Timing chain done...now a rough idle/low power issue! Help! - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

csdcowboy · 02-11-2005, 02:52 AM

Alright well I did the timing chain kit on my stock ka24e this last weekend (using http://www.240sx.org/links/installs/timing_chain/). Went fairly well, but took like 12 hours (that includes driving around getting things we forgot...doh!). She started right up and no rattle....oh so nice

Anyways, she's running rough at idle. Sounds kinda like a V8 or something, so I'm assuming it's missing. The reasons for this that I've come up with are:

1. I cracked the mount on the distributor when I was replacing it because I tried to mount the dist. with the spindle indside the front cover. It didn't crack all the way across, but it's pretty substantial. I'm thinking maybe that's throwing my timing off or making me miss or something.

2. I've done some researching (here, mostly) and now I'm wondering if maybe it's the MAFS?

Anyone have any other ideas, things I can check? I've got a new dist. coming in the mail, so that'll be fixed. Any knowledge is appreciated

F3600 · 02-11-2005, 07:08 AM

you should check your timing.. playiing with the timing chain & distributor can alter the timing.If your timing is off you can have idle issue and low power like you discribed

good luck

amolao · 02-11-2005, 07:12 AM

This is basic troubleshooting, ....get a good distributor cover and check your timing....is got to be one of those things....

Ian · 02-11-2005, 07:45 AM

unless you put the chain on backwards...you DID check didnt you?

oh man now you're gonna have to do it all over again!!!

I keed i keed, good luck fixing it

Titan · 02-11-2005, 08:47 AM

You aligned the silver links on the chain to the punchmarks on the sprockets when the motor was at TDC on the compression stroke of #1 right?

You also slid in the oil pump with the two punchmarks aligned?

Other then that, you might have to try a new cover.

bobafett · 02-11-2005, 09:42 AM

matt i have a dizzy off my sohc motor that i just picked up from sean in hillsboro, call me up if you are interested.. alex said he thought yours mihgt need replacing, but didnt know if u already ordered one...

email is [email protected] if you lost it...

o5i2 · 02-11-2005, 11:21 AM

same thing happened to me before. check to make sure all your hoses are connected first. i found out one of mines was partially off, causing a rough idle/low power.

-barry

csdcowboy · 02-11-2005, 03:28 PM

CHRIS - You've got mail!

Quote:

Originally Posted by mainevent212

unless you put the chain on backwards...you DID check didnt you?

oh man now you're gonna have to do it all over again!!!

CRAP!!! I knew we forgot something!!

Yeah, we aligned the silver links with the marks on both gears while at TDC on piston #1.

Just to clarify, I cracked the mounting portion (the metal), not the plastic cover. I wish I had pics, but my batteries are dead in my camera.

csdcowboy · 02-13-2005, 08:21 PM

Well.....none of the above! I checked the vacuum hoses and stuff and those were all fine. So I checked the throttle position sensor like I'd read about, making sure it got enough voltage or something. It seemed to be fine, but when I put my voltmeter on the middle wire (there's 3), the engine cleared up and she sounded perfect, even when I revved it.

So yeah....wierd. I'm gonna get a new tps tomorrow and I'm pretty sure that'll fix it. Either that or my wiring's fucked.

*sykikchimp* · 02-14-2005, 08:57 AM

Quote:

Originally Posted by csdcowboy

Well.....none of the above! I checked the vacuum hoses and stuff and those were all fine. So I checked the throttle position sensor like I'd read about, making sure it got enough voltage or something. It seemed to be fine, but when I put my voltmeter on the middle wire (there's 3), the engine cleared up and she sounded perfect, even when I revved it.

So yeah....wierd. I'm gonna get a new tps tomorrow and I'm pretty sure that'll fix it. Either that or my wiring's fucked.

Or maybe you just need to make sure the ground is good.

02-11-2005, 07:12 AM	#3
amolao Zilvia Member Join Date: Aug 2003 Location: LA....(lower alabama) Age: 61 Posts: 203 Trader Rating: (1) Feedback Score: 1 reviews	This is basic troubleshooting, ....get a good distributor cover and check your timing....is got to be one of those things.... __________________ http://home.sw.rr.com/longstorenissan *UPDATED 13 AUG 05 *

02-11-2005, 08:47 AM	#5
Titan Zilvia Junkie Join Date: Apr 2002 Location: Ontario, Canada Posts: 421 Trader Rating: (0) Feedback Score: 0 reviews	You aligned the silver links on the chain to the punchmarks on the sprockets when the motor was at TDC on the compression stroke of #1 right? You also slid in the oil pump with the two punchmarks aligned? Other then that, you might have to try a new cover. __________________ Sleep Doesn't Drink Beer

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02-11-2005, 02:52 AM	#1
csdcowboy Leaky Injector Join Date: Nov 2004 Location: Corvallis, OR Posts: 146 Trader Rating: (0) Feedback Score: 0 reviews	Timing chain done...now a rough idle/low power issue! Help! Alright well I did the timing chain kit on my stock ka24e this last weekend (using http://www.240sx.org/links/installs/timing_chain/). Went fairly well, but took like 12 hours (that includes driving around getting things we forgot...doh!). She started right up and no rattle....oh so nice Anyways, she's running rough at idle. Sounds kinda like a V8 or something, so I'm assuming it's missing. The reasons for this that I've come up with are: 1. I cracked the mount on the distributor when I was replacing it because I tried to mount the dist. with the spindle indside the front cover. It didn't crack all the way across, but it's pretty substantial. I'm thinking maybe that's throwing my timing off or making me miss or something. 2. I've done some researching (here, mostly) and now I'm wondering if maybe it's the MAFS? Anyone have any other ideas, things I can check? I've got a new dist. coming in the mail, so that'll be fixed. Any knowledge is appreciated

02-11-2005, 07:08 AM	#2
F3600 Zilvia Junkie Join Date: Apr 2002 Posts: 364 Trader Rating: (0) Feedback Score: 0 reviews	you should check your timing.. playiing with the timing chain & distributor can alter the timing.If your timing is off you can have idle issue and low power like you discribed good luck

02-11-2005, 09:42 AM	#6
bobafett Zilvia Member Join Date: May 2004 Location: Vancouver WA Posts: 179 Trader Rating: (0) Feedback Score: 0 reviews	matt i have a dizzy off my sohc motor that i just picked up from sean in hillsboro, call me up if you are interested.. alex said he thought yours mihgt need replacing, but didnt know if u already ordered one... email is [email protected] if you lost it...

02-11-2005, 11:21 AM	#7
o5i2 Leaky Injector Join Date: Dec 2003 Location: Bay Area Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	same thing happened to me before. check to make sure all your hoses are connected first. i found out one of mines was partially off, causing a rough idle/low power. -barry

02-13-2005, 08:21 PM	#9
csdcowboy Leaky Injector Join Date: Nov 2004 Location: Corvallis, OR Posts: 146 Trader Rating: (0) Feedback Score: 0 reviews	Well.....none of the above! I checked the vacuum hoses and stuff and those were all fine. So I checked the throttle position sensor like I'd read about, making sure it got enough voltage or something. It seemed to be fine, but when I put my voltmeter on the middle wire (there's 3), the engine cleared up and she sounded perfect, even when I revved it. So yeah....wierd. I'm gonna get a new tps tomorrow and I'm pretty sure that'll fix it. Either that or my wiring's fucked.