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Spike0180
Samba Member
Joined: June 06, 2015
Posts: 2269
Location: Detroit, Michigan
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 Posted: Wed Feb 13, 2019 10:27 pm Post subject: Spark plug reading - 3 and 4 are opposite |
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Alright, I read my plugs after about 1500 miles. And cylinder 3 is lean and cylinder 4 is rich (see picture, it's not too crazy off, but enough I want to try to correct it.). That's not a big problem, but wait, are you ready for the likely stupid question? What's the cause? Is it just my idle adjustment isn't right? Or is it a more serious issue?
Engine: 1776cc 9.25 :1 comp angle 110, Italian Weber 40 idfs, massaged (3angle lap job) stock heads, compression is good and even on all cylinders.
#4 Is on the far left, then 3, then 2, and #1 is on the far right.
_________________
Brutis Patches Izabich: 1970 VW Transporter - 1776cc DP
Current State: Projects never truly end...
Location: Grosse Pointe, Michigan
Other cars: 2003 F150, 2003 Jetta GLI vr6-6sp
Sambastic: adj; the quality of being nit picky, elitist, expecting everyone to do things the way they believe is best with no regard to situation, "sambastic" |
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mcdragracer
Samba Member
Joined: December 30, 2007
Posts: 714
Location: Cally
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| Posted: Thu Feb 14, 2019 1:40 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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| It's really hard to tell from the picture although number three kind of looks okay but really need a shot of looking down the inside of the spark plug, for the most part if it runs good you may just have a jetting issue or an adjustment issue, and a lot of times what you will find is that whatever the jet is stamped with that is not actually the size of the hole as they have been altered. |
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Vanillagurilla
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Joined: November 21, 2017
Posts: 1061
Location: California
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| Posted: Thu Feb 14, 2019 2:37 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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| Try adjusting your idle mixture, normal driving your running on the idle jets. Hard to see much of anything with that quality photo. How many miles are on the motor? |
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Spike0180
Samba Member
Joined: June 06, 2015
Posts: 2269
Location: Detroit, Michigan
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| Posted: Thu Feb 14, 2019 5:14 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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Motor milage: 3k
Jets: new from aircooled.net with carbs 1500 miles ago.
Vanilla: I'm kinda thinking the same thing. And the last 30 miles were definitely on the idle circuit because my fan was rubbing so I kept rpm down as much as possible. Around 2k mostly.
_________________
Brutis Patches Izabich: 1970 VW Transporter - 1776cc DP
Current State: Projects never truly end...
Location: Grosse Pointe, Michigan
Other cars: 2003 F150, 2003 Jetta GLI vr6-6sp
Sambastic: adj; the quality of being nit picky, elitist, expecting everyone to do things the way they believe is best with no regard to situation, "sambastic" |
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madmike
Samba Member
Joined: July 11, 2005
Posts: 5292
Location: Atlanta,Michigan
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| Posted: Thu Feb 14, 2019 5:19 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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Gabe , your worrying over nothing  why'd u pull them ? just to check ?or was it 'Missing'?
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works" |
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[email protected]
Samba Member
Joined: August 03, 2002
Posts: 12785
Location: Salt Lake City, Utah
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| Posted: Thu Feb 14, 2019 7:42 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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looks like the electrode is missing from the 1st plug.
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Spike0180
Samba Member
Joined: June 06, 2015
Posts: 2269
Location: Detroit, Michigan
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| Posted: Thu Feb 14, 2019 9:00 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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It does look that way. I'm pretty sure it wasn't and that is just the poor picture quality, but I'll pull it back out and verify. If so, that's likely the reason is was running rich. Or at least showing rich.
Mike: I pulled them because I have the motor out to fix my pouring oil leak, and it was easy to check them quick. I hadn't touched them since installing the new carbs. It's running great (though my carb linkage sucks, that's something else though. And they came with my second hand carbs.), John got the jets right first try I think. Especially with seeing cyl 1 and 2. Great power, smooth transitions even though I'm running a 009 dizzy instead of my 034 currently. I'm really appreciative of that. Thanks John.
_________________
Brutis Patches Izabich: 1970 VW Transporter - 1776cc DP
Current State: Projects never truly end...
Location: Grosse Pointe, Michigan
Other cars: 2003 F150, 2003 Jetta GLI vr6-6sp
Sambastic: adj; the quality of being nit picky, elitist, expecting everyone to do things the way they believe is best with no regard to situation, "sambastic" |
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madmike
Samba Member
Joined: July 11, 2005
Posts: 5292
Location: Atlanta,Michigan
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| Posted: Fri Feb 15, 2019 5:34 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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Haha, if my sons Rally car wasn't taking up the shop I'd be fixin my oil leak too
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works" |
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74 Thing
Samba Member
Joined: September 02, 2004
Posts: 7389
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| Posted: Fri Feb 15, 2019 7:39 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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| Did you discover where the oil leak is coming from? |
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Spike0180
Samba Member
Joined: June 06, 2015
Posts: 2269
Location: Detroit, Michigan
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| Posted: Sat Feb 16, 2019 10:30 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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| 74 Thing wrote: |
| Did you discover where the oil leak is coming from? |
I think it was my oil cooler mount seals, but I'm not 100% sure. I still need to test run the engine before I'm convinced.
Mike: when are you ever going to get your garage back? Lol
_________________
Brutis Patches Izabich: 1970 VW Transporter - 1776cc DP
Current State: Projects never truly end...
Location: Grosse Pointe, Michigan
Other cars: 2003 F150, 2003 Jetta GLI vr6-6sp
Sambastic: adj; the quality of being nit picky, elitist, expecting everyone to do things the way they believe is best with no regard to situation, "sambastic" |
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madmike
Samba Member
Joined: July 11, 2005
Posts: 5292
Location: Atlanta,Michigan
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| Posted: Sun Feb 17, 2019 5:18 am Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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April or May
_________________
'Black Ice'Drag Buggy 'Turbo'
Rail Buggy 1915 turbo
76 Drag/Street bug 2180cc 'Turbo' 11:85 @113 mph"If I go any faster I'll burn up the Hamster" ,gets 28 mpg. also 10/09/22 11.90 @115 mph
"If I'm ever on Life Support,UNPLUG Me, Then Plug me back In see if that Works" |
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Spike0180
Samba Member
Joined: June 06, 2015
Posts: 2269
Location: Detroit, Michigan
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| Posted: Sun Feb 24, 2019 7:48 pm Post subject: Re: Spark plug reading - 3 and 4 are opposite |
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| madmike wrote: |
| April or May |
Lol sounds like when I'll get my motor back in and going.
As for the cyl 4 spark plug that appears to no longer have an electrode, it is there just the same color as the rest of the plug so doesn't show up with my crappy camera.
_________________
Brutis Patches Izabich: 1970 VW Transporter - 1776cc DP
Current State: Projects never truly end...
Location: Grosse Pointe, Michigan
Other cars: 2003 F150, 2003 Jetta GLI vr6-6sp
Sambastic: adj; the quality of being nit picky, elitist, expecting everyone to do things the way they believe is best with no regard to situation, "sambastic" |
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