Ka24e won't start help!

Post by **zer0faith** » Wed Dec 30, 2009 10:16 am

1990 nissan 240sx hatch won't start after driving for 20 minutes. shut down while I went to get an estimate which took about three minutes and now it won't start. So what I've done so far...

-replaced spark plugs and rotor button.

-Battery is still good and turns over just doest start.-Less then 1/4 in the gas tank but still primes

Any ideas or suggestion? Cuz I am stumped and pissed.
Modified by zer0faith at 12:33 PM 12/30/2009

Post by **zer0faith** » Wed Dec 30, 2009 11:11 am

update- let the car sit for thirty min and it started up and is now home. What it have it have been? anyone? anyone?

Post by **martins_240sx** » Wed Dec 30, 2009 11:46 am

im gonna say it was you fuel pressure regulator. its on the back end of your fuel rail... next time its does it pull the vaccuum line off and try to start it. If that makes it start then you know what you need

Post by **zer0faith** » Wed Dec 30, 2009 1:22 pm

Hmm thank you I will keep that in mind next time. What would cause that to fail though? Clogging, built up back pressure, low pressure? Just curious

Post by **martins_240sx** » Wed Dec 30, 2009 1:35 pm

im not sure...maybe just old age...but definelty higher fuel psi could damage it.

Post by **sx moneypit** » Wed Dec 30, 2009 1:39 pm

The regulator has a diaphragm inside that can leak and allow fuel to enter the engine through the vacuum supply hose causing it to flood out or run very rich. If you pull the vacuum hose off while the car is running and fuel comes out of the regulator you know it is bad.

Post by **martins_240sx** » Wed Dec 30, 2009 2:09 pm

there you go/\ but keep in mind that fuel doesnt always have to leak out of the fpr for it to be deamed bad, if you had an inline gauge you could check it against a time/pressure method.

Post by **zer0faith** » Wed Dec 30, 2009 3:06 pm

I think I will be checking it tomorrow. But when it comes to doing the gauge and time/pressure method you got me confused bro, care to explain please?

Post by **martins_240sx** » Wed Dec 30, 2009 3:27 pm

your fuel system is supposed to maintain pressure for a certain amount of time. if it doesnt you can count your fpr as a possible culprit.

Post by **r3v_v3ng3** » Wed Dec 30, 2009 3:29 pm

so the engine is cranking right? like the starter is turning the engine over but wont start?

Post by **zer0faith** » Wed Dec 30, 2009 3:43 pm

Ya it turned and everything.

Martin_240sx thanks for the advice and ill look into putting in a gauge.

On some good news my complete rebuild kit came in today!

Post by **sx moneypit** » Thu Dec 31, 2009 3:52 am

Im with Martin on the regulator.A bad regulator can cause your fuel pressure to be to low or to be to high also. Im thinking you might have an ignition problem,have you checked for spark?
Modified by sx moneypit at 5:58 AM 12/31/2009

Post by **zer0faith** » Thu Dec 31, 2009 4:40 am

So I removed both lines from the pressure regulator and it has a bunch of white powder all inside of it... Which I am assuming it mean that it is garbage now?

Post by **sx moneypit** » Thu Dec 31, 2009 5:49 am

The lines may have some residue in them . You can put a vacuum pump where the vacuum hose attaches to regulator to test the diaphragm in the regulator.You will need to check the fuel pressure also.

Post by **zer0faith** » Thu Dec 31, 2009 6:07 am

Ya I have spark... Got electrocuted twice tryin to prove it

Post by **sx moneypit** » Thu Dec 31, 2009 7:47 am

Did you have spark when the car would not start?

Post by **zer0faith** » Thu Dec 31, 2009 8:13 am

yup and just to make sure i put in new plugs and rotor button

Post by **martins_240sx** » Thu Dec 31, 2009 8:23 am

that residue is normal, although if you can see it then that means its prolly where you cant as well, and possibly interferiing with the diaphram sealing

Post by **sx moneypit** » Thu Dec 31, 2009 9:04 am

So are you getting fuel?

Post by **zer0faith** » Fri Jan 01, 2010 8:42 am

yup plenty of fuel pumping through the filter

Post by **martins_240sx** » Fri Jan 01, 2010 12:17 pm

your idea of plenty of fuel can differ from correct amount of fuel. As well as volume of fuel to pressure of fuel. you need to find out how much psi is going to your fuel rail.

Post by **zer0faith** » Fri Jan 01, 2010 4:04 pm

i will be next pay check. going to get a new fpr and a gauge to make sure

Post by **sx moneypit** » Mon Jan 04, 2010 3:11 am

Good idea, hard to diagnose problems without the correct tools!

Post by **zer0faith** » Mon Jan 04, 2010 6:35 am

Unfortunately I wont be able to finish this. This car is offically for sale. It sucks but id rather sale to to someone who has the time to diagnose and fix since im transferring to sea duty so little to no time to put in wrench time. So now I am in the look for a 240 that is in better condition so i can DD it... Thanks for all your help I do appreciate the effort the people from this site has put in to helping me trouble shoot my car. No worries though i'll still be around picking your brains for more knowledge!

Post by **sx moneypit** » Mon Jan 04, 2010 7:03 am

Thanks for your service too! Good luck!

Post by **martins_240sx** » Mon Jan 04, 2010 9:16 am

Good luck man...ship life can get boring quick. I just spent 7 months on the uss new orleans. ports where fun though

Post by **zer0faith** » Mon Jan 04, 2010 11:04 am

ouch I'm going to HSC 9 so ima be doing the world cruise in a year or two

Post by **martins_240sx** » Mon Jan 04, 2010 11:18 am

no idea what that is marine and sailor lingo is way different. i was on the 13th meu.

Post by **zer0faith** » Tue Jan 05, 2010 1:03 am

oh haha my lil brother is in 29 palms he's a marine. what i said was that im getting deployed for about 9 months on a boat

Ka24e won't start help!

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