Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Go Back   Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum > General > Tech Talk

Tech Talk Technical Discussion About The Nissan 240SX and Nissan Z Cars


Reply
 
Thread Tools Display Modes
Old 12-07-2018, 08:13 PM   #1
xpinoyxmk
Zilvia Addict
 
Join Date: Feb 2009
Location: FL
Posts: 704
Trader Rating: (11)
xpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura about
Feedback Score: 11 reviews
sr20 sounds as if its running on 3 cylinders

Need help.

Little background:

Went in for a car alignment last week, everything was good. Then yesterday I go to start the car and it sounds like a subaru, rev a couple times, very difficult to rev and it breaks up bad, and smoke coming out of the exhaust (heavy fuel smell). Caught me off guard, my assumption is that its running on 3 cylinders, so I go thru the regular procedure.

Spark, begin unplugging each connector to each coil pack, with #1 unplugged nothing changes, all others have a noticeable difference.

Fuel, same with pulling the connector. All have a slight but noticeable difference. Pulled the rail to see if the injectors are leaking or stuck open. They check out all good.

Checked for air/boost leaks, none.

Pulled the valve cover to see if anything was loose or a rocker arm fell off. Nope nothing.

Decided to test to see if anything changed if i pulled the fuel pump fuse. Normally it should die pretty fast... Nope, begins to idle normally except at 2000 rpms and stays running until i try to rev, then it will die. I assume its only running good because the excess fuel is burning off. Also longest i let it run, after pulling the fuel pump fuse, until I would rev it is about 30 sec.

Z32 mafs has been verified good. With it unplugged, there is no change for the better or worse. Also my tuner said the stock fpr's could be the issue.

If anyone has any information that could help, I'd greatly appreciate it.

Details on my car for reference:

180sx, original sr20, gtx2867r, hks 740cc, z32 mafs, enthalpy tune

Edit:
-swapped coil packs between #1 and #2, no change still on #1 unplugged
-replaced spark plugs with bkr7e's, gapped at .028, no change

Unsure if this is related but my fuel pump stopped priming/working for a short time.

Last edited by xpinoyxmk; 12-10-2018 at 10:58 AM..
xpinoyxmk is offline   Reply With Quote
Sponsored Links
Old 12-07-2018, 08:16 PM   #2
e1_griego
Premium Member
 
e1_griego's Avatar
 
Join Date: Sep 2004
Location: Independence, Ore.
Age: 36
Posts: 2,642
Trader Rating: (24)
e1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond reputee1_griego has a reputation beyond repute
Feedback Score: 24 reviews
Did you swap coil packs around to see if the dead cylinder followed the #1 coilpack? It's a pretty common failure.
e1_griego is offline   Reply With Quote
Old 12-07-2018, 08:23 PM   #3
xpinoyxmk
Zilvia Addict
 
Join Date: Feb 2009
Location: FL
Posts: 704
Trader Rating: (11)
xpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura about
Feedback Score: 11 reviews
Quote:
Originally Posted by e1_griego View Post
Did you swap coil packs around to see if the dead cylinder followed the #1 coilpack? It's a pretty common failure.
Yes I swapped #1 and #2. Still was the same on #1.
xpinoyxmk is offline   Reply With Quote
Old 12-07-2018, 09:34 PM   #4
Sr20-Vert
Leaky Injector
 
Sr20-Vert's Avatar
 
Join Date: Mar 2011
Location: hollywood
Age: 35
Posts: 136
Trader Rating: (1)
Sr20-Vert is a well-known jackass
Feedback Score: 1 reviews
Quote:
Originally Posted by xpinoyxmk View Post
Yes I swapped #1 and #2. Still was the same on #1.
Take spark plugs out and check them all
Sr20-Vert is offline   Reply With Quote
Old 12-08-2018, 10:41 AM   #5
xpinoyxmk
Zilvia Addict
 
Join Date: Feb 2009
Location: FL
Posts: 704
Trader Rating: (11)
xpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura about
Feedback Score: 11 reviews
Quote:
Originally Posted by Sr20-Vert View Post
Take spark plugs out and check them all
Ended up replacing them too. No change.
xpinoyxmk is offline   Reply With Quote
Old 12-08-2018, 11:55 PM   #6
Quiche2192
 
Join Date: Oct 2018
Location: FL
Age: 29
Posts: 24
Trader Rating: (0)
Quiche2192 is an unknown quantity at this point
Feedback Score: 0 reviews
You getting any codes from the ECU? I'm having the same issue and I've narrowed it down to the knock sensor.

