Jordon

Thanks NewZed, I corrected the firing order. It was right in the FSM but i must of just messed it up. Still no firing though. Fuel is no more than a week old, premium unleaded. I will try the starter fluid on thursday. Is it just in a pressure pack? Is it the same as carburettor cleaner? Thanks

So I have A 1973 240Z that I bought about a year year ago. When I first got it I had some problems, but eventually I got it to start and idle with no problems except a slight hesitation. So my problem is now it won't start. I took the carburetors off and had them pulled apart and cleaned then reassembled. The carbies took so long to get done that I decided to do a mild turbo build with some parts I have laying around. So now I have a 280 ZXT turbo manifold with a T3/04 turbo, attempting to run a blow through setup. There is no piping hooked up to the intake at the moment and I want to try and start it before I do that. So now to the root of the problem. I have spark at the plugs, checked by earthing them one at a time out of the engine and all have spark. (I had no spark with the points so I upgraded to a pertronix ignitor and now I have spark). I also have fuel, checked by both a fuel pressure gauge and taking off the hoses at the carbies and fuel comes out. (I upgraded to an electric fuel pump, for the turbo) So it will crank but there are no signs of it wanting to turn over. I have tried starting it without the fuel pump running with just the residual fuel in the bowl but that didn't work either. My spark plug order was wrong, according to the FSM it is now 156342 going anti clockwise. On a quick side note, I have replaced the plugs, coil, rotor, distributor cap, spark plug wires, fuel hose, fuel pump and pertronix ignitor (as mentioned previously) I am all out of ideas right now.

It has been a long time since I have been on here to post an update. I'm a bit slack in that regard :/ A lot has happened over the last year, but I'm having some timing problems with my engine builder. Wanted the engine finished last year around October but he let me down. bunch of excuses blah blah. He is an awesome guy and knows what he's doing so I have been persevering. Anyway, On the engine side of things. It turns out that the pistons we had would be no good. After much umming and ahhing and a lucky coincidence there was a slight change of plans. I'm not sure If anyone has done it before but we are mating up an RB25 cylinder head on top of the L series block. (coincidentally my engine builder had an RB26 head laying around the shop and he had a look and test fitted it and it turns out that the cylinder bore and head bolts all line up. Not all oil passages or water jackets do but some modifications have been made to get those to either line up or grab an external oil feed for it.) For pistons we are now going with some dished supra pistons and keeping the crank and rods I already had. So now the engine will only displace 3.3L but still better than nothing. The RB25 head fitted to the block with the adjustable cam gears fitted. To make all the timing work out I got an RB25 timing belt crank pulley, which my engine builder has bored out to fit on the L28 crank. At the moment he is in the process of sorting out the tensioner for the timing belt and sorting out the oil pump mount (Dry sump pump going where the old air conditioner compressor mounts,) On other areas I the front end all together with new polyurethane bushes and the assorted parts from T3. With the wheels on it looks great (unfortunately haven't been able to get any photos lately on account of the car being back home while I've been away.) Next I will be moving the car to my garage to pull apart the rear end and get some rear coilovers sorted, put a full spool in the diff and re-bush the rear sub-frame/suspension arms.

I may also have an issue with my float bowls then. I have round top SUs, right now I am just waiting on a replacement float I have just been keeping them topped up manually. I eventually would like to go the pertronix route but that will have to wait till after I sort out the carbies now. Thanks again guys, I will post again after I have the carbies sorted as to whether that solves my problem completely.

Thanks for that miles, I have the car idling great now but I am still having the hesitation but it has moved way up to around 5000rpm. I will get the video and have a go at rebuilding the SUs Thank you again. I spent so much time thinking it was definitely the ignition because I had fuel and just overlooked the carbies being out of tune/needing a rebuild.

Sorry, totally forgot all that It's a 1973 240z. 2.4 stock engine and it's carburetted. Manual transmission.

So after getting the car to start and keeping idle without stalling I started to try and fix my hesitation problems So far I have: *Replaced the spark plugs, mechanical points, ignition leads and coil. (After I did all this I noticed easier starting, less stalling off idle when throttle is applied and no more popping.) *brought cylinder 1 to top dead center, verified by shining a light in and moving the cylinder back and forward until I got it as close as I could. I then pulled the rotor cap off and checked to see that the rotor was pointing at #1 spark plug. I then marked a new timing mark on the balancer as the stock one was nowhere to be seen *checked then checked again to make sure I got my firing order right and the plugs were in the respective places. *I then started the engine, got my timing light hooked up and had a look. Now I'm lost, the mark I made was at least two inches past the 20 degree timing mark, the engine idles well at this point. If I try and retard the distributor it starts to run rough, the same happens when I try to advance it. When I rev the engine at this point either progressively or suddenly it will hesitate and then stall if I keep the throttle applied. Fuel has been checked and my fuel pump is rooted but I am keeping the fuel level up manually Really stuck at the moment. Thanks for your help in advance.

Thanks for your help guys, it was the ballast resistor, completely destroyed wire on one side.

So I just bought a rough 1973 240z yesterday and I'm trying to start it today, if I turn the key to start it it will turn over but as soon as I let go of the key it dies. The fuel bowls have fuel in them If I hold the key just between start and on without engaging the starter after I started the car it will idle, as soon as I let the key return to the on position it dies. Any ideas would be great. Thanks guys.

The rust is a bitch man. Looking forward to see what you do with her.

Thanks man. Its been a long slog so far but so worth it! The rust is a bitch, good luck with it man.

Have you thought about using the AZC Rear brake setup? 4 piston caliper, 12.2" rotor,

So, It has been a long time Since I have posted, but I'm back now. Since I last Updated alot has happened. The paint is nearly complete, The bonnet has to be resprayed again because the apprentice used the wrong screws for the bonnet latch and damaged the surface. (nearly went right through) While it was in the shop I took the front cross member and all the front suspension related gear off the car. I then Sanded the front cross member, lower control arms and the TC rods. They then got painted black. After that I re installed the front cross member, the lower control arms and my T3 front coilovers, TC rods and the bump steer spacers. I had a problem with the wheels I was going to put on, they are 16"x8" with a 0 offset but by the looks of it would at least need a 7mm spacer to clear the springs. I don't want to use a spacer but was thinking of finding someone that could machine a new hum slightly thicker. (10mm for example) While the car was getting painted the wheel wells got done as well. The Handbrake had to be moved closer to the centre of the car to allow the seat I got to fit. Next week some time I will be able to get some photos of the engine bay and the modification done for the seat. The engine has been in the shop for a couple of months now, the bottom end has been clearanced to clear the rods from the longer stroke, the pistons arrive next week, Hopefully have the engine back by the end of the week, The next step is the ECU (going to try a megasquirt ECU) and the wiring. I have decided to make my own wiring loom which I have started the diagrams for and will start wiring up next week. I'll be back next week with photos and another update.

I'm in. Has there been any progress on this one?