SR won't start

[unikk87]

My car is a nissan 240sx with blacktop SR in it, gaz is coming up , its cranking, wont start , what could it be , MAF? , spark plugs?, ECU? what to check first?

thanx for ur help!!

[compactfean]

Just a couple things, first check to see if you have fuel... listen for the pump, I it works then check fuel pressure. Should have at least 43 with key on and not starting. If all is well. Pull the cas and leave it plugged in and turn the key on and spin it. You should be able to hear all 4 injectors clicking. If good pull rail and put a paper towel under it and spin the cas again. If you have a consistent spray pattern reinstall rail. Then pull each coil and spin cas with a plug in. It. Dont shock yourself! If you dont have spark make sure ignitor backing is properly grounded. If you have fuel and spark and still no start check orange wire at ecu when cranking engine. If have 12 volts you are good. Bring your engine to tdc cylinder on compression stroke and install the cas as fallows. With shaft facing away from you line up the upper right dot (there are two) with the line on the cas and install. Where ever in these steps the testing fails let us know what's going on and we will go from there.

[unikk87]

ok everything seems to be right the ignitor is grounded, but i checked my spark plugs and theres no fire... im not very experienced... but could it be the ECU ? no pulse ?

[compactfean]

How did you check everything else? Did you pull the cas and spin it? Do you have injector pulse? ( injectors ticking) does your ecu bulb light up when you turn the key on? You need to specify what tests you have done and have eliminated for possibilities, otherwise that's like calling someone and asking them what's wrong with your car while sticking your phone in the engine bay...just doesn't work. No spark could be a number of things, eccs relay, no power to ecu, bad grounds, bad ignitor ( must be real savy with a dvom to bench test properly) bad cas. Let us know what you have done and we will go from there. If you are unsure about something ask. ..I take it this is your first sr?

[ssmokerjoe]

i have a sr swap goin on right now and no spark i checked the cas it has power i hear the click for the injectors and smell the gas but still no spark this is my 3rd sr swap and i wired it up the same way as the others and i have some q45 igniters but no pig tails haha so i dont think i can really do any thing with them...