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08-04-2017, 12:09 PM
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#1 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,786
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Re: Spark Plugs What is wrong?
Timing!!
What's initial timing? |
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08-04-2017, 01:03 PM
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#2 |
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Registered User
Join Date: Oct 2012
Location: Rose Hill Kansas
Posts: 1,351
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Re: Spark Plugs What is wrong?
What's the gap on the plugs?...should be 45
__________________
1970 C10 Short Stepper with 71/72 front clip. |
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08-04-2017, 02:17 PM
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#3 |
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Registered User
Join Date: Jun 2014
Location: lakefield,mn
Posts: 566
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Re: Spark Plugs What is wrong?
Do a leak down test sounds more like a mechanical issue. Also check and make sure that the power feed for the distributer is a full voltage and not the factory resistance wire.
__________________
68 c10 swb stepper 68 c10 swb stepper 67 c10 lwb 06 gmc duramax |
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08-04-2017, 07:41 PM
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#4 |
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Moderator
 
Join Date: Jun 2017
Location: Cherryville, NC
Posts: 2,210
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Re: Spark Plugs What is wrong?
Cyl 3,4 and 6 all look like water contamination within the combustion chamber...
Compression test and leak down test...most likely blown head gasket between 4 and 6... Could also be a lean out due to manifold crack...is this a two barrel or four barrel carb? Open plenum manifold or closed ? |
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08-04-2017, 08:01 PM
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#5 |
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Senior Member
 
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Spark Plugs What is wrong?
I would get a correct set of matched plugs gapped correctly and run it again before you get too crazy trying to diagnose whats wrong , the threads don't even look the same length let alone the heat range can't be the same .
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08-04-2017, 10:33 PM
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#6 | |
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Registered User
Join Date: Jul 2010
Location: texas
Posts: 180
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Re: Spark Plugs What is wrong?
Quote:
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08-04-2017, 10:29 PM
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#7 | |
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Registered User
Join Date: Jul 2010
Location: texas
Posts: 180
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Re: Spark Plugs What is wrong?
Quote:
bought truck from....carbs are not the problem both that I have tried run perfect on my other truck. |
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08-04-2017, 10:27 PM
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#8 | |
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Registered User
Join Date: Jul 2010
Location: texas
Posts: 180
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Re: Spark Plugs What is wrong?
Quote:
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08-04-2017, 10:26 PM
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#9 | |
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Registered User
Join Date: Jul 2010
Location: texas
Posts: 180
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Re: Spark Plugs What is wrong?
Quote:
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