single cam timing issue? help?? pics and vid.

ONLY for ADVANCED technical discussion about the 240sx!
User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

still kind of new to working on engines so pardon the newbness.

alright so i set the crank to TDC and the cam and distributor look like this (i believe this is the exhaust stroke though so its not how it needs to be set...not sure though.)





when i turn it around again to TDC the cam and distributor look like this (i think this is where the dizzy rotor is supposed to be, its what lines up with 1 on the dizzy cap.)





one problem is that it doesnt line up perfectly with the dissy cap. so after reading the specs under the hood it said its supposed to be set 15* BTDC, so i did that and it lined up just perfect. so i thought that might work. (pic is blurry but it says 15* btdc at the bottom of the chart





so this is what it looks like right before i test it. from bottom right going counter clockwise, 1, 3, 4, 2.



after testing it it sounds just the same as always, maybe a little better.. this video is me cranking it.

http://www.youtube.com/watch?v=oHdPWWjigmE

now the 2nd pic of the cam has the square thing on the cam at the top, i read that that was wrong, so maybe thats why its not starting, im not sure how to correct it though.

does anyone think anything is bent?

any thoughts or imput are greatly appriciated. please help me make my car go nicoclub!



User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

come onnnnnnnnnnnnnnnnnnnnnn....helpppppp???

Cone Junky
Posts: 622
Joined: Sun Jan 20, 2008 8:06 am
Car: S13 fastback
BMW e46 328i
Location: San Diego

Post

The second timing pic is correst. The square notchon the cam sprocket should be at 12 o'clock and the dimple on the sprocket should be at 3 o'clock.

You have the timing on the distributor set at maximum retard. Loosen the bolts and turn the distributor clockwise. The distributor at full clockwise adjustment will set your timing to about 20 degrees, you can then back off a couple of degrees once you get it running.

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

tried it, stronger, but no fire. anyone think it may be a dist problem? maybe a new one would make it fire?

User avatar
locoluna825
Posts: 862
Joined: Fri Mar 28, 2008 12:09 pm
Car: 90 240sx coupe

Post

did you get your car fixed?

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

unfortunately, no, i have not

User avatar
moso
Posts: 801
Joined: Sat Jul 04, 2009 5:14 pm
Car: 89 240sx ka24de 5spd
90 240sx ka24de RIP

Post

what did you do to your motor before this happened? headgasket? timing chain?

best way to determine tdc is remove the no1 sparkplug and place your thumb over the hole. rotate the motor with a socket and wratchet. when it starts blowing air past your thumb you know its in the compression stroke and tdc should happen just as the air stops blowing.

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

the engine was in this condidtion when i bought the car for $400.

it doesnt fire on the compression stroke. it was tdc in the video. it wont even back fire from the exhaust stroke.

idk how to fix it anymore and its driving me crazy.

User avatar
locoluna825
Posts: 862
Joined: Fri Mar 28, 2008 12:09 pm
Car: 90 240sx coupe

Post

well i just wanted to tell you everything looked alright form your photos your wires are correct and the chain is right, its OK for the rotor to be on #4 when its at TDC. when you get it to TDC is the pin aligned with the 2nd mark on the bottom pulley.

Question: Is your fuel pump priming when you go to start the car? and are you getting a spark? just a simple test To check if its priming is, when you have the key set to ON position, right before you start the car. you should hear it prime. Its a noticeable sound when you got the hood up and your listening for it. have someone turn the key to On position while you listen. Dont crank it though.


User avatar
rudeboy
Posts: 139
Joined: Tue Sep 10, 2002 2:21 pm
Car: cars

Post

timing is off. reset all your base timing.i know that no compression sound.reset it all start from scratch.

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

loco- yes i had the pin aligned with the second mark from the left for tdc. yes i hear the fuel pump cut on when i turn the key. but no i am getting no spark, thats my problem. i dont get it.

rudeboy- how do i reset ALL the timing from scratch? can you explain what that all consists of?

thanks guys

User avatar
locoluna825
Posts: 862
Joined: Fri Mar 28, 2008 12:09 pm
Car: 90 240sx coupe

Post

There nothing wrong with the position of your distributor and timing chain its just a matter turning the distributor at the right angle, there's nothing to "reset". Make sure its turned clockwise, all the way. That will set you to 15 degrees before top dead center. That's stock timing. I just went out and tried it on my car with a timing light, so make sure its like that.

