318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine

Notices

Engine Tuneups, chips, wires, spark plugs.

.
» Recent Threads
3 cylinder m44 converted...
Today 12:42 AM
Last post by jerseytim
Today 07:13 AM
2 Replies, 119 Views
1997 318ti DASC E30 LSD...
12-06-2015 06:25 PM
Last post by DustenT
Today 05:00 AM
12 Replies, 4,715 Views
318ti M50 Swap Clutch...
04-22-2019 08:41 PM
Last post by jerseytim
Today 12:53 AM
2 Replies, 346 Views
another hill climb
Yesterday 11:54 PM
Last post by jerseytim
Yesterday 11:54 PM
0 Replies, 87 Views
318ti auto to 328ti auto...
03-16-2019 02:05 AM
Last post by EtherD5
04-23-2019 11:39 PM
33 Replies, 4,897 Views
Wisconsin:1997 318ti...
04-22-2019 04:22 PM
Last post by K12Pilot
04-23-2019 02:34 AM
3 Replies, 365 Views
Mid-Ohio Track Event...
04-22-2019 12:39 PM
Last post by Feffman
04-22-2019 12:39 PM
0 Replies, 194 Views
Mid-Ohio Track Event...
04-22-2019 12:39 PM
Last post by Feffman
04-22-2019 12:39 PM
0 Replies, 98 Views
MVP Track Time 2019...
11-08-2018 12:34 PM
Last post by Feffman
04-22-2019 12:37 PM
1 Replies, 726 Views
MVP Track Time 2019...
04-22-2019 12:37 PM
Last post by Feffman
04-22-2019 12:37 PM
0 Replies, 104 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 11-05-2018, 12:55 AM   #1
B1p0larbear
Junior Member
 
Join Date: Jun 2018
Location: Texas
Posts: 9
iTrader: (0)
Default m42 misfire and smoking

Hello everyone, i have a 95ti with 275k mile. It has been running well for the past few months that i have owned it, every now and then the idle would stumble at a stop but overall okay. I left for work a few days back and had to hold the revs up to keep it running, but there was a noticeable misfire at all rpms. At this point i turned around and took the bike to work until I could mess with it over the weekend. So this weekend I started poking around, when started the idle is still very poor and this time i noticed smoke from the tailpipe, and a smell of raw fuel. I checked for signs of head gasket failure, now water in the oil, or oil in the water. At this point i pulled the plugs knowing i had a fresh set and they needed replacing anyway. Pulled all the plugs and all were dark black and smelled of fuel, also had 3 of 4 tubes saturated with oil. i replaced the plugs and reassembled, with that done i restarted the can and it is still running very poorly and smoking, but not quite stalling. If anyone has any ideas id love to hear them. thank you for reading
B1p0larbear is offline   Reply With Quote
Old 11-05-2018, 11:45 PM   #2
thenjnick
Junior Member
 
Join Date: Aug 2018
Location: Beachwood
Posts: 2
iTrader: (0)
Default

You need to replace your valve cover gasket. The oil is getting into your cylinders causing it to burn (hence the smoking exhaust) as well as your wet plugs/wires making it misfire.


Sent from my iPhone using Tapatalk
thenjnick is offline   Reply With Quote
Old 11-06-2018, 01:00 AM   #3
B1p0larbear
Junior Member
 
Join Date: Jun 2018
Location: Texas
Posts: 9
iTrader: (0)
Default

Thanks for the input, I was planning on ordering a valve cover set along with a new pcv valve. Figure that's as good a place to start as any. I'll keep you posted on the progress.
B1p0larbear is offline   Reply With Quote
Old 11-06-2018, 02:02 PM   #4
thenjnick
Junior Member
 
Join Date: Aug 2018
Location: Beachwood
Posts: 2
iTrader: (0)
Default

Pretty common replacement, mine is starting to seep into the cylinders too, good luck.


Sent from my iPhone using Tapatalk
thenjnick is offline   Reply With Quote
Old 11-09-2018, 07:23 AM   #5
318tiFatherFigure
Junior Member
 
Join Date: Nov 2018
Location: Perth Western Australia
Posts: 21
iTrader: (0)
Default

I doubt it is the valve cover gasket. I would be more looking at valve stem seals or a piston ring problem. Leaking injectors will cause rich running. Check all the vacuum hoses too. Excess crankcase pressure would force oil where you don't need it
If the fuel filter is old it could restrict pressure or allow dirt to jam the injectors open.
Hope some of the ideas strike a chord
318tiFatherFigure is offline   Reply With Quote
Old 11-24-2018, 08:12 PM   #6
B1p0larbear
Junior Member
 
Join Date: Jun 2018
Location: Texas
Posts: 9
iTrader: (0)
Default

Sorry it taken me so long to get back to this, but haven't had a chance to work on it in a while. So I've put the new pcv in, it had come apart. I cleaned out the intake and the pcv passages, and cleaned out the spark plug tubes. Then when for a test drive and found no improvement, in fact it is now backfiring along with the miss, but the smoke is reduced but not gone. At this point I think I'll search checking compression and leak down.


Just finished my compression check. Looks like I hurt cylinder 1, it is at 145 psi while other cylinders are in the 180 psi ballpark. Also have new plugs very black after about 5 miles but that could just be the oil I was burning with the broken pcv.

Last edited by B1p0larbear; 11-24-2018 at 08:53 PM.
B1p0larbear is offline   Reply With Quote
Old 12-01-2018, 11:09 PM   #7
B1p0larbear
Junior Member
 
Join Date: Jun 2018
Location: Texas
Posts: 9
iTrader: (0)
Default

Spent another day looking at her today, inspected and replaced all questionable vacuum lines. I removed the spark plugs again and found them dripping with fuel and with the injectors out I could see a pool of fuel on top of the intake valve for cylinder 1. So possibly failed injectors, or bad o2 sensor.
B1p0larbear is offline   Reply With Quote
Old 12-13-2018, 10:11 PM   #8
B1p0larbear
Junior Member
 
Join Date: Jun 2018
Location: Texas
Posts: 9
iTrader: (0)
Default

Well good news I guess..... found MAF full of water and stuck open. That makes sense to me for running very rich, so I guess it is time to source one of those.


Verified maf as cause of problem. Poured water out and freed up flapper door, and she fired up and ran perfectly. Still going to replace with a new one but happy to say I found the problem. Thanks to everyone that offered advice.

Last edited by B1p0larbear; 12-13-2018 at 11:49 PM.
B1p0larbear is offline   Reply With Quote
Reply

Bookmarks


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 +1. The time now is 04:46 PM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2019, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 85.03 k/101.17 k (15.96%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.