Haven't gotten to it yet, so I'm not 100% sure, but both our cases seem like a knock sensor issue. Breaking up bad when revving. Although for me it only happens under load. Check if your ECU is throwing code 34.

Oh and if your fuel pump stopped priming, it might be an electrical issue. I had the ground on my alternator go bad, which made everything go whack.
Quiche2192 is offline   Reply With Quote
Old 12-10-2018, 10:54 AM   #7
jedi03
Nissanaholic!
 
Join Date: Jul 2008
Location: albuquerque
Posts: 1,784
Trader Rating: (8)
jedi03 is on a distinguished road
Feedback Score: 8 reviews
happened to me when had coupler on intercooler come loose...
jedi03 is offline   Reply With Quote
Old 12-10-2018, 10:57 AM   #8
xpinoyxmk
Zilvia Addict
 
Join Date: Feb 2009
Location: FL
Posts: 704
Trader Rating: (11)
xpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura about
Feedback Score: 11 reviews
Quote:
Originally Posted by Quiche2192 View Post
You getting any codes from the ECU? I'm having the same issue and I've narrowed it down to the knock sensor.

Haven't gotten to it yet, so I'm not 100% sure, but both our cases seem like a knock sensor issue. Breaking up bad when revving. Although for me it only happens under load. Check if your ECU is throwing code 34.

Oh and if your fuel pump stopped priming, it might be an electrical issue. I had the ground on my alternator go bad, which made everything go whack.
No way to check codes. Your issue is most likely different since its only under load.

Quote:
Originally Posted by jedi03 View Post
happened to me when had coupler on intercooler come loose...
All couplers are good. No leaks.
xpinoyxmk is offline   Reply With Quote
Old 12-12-2018, 11:35 AM   #9
xpinoyxmk
Zilvia Addict
 
Join Date: Feb 2009
Location: FL
Posts: 704
Trader Rating: (11)
xpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura about
Feedback Score: 11 reviews
Just an update.

Started the car for 10sec then pulled all plugs to see if any were coated with gas. #1 was. Proceeded to switch injector #1 with #2 and retest. Again ran for 10sec and pulled 1 & 2 plugs. This time #2 plug was coated with gas. Removed all injectors and having them serviced locally.
xpinoyxmk is offline   Reply With Quote
Old 12-21-2018, 04:20 PM   #10
inopsey
Nissanaholic!
 
Join Date: Jul 2008
Location: canada
Posts: 1,665
Trader Rating: (21)
inopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant futureinopsey has a brilliant future
Feedback Score: 21 reviews
what is the compression on that engine??
inopsey is offline   Reply With Quote
Old 12-22-2018, 02:34 PM   #11
xpinoyxmk
Zilvia Addict
 
Join Date: Feb 2009
Location: FL
Posts: 704
Trader Rating: (11)
xpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura aboutxpinoyxmk has a spectacular aura about
Feedback Score: 11 reviews
Haven't done a compression test yet.

Just put the injectors back in after service, did an oil change (gas smell in oil), and reconnected the battery.

Ran good on first start up so I shut it off. Rechecked the oil capacity, topped it off, then went to restart and its running like crap again.

Threw in some fresh plugs gapped at .028 and it made no difference.

Just noticed the red light on my ecu stays on while running and my fuel pump definitely doesn't prime as long as it should be.

Bad ecu maybe?
xpinoyxmk is offline   Reply With Quote
Reply

Bookmarks


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -6. The time now is 03:26 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
vB.Sponsors
Copyright © 1998 - 2019, Zilvia.net™