70z4fun

Thanks for the reply. Went out this morning and started all over on the carbs from ground zero. Checked everything, pulled the domes and checked the needles, did timing, put new plugs in, and took if for a drive. Ran much BETTER! Starts to run out of power at 4K, but no back fire 🙂 So much happier..........

Ok, I have had this car for years, but ran across a new issue. I am pretty good at getting this car tuned, I have had it since 1979....... Took it to the post office the other day and it ran bad, with backfire and hesitation. Seemed a bit better when I pulled the choke slightly, so I went back to the drawing board. Checked timing, all good, electronic ignition fires all plugs. When I pulled the plugs, the first three cylinder plugs had white on them, so I am thinking those are lean! Ok, go to check that carb, and it seems fine. The adjustment screw is 1.5 turns out, the float chamber is full of gas, and I check to make sure the float level adjustment is correct. Before I go any further, I thought I would check in to see if anyone has any advice. If you have any suggestions, please let me know before I dig deeper........

Greetings all, Finally got my 204z out of the garage, and took it for a drive. Car is running pretty good, but when I got out the timing light, I had to retard the timing and loosen the little 8mm nut on the distributor to get the timing marks to get to 10deg. TDC. Seems odd. It seems like the distributor is usually at "O" when I did timing before. I did mess with the oil pump over the winter, and I thought I had the distributor drive at the "11:25" position. So, could I have it off one tooth? Will it run ok if the timing is off one tooth as long as the distributor is retarded? The car is a series one with stock distributor with electronic ignition. Any advice is appreciated.....

Thanks for the feedback. Yes, I do run a 240z distributor, so that's why it look like the mounting looks that way. The current distributor has electronic aftermarket in it, but I do have another one with points. Need to clean up the vacuum plate on that one. we do use ethanol free fuel, and will install some new plugs. I have been running at 10 degree BTDC I will try to go up to 15 degrees and see if that helps. So like for now, I won't pull the distributor drive. Thanks for the advice Enjoy

Howdy, Working on a 240z that has a 280z motor, N42 block and N42 head. Car runs just kinda OK, but seems to not be right. Thought there was a burnt valve, but compression is good. All valve timing alignments with the cam looks good. Replaced the distributor cap and had the whole thing out. At TDC, I looked at the distributor drive, and it looks to align directly with the mounting bolts. I am getting older, but my memory is that the "line" should be off the left edge of the upper bolt with the angle. I have attached a picture. So, am I off or should I drop the oil pump and take it over one "tooth"? Any advice is appreciated. Thanks Bob

Feels more like a misfire, which brings on the loss in power.......

Greetings all, I have a series one 240z with a L28 with 240z head and carbs. I did install the Petronix Series II electronic ignition. It seems to want to stop power past 5K and I get an occasional exhaust backfire. I am thinking I need to recheck the timing,, as I have been running it at 10 degree before TDC. Have not done the valves for a bit, so was thinking of checking that too. I did just check the carbs for float level and sync them. If I keep the rpm done, it seems to run fine, which is fine for general driving. But it's just not right at higher rpms Any other suggestions would be greatly appreciated

Thanks for the reply Yes, it's a European Distributor, since I looked up the number on it. Competition manual says one spring. Will look for the earlier thread. Fuel system looks good. New fuel lines, fuel tank has been dropped and cleaned. Will check chokes. I looked at spark plugs, all the same but one was a bit cleaner than the rest, So maybe some coolant getting in? Just changed plugs, will look at them again. I did check timing, and put in my stock original distributor until I get the plate cleaned up. Will a sticky plate cause running issues?

OK, Pulled the distributor and found the plate stuck, The diaphragm won't move when I took it off the distributor when I suck on it. I also found that one of the springs in the distributor is missing............

well for starters, I went and pulled the distributor and the vacuum plate does not move, very sticky. I sucked on the vacuum pod, and no movement. I guess I need a new one, I bet that will be fun to find.....

thanks for the response The carbs are stock SU's I just pulled #3 and #4 to see if there was a difference between the two carbs....... I will pull the rest of them, but I expect them all to be the same.......... IF not, that will be another issue.......

