breaking up problem (with video) - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

wutangben · 07-31-2012, 08:17 PM

0:00-1:40 is about the same, so you can skip to 1:40ish if you're bored.

Having a new issue with my SR, started a month or two ago.

Last couple events, every once in a while the car would fall on it's face. I'd have to shut the car off, let it sit for a minute, then start it back up and it would be fine, ready to rip. It usually smelled like fuel after it would fall on it's face and die.

Can't seem to figure out what it is. Today, I replicated the problem on the street, and this time the car started back up immediately, when i restarted it, and then was fine again.

I'm running iridium plugs that are properly gapped.
Swapped out the ignitor.
Swapped out the MAF.
It's happened on the track drifting, road racing, and then also on the street when driving very slow/chill.
I can drive 100 miles without it happening at all, it's random.

I purchased some new coilpacks as a backups just in case, but haven't installed them yet.

Can anyone make sense watching the video? Does that seem like 2cyl or 3cyl to you guys? Can you think of any problems that go away just by restarting the car?

I'm running a nistune'd ECU.

Any advice would be appreciated, I've got a drift event to leave for on Friday.

Thanks,
Ben

JANK240 · 07-31-2012, 08:30 PM

My car was doing this exact same thing for months couldnt figure it out for nothing. Turned out there was a short in my wiring harness from the wires being stretched. Cant say thats what is causing yours to act up but it wouldnt hurt checking.

wutangben · 07-31-2012, 08:32 PM

did it fix itself when you'd restart the car?

where did you find the short?

JANK240 · 07-31-2012, 08:45 PM

Yea sometimes it would immediately after other times after letting sit for 20 mins or so.
I think it was in the MAF wires if i remember right.

cotbu · 07-31-2012, 08:54 PM

Part of your problem is; you think after you restarted it, it was fine!
I could break it down for you but, you'd just argue, anyway!

Sileighty_85 · 07-31-2012, 09:11 PM

seems like MAFS, When I pop slutes on my SR86 my engine acts like that.

Vitzio240sx · 07-31-2012, 09:17 PM

My ka did the same thing and it turned out to be a bad fuel pump.

wutangben · 07-31-2012, 10:49 PM

i've tried a different maf, maybe i'll try a third, and inspect the plug some more.

fuel pump is a walbro that's only a year and a half old. my last one i bought used, and had it for 6 years or so, i replaced it with this new one when i was trying to diagnose a different problem.

the car has done this 7 times in the past 700+ miles driven. it's hard to replicate, otherwise it runs fine.

cotbu · 08-01-2012, 12:02 AM

Check the ecu for codes!
Check mafs wiring as well as the plug.

wutangben · 08-01-2012, 06:05 AM

not sure what's up with zilvia, but i can't see any of the pics in the last two posts right now.

checked the ecu, no codes (55)

blueshark123 · 08-01-2012, 07:12 AM

The last 2 post before yours are spam

codyace · 08-01-2012, 07:56 AM

I recently had a car in with this same issue. All wiring was good in regard to MAF and CAS back to ecu. No major shorts found. Once I removed the daughterboard the car ran marginally better but the same.

Owner found a second ECU for it, and it cleared the issue up completly.

supakat · 08-01-2012, 08:12 AM

Check resistance with the CTS.

wutangben · 08-02-2012, 09:15 AM

think i found my problem. there were some pieces of a latex glove in my gas tank. looks like about a fingertip worth split into like 20 pieces. fished most of them out, and no problems since.

thanks for the help, fingers crossed that this was it.

07-31-2012, 08:17 PM	#1
wutangben Zilvia Addict Join Date: Sep 2003 Location: IL Age: 44 Posts: 739 Trader Rating: (3) Feedback Score: 3 reviews	breaking up problem (with video) 0:00-1:40 is about the same, so you can skip to 1:40ish if you're bored. Having a new issue with my SR, started a month or two ago. Last couple events, every once in a while the car would fall on it's face. I'd have to shut the car off, let it sit for a minute, then start it back up and it would be fine, ready to rip. It usually smelled like fuel after it would fall on it's face and die. Can't seem to figure out what it is. Today, I replicated the problem on the street, and this time the car started back up immediately, when i restarted it, and then was fine again. I'm running iridium plugs that are properly gapped. Swapped out the ignitor. Swapped out the MAF. It's happened on the track drifting, road racing, and then also on the street when driving very slow/chill. I can drive 100 miles without it happening at all, it's random. I purchased some new coilpacks as a backups just in case, but haven't installed them yet. Can anyone make sense watching the video? Does that seem like 2cyl or 3cyl to you guys? Can you think of any problems that go away just by restarting the car? I'm running a nistune'd ECU. Any advice would be appreciated, I've got a drift event to leave for on Friday. Thanks, Ben

07-31-2012, 08:54 PM	#5
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Part of your problem is; you think after you restarted it, it was fine! I could break it down for you but, you'd just argue, anyway! __________________ LoverTechnologies "Half Broken Things!"