It should start even if it were turned all the way counter clockwise i was messing with it and it started. i don't really think your issue here is the timing...

I would check your coil just to confirm it. unplug your coil form your distributor and run a tester to the coil and crank the car up. if you don't get any kind of reading its either your coil or something before that, like a relay or a fuse.
Modified by locoluna825 at 3:54 PM 9/25/2009

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

real noob question. but what should i test it with?

User avatar
moso
Posts: 801
Joined: Sat Jul 04, 2009 5:14 pm
Car: 89 240sx ka24de 5spd
90 240sx ka24de RIP

Post

just pop the coil wire off your dizzy push back the boot and hold the metal lead near a grounded bolt. like your strut mounting bolts. and have someone crank the car. you should see a spark jump from the wire to ground.

Klits562
Posts: 722
Joined: Fri May 15, 2009 8:36 am
Car: white s13 coupe
Contact:

Post

sounds like no spark or fuel check your injectors if you feel like it you can remove the fuel line and see if fuel comes out but be careful lolif your not getting spark its your coil. Check the diagram on your fuse boxes under the hood i think the intake side should be the one with the ign coil check the fuse in there.also listen for any fuses popping when you try to crank it.

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

theres so many lines idk which one the fuel line is. can you tell me? also how do i check the fuse? i know how to check like a regular 10amp fuse but idk how to check the big boxy fuses in the fuse box under the intake. arent those the relays though, under the intake?

User avatar
locoluna825
Posts: 862
Joined: Fri Mar 28, 2008 12:09 pm
Car: 90 240sx coupe

Post

check the fuses in the driver side kick panel, and there's some in the fuse box on the passenger side inside of the engine compartment along with some relays too.

yes the box under the intake is a full of relays i don't believe there are any fuses in it.

if you look at your fuel rail the thing at the top in the middle of the engine there's to lines connected to is you can actually follow one of them to the fuel filter.

User avatar
kraf
Posts: 68
Joined: Wed Feb 18, 2009 8:51 am
Car: sleepy s13 hatch

Post

ok so i checked my distributor and noticed there has never been a ground wire connected. i connected one and that made my plug wires start to spark. so i guess that solves that.

i found the fuel line and disconnected it. i held a cup on it and had a friend turn the car on and it pumped fuel just fine.

so now what could be the problem? bad fuel injectors maybe?

User avatar
locoluna825
Posts: 862
Joined: Fri Mar 28, 2008 12:09 pm
Car: 90 240sx coupe

Post

you have spark and fuel now should start up.

Klits562
Posts: 722
Joined: Fri May 15, 2009 8:36 am
Car: white s13 coupe
Contact:

Post

locoluna825 wrote:you have spark and fuel now should start up.
seriously.....might be injectorsjust cuz theres fuel in the lines doesnt mean the injectors are releasing fuelCheck the o rings on the injectors see if they're damaged, if they are damaged replace them, if not put em back in, either way when you put them back in make sure you use WD40 on the o rings or some kind of lubrication so you dont damage them.

While the fuel rail is off try testing the injectors, take em off and turn the key to on(dont crank the car over)if fuel drips out then your injectors are leaky.Or you can try injectors from a working 240 and try that.

User avatar
locoluna825
Posts: 862
Joined: Fri Mar 28, 2008 12:09 pm
Car: 90 240sx coupe

Post

bad injector seals sooo wont stop your car form starting. before you go rippin injectors off, do this first. test the voltage coming from the harness plug that goes to each injector, while cranking the car you should you get a pulse of voltage from each one. Then test each injector with an ohms meter. if you go pulling injectors out i GUARANTEE You will be buying new seals.

HEY, i just noticed i don't see your intake. is it ALL hooked up? all the hoses hooked up? is there air being directed through the maf???


Return to “240SX Technical Forum”