Poor running and I am at a loss - Suzuki Forums: Suzuki Forum Site
Suzuki Forum Suzuki Forums

» Auto Insurance
» Featured Product
Wheel & Tire Center

Go Back   Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Jimny, Sierra & Samurai Forum
Register Home Forum Active Topics Photo Gallery Garage Search Today's Posts Mark Forums Read Auto EscrowAuto LoansInsurance Advertise

Suzuki-Forums.com is the premier Suzuki All Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
Old 07-23-2015, 07:14 PM   #1 (permalink)
Newbie
 
Join Date: Jun 2012
Location: Tennessee
Posts: 20
Gallery: 0
likembikem is on a distinguished road
Default Poor running and I am at a loss

I need advice as I have about had it. '88 Samurai, stock 1.3 with a Weber I installed 2 years ago. It has been running great. About a month ago while going slow in 1st gear it was loping along terribly. I thought it might be water in the gas, so I added Heet, and Seafoam. It seemed to get a little better and when I got down to 1/4 tank I filled with fresh gas from different station. Problem continued to get worse. Just to cover everything I replaced distributer cap, rotor, plugs, plug wires. Installed new fuel filter and pulled fuel line to carb. Cranked engine and fuel flow was strong. Replaced all the rubber fuel lines. There is no gas smell to the oil and level has not changed. Motor does not smoke. I used propane to test vacuum leaks and thought there might be a leak around the evap can, so I bypassed it and removed EGR valve and made a blank plate. I have been trying to determine if there is a vacuum leak around my Weber adapter but get no response that is consistent. I have replaced the adapter once and was a problem but the vacuum was very obvious. It went from running great to barely running. I feel the age of the Weber makes it less of the problem but I may be wrong of course. My brakes are good and the brake vacuum lines did not react to the propane test. I am wondering if I have a cracked manifold. I think the more I work on it; the worse it is running. Any help would be appreciated and sorry for the long rant.
likembikem is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 07-23-2015, 11:01 PM   #2 (permalink)
Newbie
 
Join Date: Jun 2012
Location: Tennessee
Posts: 20
Gallery: 0
likembikem is on a distinguished road
Default

I'm wondering also (after more time to think about it) if the vacuum advance could do this. Otherwise am I looking at low compression or valve issues? Anyway I'm not seeming to get anywhere with this yet.
likembikem is offline   Reply With Quote Quick reply to this message
Old 07-23-2015, 11:24 PM   #3 (permalink)
Expert
 
caseyjones955's Avatar
 
Join Date: Oct 2011
Location: Black Hills of South Dakota
Posts: 683
Gallery: 0
caseyjones955 is on a distinguished road
Default

I compression check would be good just to make sure it has not sucked a valve or something, if you dont have a comp checker they are pretty cheap to buy. Without hearing it, it's hard to diagnose.

Is there an effect if you ad some choke while its running rough. Does it kill it or smooth it out? From what your saying it sounds like fuel management. I love Webers, how many miles are on it? If nothing else makes sense I might check float bowl level, in my MG days its something I have had to adjust before. Also they can be particular about fuel PSI but if it ran before that should not be an issue.
__________________
87 Samurai ragtop, 16v 1.6L MPFI, Thorley header, 2.25" exh w/magnaflow cat & muffler, full custom dash & instruments, PS, AC, 410 Toyota axles w/rear lockrite and front ARB, Jeep YJ springs, Missing links, 6.4:1 xfer gears with twisted T conversion, early 5 speed, 35x12.5 Wranglers. .
caseyjones955 is offline   Reply With Quote Quick reply to this message
 
Old 07-24-2015, 10:14 AM   #4 (permalink)
Newbie
 
Join Date: Jun 2012
Location: Tennessee
Posts: 20
Gallery: 0
likembikem is on a distinguished road
Default

It seems to smooth out with throttle increase. I felt like after being new 2 yrs ago my Weber might not be the problem but I am open to that possibility. Would a low speed jet cause this? I can't imagine it plugged. I will say this, while driving it all the time it never gave any problem, When the weather got warm it stayed parked more (some) while I rode my bike. But the sitting was minimal as I use it most evenings for short 4 or 5 mile trips. I have got to get a compression tester. Thanks for your reply
likembikem is offline   Reply With Quote Quick reply to this message
Old 07-24-2015, 01:46 PM   #5 (permalink)
Expert
 
caseyjones955's Avatar
 
Join Date: Oct 2011
Location: Black Hills of South Dakota
Posts: 683
Gallery: 0
caseyjones955 is on a distinguished road
Default

No prob. I hope it helps. Webers are great solutions to OEM carbs but they can be somewhat finicky. I often used Dellortos as well as Webers and I found once they were jetted correctly and had the fuel PSI they wanted it was pretty easy going from there.

Check the coil wire and coil terminal, I had one corroded and it had all sorts of Sx that mimicked fuel management issues. I cant think of much else right off the top of my head and I know others that know more than I will have other ideas to but please post the solution when you find it.