07-31-2012, 09:11 PM	#6
Sileighty_85 Post Whore! Join Date: Dec 2006 Location: Misawa, Japan Posts: 6,815 Trader Rating: (8) Feedback Score: 8 reviews	seems like MAFS, When I pop slutes on my SR86 my engine acts like that. __________________ 後輪駆動車１番 1989 Built SR GT2871R -363whp 1998 S14 W/RB25- 250ish (For Now) 1986 SR86 - 200ish 1990 R32 GTR - 320hp Don't Buy Engines from JDM-Online http://zilvia.net/f/businesses/207457-jdm-online.html Don't Buy XS-Power or SSAC Shit

07-31-2012, 09:17 PM	#7
Vitzio240sx Leaky Injector Join Date: Feb 2011 Location: FL Posts: 121 Trader Rating: (1) Feedback Score: 1 reviews	My ka did the same thing and it turned out to be a bad fuel pump. __________________ "Men with guts attack those corners!"-Keiichi Tsuchiya

08-01-2012, 12:02 AM	#9
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Check the ecu for codes! Check mafs wiring as well as the plug. __________________ LoverTechnologies "Half Broken Things!"

07-31-2012, 08:30 PM	#2
JANK240 Leaky Injector Join Date: Nov 2011 Location: 903 Age: 35 Posts: 78 Trader Rating: (7) Feedback Score: 7 reviews	My car was doing this exact same thing for months couldnt figure it out for nothing. Turned out there was a short in my wiring harness from the wires being stretched. Cant say thats what is causing yours to act up but it wouldnt hurt checking.

07-31-2012, 08:32 PM	#3
wutangben Zilvia Addict Join Date: Sep 2003 Location: IL Age: 44 Posts: 739 Trader Rating: (3) Feedback Score: 3 reviews	did it fix itself when you'd restart the car? where did you find the short?

07-31-2012, 08:45 PM	#4
JANK240 Leaky Injector Join Date: Nov 2011 Location: 903 Age: 35 Posts: 78 Trader Rating: (7) Feedback Score: 7 reviews	Yea sometimes it would immediately after other times after letting sit for 20 mins or so. I think it was in the MAF wires if i remember right.

07-31-2012, 10:49 PM	#8
wutangben Zilvia Addict Join Date: Sep 2003 Location: IL Age: 44 Posts: 739 Trader Rating: (3) Feedback Score: 3 reviews	i've tried a different maf, maybe i'll try a third, and inspect the plug some more. fuel pump is a walbro that's only a year and a half old. my last one i bought used, and had it for 6 years or so, i replaced it with this new one when i was trying to diagnose a different problem. the car has done this 7 times in the past 700+ miles driven. it's hard to replicate, otherwise it runs fine.

08-01-2012, 06:05 AM	#10
wutangben Zilvia Addict Join Date: Sep 2003 Location: IL Age: 44 Posts: 739 Trader Rating: (3) Feedback Score: 3 reviews	not sure what's up with zilvia, but i can't see any of the pics in the last two posts right now. checked the ecu, no codes (55)

08-01-2012, 07:12 AM	#11
blueshark123 Post Whore! Join Date: Apr 2006 Location: North Jersey Posts: 5,481 Trader Rating: (55) Feedback Score: 55 reviews	The last 2 post before yours are spam

08-01-2012, 07:56 AM	#12
codyace Post Whore! Join Date: Dec 2004 Location: Poconos, PA Age: 40 Posts: 8,030 Trader Rating: (58) Feedback Score: 58 reviews	I recently had a car in with this same issue. All wiring was good in regard to MAF and CAS back to ecu. No major shorts found. Once I removed the daughterboard the car ran marginally better but the same. Owner found a second ECU for it, and it cleared the issue up completly. __________________ *Want Air Conditioning in your SR20 Swapped car? Check out www.sr20acbrackets.com for more information! Quest Alternator Conversions for SR20!* Check my Group Buy! Tired of lousy internal gates? Go external wastegate with one of my manifolds, Check out my group buy

08-01-2012, 08:12 AM	#13
supakat Leaky Injector Join Date: Jan 2012 Location: FL Age: 42 Posts: 57 Trader Rating: (0) Feedback Score: 0 reviews	Check resistance with the CTS. __________________ 12.96 @ 116.36 - Build Thread

08-02-2012, 09:15 AM	#14
wutangben Zilvia Addict Join Date: Sep 2003 Location: IL Age: 44 Posts: 739 Trader Rating: (3) Feedback Score: 3 reviews	think i found my problem. there were some pieces of a latex glove in my gas tank. looks like about a fingertip worth split into like 20 pieces. fished most of them out, and no problems since. thanks for the help, fingers crossed that this was it.

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