95 ka swap problems. video included - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

forcedfour1012 · 05-16-2010, 06:05 PM

http://www.youtube.com/watch?v=_Tz7HPGo5jA

it runs rly rough and kinda sputters. the power just isn't there. i'm pretty sure its timed correctly.. i dont rly wanna pull the diz back out unless someone rly thinks the timing is still bad.

i dont think its the maf or tps. brand new o2 sensor. brand new wires and on my second set of plugs. i think it may be gettin too much fuel but i dont rly wanna buy an safc unless i have to. plus i have a buddy that just did this exact swap and he isnt using a safc. (his is runnin) we're tryin to get a hold of him so dont tell me to do that lol.

if you need a better vid or more info jus ask.. plz help.

skvngr · 05-16-2010, 07:10 PM

wow, that thing is running pretty rough. If u think you are getting too much fuel, try this to eliminate a possibility. We fixed my brothers car the other day by process of elimination. It had a fuel pump that was going bad.

Make sure there is fuel coming out of your return line.
You can do this by pulling off the rubber return line after the fpr (fuel pressure regulator). You would have to depressurize the lines first by removing the fuse for the fuel pump and cranking the car til it dies. When the line is off, have sumone prime the car (turn key to acc.) while you hold a cup under the end of the fuel line. If there is fuel coming out in a steady stream for about 3 secs, then u can eliminate the problem of a weak fuel pump. If no fuel comes out as was the case with us, then your fpr might be bad but it is most likely your fuel pump going bad. In this case, the fuel pump is too weak to create enough pressure to get through the fpr. hope this helps.

keeeban · 05-16-2010, 07:17 PM

Is everything hooked up correctly to the throttle body? I'm just throwing it out there. Cause when I was cleaning my throttle body the other day and started the car up without the intake tube connected, it sounded similar to this.

importdude · 05-16-2010, 08:02 PM

sounds timing way off ... check dis restab it and check final timing with a gun

sounds also like its has 1 dead cylinder... check to see if all are firing

bl3ujay07 · 05-16-2010, 08:19 PM

sounds like a dead cylinder

forcedfour1012 · 05-16-2010, 08:40 PM

thanks guys for the input. im thinkin about gettin a new cap and rotor cuz the cap i have on it now has some pretty nasty connection things (dunno the right term). I might try restabbin the diz if that doesnt make a dif, hopefully that'll fix the sound of one cylinder not hittin, cuz i know what u guys mean on that.

as for fuel goes.. i think the pump is fine cuz it was on my car for the sohc before we did this swap and my other motor ran great (for a sohc auto.. jk :]) but we pulled of the line right after the filter and i turned the key on and fuel shot out.. and i mean poured out lol.

i hope to god one cylinder isnt dead.. ive been thinkin about doin a compression test. btw if i do have to retime it.. the second dot from the left on the crank pulley is tdc correct?

importdude · 05-16-2010, 09:50 PM

yes 2nd mark is TDC

its also good to have a timing gun to see if you are off

1 cylinder not firing can be from alot of things

no compression
no fuel
no spark

Bad maf
Bad injector
Bad spark plug
Bad spark plug wire

ectt

forcedfour1012 · 05-16-2010, 09:56 PM

ok thanks. and im supposed to set it to tdc when stabbing the diz back in, but is it supposed to spark 20 degrees before when its idling right? so while its running i want the timing light to show that its sparking on the final dot.

idk why it wouldnt b getting fuel and the plugs and wires are new. im gonna get a new cap and rotor tomm cuz the one im using doesn't look too good. ill mayb do a compression test too.

forcedfour1012 · 05-16-2010, 10:03 PM

and the rotor should be a lil before one when i stab it back in right?

forcedfour1012 · 05-18-2010, 11:48 AM

ok so I retimed it yesterday and i heard all four cylinders hittin. so thumbs up right? it seemed to be running smooth. I took it for a ride around the sub and the power still wasnt there. the more i drove it, the more it sounded worse and worse. i think a cylinder or mayb two dont hit at some points. but i got a new cap and rotor today.. it still sounds the same.

basically, the sound of each cylinder igniting jus sounds so hard and not right. does that mean its fuel? compression? coil? helppp. the ignition system is all damn near brand new so im thinkin its fuel..

forcedfour1012 · 05-19-2010, 11:19 AM

anyone else wanna watch the vid and help out? any other ideas besides timing or anything ignition wise??

blackoutt · 05-19-2010, 03:07 PM

I still think it could be timing. Took me quite a few tries to get it right, but there's a thread on NICO that tells how to do it. Just keep working at it with as timing light until you get it right. Also the plugs might not be best after running rich while figuring out timing.

And this should be in tech KA section.

forcedfour1012 · 05-19-2010, 10:43 PM

well ive got the timing perfect. when one hits, it hits at 20 deg btdc. all four jus dont hit consistently. They were all hitting at one point and then they stopped as i drove it around the sub and it got rougher and rougher. I have a buddy that says u can jus burn the shit outa the plugs and reuse them if they jus have fuel caked on them, but i think i might go ahead and get a 3RD set of plugs tomm and try again..

05-16-2010, 06:05 PM	#1
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	95 ka swap problems. video included http://www.youtube.com/watch?v=_Tz7HPGo5jA it runs rly rough and kinda sputters. the power just isn't there. i'm pretty sure its timed correctly.. i dont rly wanna pull the diz back out unless someone rly thinks the timing is still bad. i dont think its the maf or tps. brand new o2 sensor. brand new wires and on my second set of plugs. i think it may be gettin too much fuel but i dont rly wanna buy an safc unless i have to. plus i have a buddy that just did this exact swap and he isnt using a safc. (his is runnin) we're tryin to get a hold of him so dont tell me to do that lol. if you need a better vid or more info jus ask.. plz help.

