hey all ok so there is yet another post titled zed wont start. I did search past threads and tried to do everything in those threads to help me out. And i am still left with a car that is succesfully turning over but just wont start. Before i did the rebuild, the car ran fine... so beleive that the coil packs are ok. New spark plugs so guessing they arent the problem. Tested the injectors connectors with a noid while turning them over, and light flashed, so injectors arent the problem. Injectors are brand new, so guessing they arent the problem. Fuel pump primes when car goes to accessories, and there is fuel in the line, (i know cos when i checked it squirted on my brother - quite funny) Starter motor is ok... cos its turning over, same with the battery, so guessing its not an earth to do with either of these. Removed the PTU and tested the connectivity with a multi meter, and all read fine as according to the tech manual. Really funning low on ideas and any help would be greatly appreciated. I didnt wanna just give up and ask so thought i would test as many things as i could think of before i asked... Rebuild involved new pistons, turbos, injectors, bearings... and yeah if that makes a difference, dont think it does. Please help and sorry about the lengthy thread but thought i should try and give as much info as possible.
Fuel lines from filter around the correct way? (looks at 90TTZ) lol CAS fitted correctly? Is it trying to turn over? Or just dead dead?
does the engine fire or try to start at all? My first thought would be to check the cam timing just to make sure....... I would hate to see that wrong. When that is confirmed check all the wiring harness connectors especially PTU and CAS. After you have tried starting it are the sparkplugs wet with fuel - can you hear the injectors ticking while trying to start it.
Cas and put both checked, cleaned and rechecked. They are fine. Cam timing is perfect as dots lined up with timing belt marks and harmonic balancer TDC point. Piston 1 was also confirmed at top dead centre while harmonic balancer was at starting point. The car is turning over perfectly normally like it wants to start... It just won't actually start... Can't figure out why... Any other suggestions???
long shots as well but how much voltage in the battery, too little and there may be enough to turn the car over but not to start it. also may pay to check fuses relays etc just to ensure nothing has been accidentally fried. I don't expect these to really be the issue just throwing in some basic checks to make sure nothing is missed before too much panic arises.
I am just guessing, but your guess of its new so it should probably work is probably not a good guess, check everything properly. Are the spark plugs wet with fuel after an attempted start Do all the plugs give good spark when earthed against the car, not 100% sure how to do this but someone else should be able to explain? Good Luck
ok well thanks for all the suggestions, and they are all good ones, but unfortunately none have worked. Checked the ecu codes, flashed 55. Spark plugs remved and were dry, then when earthed to the body, they did spark. So i have air, fuel, and spark, and yet the car wont start. Every earth i can find is connected... so i dont think that is the problem. Voltage on the battery is fine. Are there any major earths that might effect the car starting more than others, that i might be able to recheck and reearth??? Wow this thing is causing a major headache, i have checked all the new components, except injectors.. im not sure how to check if the unit actually squirts fuel.. but if they dont, wouldnt it start with a miss, unless all 6 are faulty, which would be crazy unlucky right? any other suggestions?? about to quit and send it to a 300zx specialist, which i was realy trying to avoid...
Spark plugs dry is a possible clue: multiple attempts to start even with good ignition will almost always leave wet/damp plugs. Check fuel delivery at the fuel regulator (which is past the injectors in the fuel line). You said there was fuel in the line but where was this checked? Also how long were the injectors sitting on the shelf whilst the engine was rebuilt? Injectors left for long periods without use can gum up.
You can take the cas out and leave it plugged in and with the ignition on and then rotate the shaft on the cas you should hear each injector fire off, as you rotate the shaft.
yeah check if injectos are firing, also check that the fuel lines are all connected correctly, also check fuel lines as far down the line as possible, is it getting pressure all the way to the fuel rail?
He's used a noid light to confirm the injectors are firing, but that doesn't tell you whether fuel is getting to them or being passed through them. Unless injectors have been sitting around in the open air for a couple months+, they should be OK. My bet is on a blockage somewhere or perhaps fuel inlet/outlet lines crossed over at the fuel filter.
ok so holy hell... it actually started.... i cant beleive its this simple... but the amount of checks that i have dont on this car is so rediculous that i was looking at a noose with a slight grin.... im so sorry to bother people on this site but after everything it turned out that the two fuel lines were around the wrong way. I feel like such a retard after managing to master the entire rebuild and then to be held back by this is embarrasing. But thankyou again for all those that posted... i appreciate the time and effort to help me out. cheers and after the exhaust, front bar and tuning is done, i will see u on the next cruise, known as the guy that got the fuel lines round the wrong way. cheers all
Check all connectors. I know it sounds dumb but when i did my motor/turbos/susp./breaks/clutch 8 months off road i forgot to reset my immobiliser.
