? Quote Link to comment Share on other sites More sharing options...
neotech84 Posted June 4, 2010 Share Posted June 4, 2010 WOW huge first post...... Have you adjusted/ rebuilt the SU's? That would be a great place to start for the hesitation issues. The hood release problem has me lacking in the idea department. Quote Link to comment Share on other sites More sharing options...
JayBee280 Posted June 4, 2010 Share Posted June 4, 2010 check your spark plug wires and make sure they are going to the right ones. dont indulge into the hard stuff first the most simple items keep these engine running strong. trust i spent a month sorting out a starting problem just to find out my new plugs were foulded when flooded. most likely a spark issue since the items you change made such a difference in the way its running. Quote Link to comment Share on other sites More sharing options...
Yellow240z73 Posted June 4, 2010 Author Share Posted June 4, 2010 Yeah it's most likely not the proper cap or something... I'll put the old one back in along with the rotor... See how that does... Also the fuel filter looks like a snow globe when ya thump it... Possible this is causing my hesitating issue when taking off from an idle? O.o Quote Link to comment Share on other sites More sharing options...
yetterben Posted June 4, 2010 Share Posted June 4, 2010 (edited) Change your filter. Make sure firing order is right 15-36-24. Adjust su's to 1.5 turns out from seated on nozzle. Check timing set if needed. Pull plugs replace with br6es or what ever the factory plug is. Edited June 4, 2010 by yetterben Quote Link to comment Share on other sites More sharing options...
Headstrong280z Posted June 4, 2010 Share Posted June 4, 2010 (edited) also the hood cable broke so now i'm going to have a hell of a time getting the hood back open. how can this be done? Yea, my hood cable was broke also when I got my 76 280, well actually just the handle inside the car. I bought a used cable on ebay or something, it was pretty easy to replace. Oops, hmm, well as far as getting it open.....wow yea let me think about it and ill get back to you. Edited June 4, 2010 by Headstrong280z Quote Link to comment Share on other sites More sharing options...
BOSCARDIN Posted June 5, 2010 Share Posted June 5, 2010 i have the same setup 240 with a 280, mine hestitates in the morning too when i first start it up, and i tried to take it for a drive earlier and it just wouldnt start my car didnt even try, i thought i needed a jump so i called up a friend, still nothing, think i might have the same problem, im gonna check in the morning, but if you figure it out, please help me out. Quote Link to comment Share on other sites More sharing options...
Yellow240z73 Posted June 5, 2010 Author Share Posted June 5, 2010 i have the same setup 240 with a 280, mine hestitates in the morning too when i first start it up, and i tried to take it for a drive earlier and it just wouldnt start my car didnt even try, i thought i needed a jump so i called up a friend, still nothing, think i might have the same problem, im gonna check in the morning, but if you figure it out, please help me out. Our problems may be different. I figured out my duralast cap wasn't right for the car. The one that was on there fits snugly and was made especially for the car, not a universal p.o.s... Anyways, my problem most likely is dirty carbs from sitting so long. I think they need to be rebuilt but i know nothing at all about the SU carbs... They look like they are a pain in the --- to work on. Anyone have a step by step guid to tuning them? How bout with pictures? Or for rebuilding them? I would appreciate it very much Quote Link to comment Share on other sites More sharing options...
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