05-16-2010, 07:17 PM	#3
keeeban Zilvia Addict Join Date: Apr 2010 Location: Bay Area, CA Age: 32 Posts: 924 Trader Rating: (22) Feedback Score: 22 reviews	Is everything hooked up correctly to the throttle body? I'm just throwing it out there. Cause when I was cleaning my throttle body the other day and started the car up without the intake tube connected, it sounded similar to this. __________________

05-16-2010, 08:02 PM	#4
importdude Zilvia FREAK! Join Date: Nov 2006 Location: san j0 Posts: 1,391 Trader Rating: (19) Feedback Score: 19 reviews	sounds timing way off ... check dis restab it and check final timing with a gun sounds also like its has 1 dead cylinder... check to see if all are firing __________________ built ka-t

05-16-2010, 09:50 PM	#7
importdude Zilvia FREAK! Join Date: Nov 2006 Location: san j0 Posts: 1,391 Trader Rating: (19) Feedback Score: 19 reviews	yes 2nd mark is TDC its also good to have a timing gun to see if you are off 1 cylinder not firing can be from alot of things no compression no fuel no spark Bad maf Bad injector Bad spark plug Bad spark plug wire ectt __________________ built ka-t

05-16-2010, 07:10 PM	#2
skvngr Leaky Injector Join Date: Sep 2009 Location: Tacoma, WA Posts: 124 Trader Rating: (7) Feedback Score: 7 reviews	wow, that thing is running pretty rough. If u think you are getting too much fuel, try this to eliminate a possibility. We fixed my brothers car the other day by process of elimination. It had a fuel pump that was going bad. Make sure there is fuel coming out of your return line. You can do this by pulling off the rubber return line after the fpr (fuel pressure regulator). You would have to depressurize the lines first by removing the fuse for the fuel pump and cranking the car til it dies. When the line is off, have sumone prime the car (turn key to acc.) while you hold a cup under the end of the fuel line. If there is fuel coming out in a steady stream for about 3 secs, then u can eliminate the problem of a weak fuel pump. If no fuel comes out as was the case with us, then your fpr might be bad but it is most likely your fuel pump going bad. In this case, the fuel pump is too weak to create enough pressure to get through the fpr. hope this helps.

05-16-2010, 08:19 PM	#5
bl3ujay07 Zilvia Addict Join Date: Feb 2008 Location: norcal(209) and socal(805) Posts: 691 Trader Rating: (6) Feedback Score: 6 reviews	sounds like a dead cylinder

05-16-2010, 08:40 PM	#6
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	thanks guys for the input. im thinkin about gettin a new cap and rotor cuz the cap i have on it now has some pretty nasty connection things (dunno the right term). I might try restabbin the diz if that doesnt make a dif, hopefully that'll fix the sound of one cylinder not hittin, cuz i know what u guys mean on that. as for fuel goes.. i think the pump is fine cuz it was on my car for the sohc before we did this swap and my other motor ran great (for a sohc auto.. jk :]) but we pulled of the line right after the filter and i turned the key on and fuel shot out.. and i mean poured out lol. i hope to god one cylinder isnt dead.. ive been thinkin about doin a compression test. btw if i do have to retime it.. the second dot from the left on the crank pulley is tdc correct?

05-16-2010, 09:56 PM	#8
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	ok thanks. and im supposed to set it to tdc when stabbing the diz back in, but is it supposed to spark 20 degrees before when its idling right? so while its running i want the timing light to show that its sparking on the final dot. idk why it wouldnt b getting fuel and the plugs and wires are new. im gonna get a new cap and rotor tomm cuz the one im using doesn't look too good. ill mayb do a compression test too.

05-16-2010, 10:03 PM	#9
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	and the rotor should be a lil before one when i stab it back in right?

05-18-2010, 11:48 AM	#10
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	ok so I retimed it yesterday and i heard all four cylinders hittin. so thumbs up right? it seemed to be running smooth. I took it for a ride around the sub and the power still wasnt there. the more i drove it, the more it sounded worse and worse. i think a cylinder or mayb two dont hit at some points. but i got a new cap and rotor today.. it still sounds the same. basically, the sound of each cylinder igniting jus sounds so hard and not right. does that mean its fuel? compression? coil? helppp. the ignition system is all damn near brand new so im thinkin its fuel..

05-19-2010, 11:19 AM	#11
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	anyone else wanna watch the vid and help out? any other ideas besides timing or anything ignition wise??

05-19-2010, 03:07 PM	#12
blackoutt Zilvia Junkie Join Date: Sep 2009 Location: Southern IN Posts: 325 Trader Rating: (2) Feedback Score: 2 reviews	I still think it could be timing. Took me quite a few tries to get it right, but there's a thread on NICO that tells how to do it. Just keep working at it with as timing light until you get it right. Also the plugs might not be best after running rich while figuring out timing. And this should be in tech KA section.

05-19-2010, 10:43 PM	#13
forcedfour1012 Join Date: Apr 2010 Location: westland MI Age: 34 Posts: 41 Trader Rating: (0) Feedback Score: 0 reviews	well ive got the timing perfect. when one hits, it hits at 20 deg btdc. all four jus dont hit consistently. They were all hitting at one point and then they stopped as i drove it around the sub and it got rougher and rougher. I have a buddy that says u can jus burn the shit outa the plugs and reuse them if they jus have fuel caked on them, but i think i might go ahead and get a 3RD set of plugs tomm and try again..