Howdy, Just got my 71 240z out and took it for a drive. I had replaced the spark plugs with the stock NGK plugs before the winter season. During the winter, I would start it, move it around, but never really drove it. Today I took it out and had popping ( slight back fire) out the exhaust and no real power when I stepped on the gas. Got it home and checked the #4 and #3 spark plug, and they were black. I did turn the choke off when I was driving and it does not look like it's stuck on. So I am assuming that the issues is mixture on the carbs, but was also thinking of going back to Bosch Platinum plugs. I had good luck with them in the past and on other cars. I always thought that back fire out the exhaust would be a lean condition, so thought I would ask before I dive too far into it. Any advice is appreciated Thanks

Still looking for a early style hinge. I will take a pair if that works better?

I have not had an issue with priming the pump. But I do keep feel in the tank to help. Proper fitting lines help with restricting air...... IF your lines are empty, using a vacuum pump helps too.

Great pictures Yes, the one I have is the picture on the right. I am not sure there is a difference between the upper hinge on the new style vs old. I would love to get a set of upper and lower for the drivers side. However, I would purchase both sides if that is easier. I have see the rebuild kits and have found a few companies that do that kind of work, but need to find a donor set. My driver side is not rusted out but is missing a few parts. I have a little of the typical sag, but the door still works ;-0 IF anyone know of a set for the drivers or a complete set, let me know. Thanks

View Advert Series 1 Drivers side door hinge set? Looking for a drives side door hinge set for a series one 240z. I am looking for a new one that can be refurbished, or one that has been refurbished? Not sure what is out there, but thought i would see if anyone had a used one or if you know if I am dreaming? My current hinge is missing the spring, and has play in it. I do see later model hinges available, but would like to keep it original if possible? Let me know and I appreciate any advice Thanks Bob Advertiser 70z4fun Date 03/12/2022 Price Category Parts Wanted Year 1971 Model 240z

Ok, I feel better 😉 I thought something weird was going on. I know the three way valve on the air filter side is air vent, but for some reason I thought the fuel rail was an air vent too. I noticed that the end has a smaller hole, so it was "squirting" out fuel...... It makes sense that the gas needs to go somewhere...... I will replace that line and make sure that the hose clamps are tight. Thanks Bob

Working on my car today, and I left the return line off where the hard line hose goes into the rubber hose by the fuel filter. Started the car, and a steady stream of fuel came out. Is that normal? I always thought that was an air vapor line? I did not realize that the hose going from the hardline hose that is the return line down on the frame rail had any pressure? I don't even remember checking to see if those clamps were tight....... IF that is not normal, I could use some advice..........

Good point, I will replace the lines first. Can't seem to find a rebuild kit any way..........

Quick update. Got the car started by filling the carb bowls. Moved it in the shop. While it was running, the fuel filter was getting some gas. I decided to replace the fuel lines again, based on what I have read on this forum. Going to go with metric braided hose with new clamps. The current fuel pump on the car Kyosan Denki. IS there a rebuild kit with replacement diaphragms? Maybe the fuel pump is ok?

Thanks for the information. All fuel lines are new and tight. Any idea who the manufacture of the fuel pumps that Z Depot or Motorspots are selling these days?

Thanks for the replies, No problem starting if I put gas in the bowls. The fuel pump is not filling the fuel filter. I just dropped the gas tank and replaced the lines a few years back. I would be interested in one of those fuel pumps...... everything online seems to be an off brand......

So, here I go again.......... It's fuel pump time again. I parked my car for the winter, and I have moved it a few times during the winter, going from one garage to another.... So, yesterday some construction work was being done at the house, so I wanted to move the z out of the way. It sputtered so I just pushed it out of the garage. When I went to put back in, It would not start. I thought it was cold, so I changed the plugs and tried again. Nothing. Cranks over fine. So I pulled the fuel line off the fuel rail and no gas came out after cranking it....... Fuel filter looks empty.......... So, is there a good fuel pump available now days? I few years ago, I got a GMB fuel pump and it failed on the first ride...... Any advice is greatly appreciated.

Howdy, Going to do my rear struts and thought I should think about my half-shafts. Currently running the original half shafts that I have replaced the u-joints awhile ago. I have a spare set of half shafts, so wonder if I should find someone to rebuild my spare set or should I switch over to CV joint driveling? I guess two questions, which is a better option? IF I was to send out my half shafts to be rebuilt, where is a good place to duo that? Any advice is greatly appreciated Enjoy Bob

so I went with the 15" wheels and 205/50-15 Falken tires. There seems to be a few different options available in that size, so I thought I would give it a try. Tires are on order, so hope to see them on the car by the end of next week......