I have a Motorcycle that does not like to sit more than 3-4 days or I have to do a Shotgun and blow out the main circuts. It's a carb equipped 1200cc V4 so carbs are not entirely friendly with the shitty fuel at the pumps. X3 for ethanol tainted fuel
__________________
87 Samurai ragtop, 16v 1.6L MPFI, Thorley header, 2.25" exh w/magnaflow cat & muffler, full custom dash & instruments, PS, AC, 410 Toyota axles w/rear lockrite and front ARB, Jeep YJ springs, Missing links, 6.4:1 xfer gears with twisted T conversion, early 5 speed, 35x12.5 Wranglers. .
caseyjones955 is offline   Reply With Quote Quick reply to this message
Old 07-24-2015, 10:35 PM   #6 (permalink)
Newbie
 
Join Date: Jun 2012
Location: Tennessee
Posts: 20
Gallery: 0
likembikem is on a distinguished road
Default

I did think of that but not too detailed. The coil knocked the crap out of me but I will check the connections. It may be it is not firing every time when it should...thanks.
likembikem is offline   Reply With Quote Quick reply to this message
Old 07-28-2015, 09:45 AM   #7 (permalink)
Expert
 
caseyjones955's Avatar
 
Join Date: Oct 2011
Location: Black Hills of South Dakota
Posts: 683
Gallery: 0
caseyjones955 is on a distinguished road
Default

I hope your feeling better this morning, hopefully Dr will give ya something lovely!

Do you use ethanol in the Sami?
__________________
87 Samurai ragtop, 16v 1.6L MPFI, Thorley header, 2.25" exh w/magnaflow cat & muffler, full custom dash & instruments, PS, AC, 410 Toyota axles w/rear lockrite and front ARB, Jeep YJ springs, Missing links, 6.4:1 xfer gears with twisted T conversion, early 5 speed, 35x12.5 Wranglers. .
caseyjones955 is offline   Reply With Quote Quick reply to this message
Old 07-28-2015, 08:47 PM   #8 (permalink)
Newbie
 
Join Date: Jun 2012
Location: Tennessee
Posts: 20
Gallery: 0
likembikem is on a distinguished road
Default

Thanks for asking but we are actually a little worse today. Dr. did give me quite a bit of good stuff. Also unfortunately I have been putting in Ethanol gas, mostly out of convenience (debit card) but I need to go with pure gas, just a little more hassle. I only use that in my bikes. In the winter I drove the Samurai so much I went through a tank pretty quick. You may be on to something. I did do the "run it and clamp hands over the top of the carb till it dies job" thought might help but didn't. But really, I may be out of work for a month with my problems. I can't do anything right now, but sit around buzzed. I'm about to watch Apollo 13 a little later!
likembikem is offline   Reply With Quote Quick reply to this message
Old 07-29-2015, 12:53 AM   #9 (permalink)
Expert
 
caseyjones955's Avatar
 
Join Date: Oct 2011
Location: Black Hills of South Dakota
Posts: 683
Gallery: 0
caseyjones955 is on a distinguished road
Default

I would not use ethanol in any vehicle but ABSOLUTLY not in the Vmax, it seems really finicky carbwise. Around here it's mostly premium and sometimes lowest grade without ethanol. Unfortunately in SD it's still acceptable to sell 85 oct fuel so I'm stuck with premium for all my vehicles, only my Lexus requires premium but the rest get the cheapest non-ethanol choice.

Well, keep pouring the pain control on and if you get buzzed enough you can watch Drawn Together and laugh until your ribs hurt like hell. Seriously I hope you get to feeling better. At least you didnt wax the Max (that might be funny if you have enough opioid pain relief on board).
__________________
87 Samurai ragtop, 16v 1.6L MPFI, Thorley header, 2.25" exh w/magnaflow cat & muffler, full custom dash & instruments, PS, AC, 410 Toyota axles w/rear lockrite and front ARB, Jeep YJ springs, Missing links, 6.4:1 xfer gears with twisted T conversion, early 5 speed, 35x12.5 Wranglers. .

Last edited by caseyjones955; 07-29-2015 at 01:18 AM.
caseyjones955 is offline   Reply With Quote Quick reply to this message
Old 08-05-2015, 11:33 PM   #10 (permalink)
Newbie
 
Join Date: Jun 2012
Location: Tennessee
Posts: 20
Gallery: 0
likembikem is on a distinguished road
Default

Yes, at least I did not 'wax the Max'! that is a good one. Still improving; but not to the point of working on Samurai. Next week for sure.
likembikem is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  Suzuki Forums: Suzuki Forum Site > Suzuki Models > Suzuki Jimny, Sierra & Samurai Forum

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Suzuki Forums: Suzuki Forum Site forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Insurance
Please select your insurance company (Optional)

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 07:32 PM.



Powered by vBulletin® Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus vBulletin Plugins by Drive Thru Online, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.