Spark plugs fowling out

3

347GT88

New Member

Jun 16, 2019

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1

St. Louis

Jul 17, 2019

#1

• Jul 17, 2019

• #1

I am running the mspnp 8693 on a 347 na with 30# injectors and I just installed the wideband O2 sensor and changed the spark plugs. I have maybe 30 minute of idle time on the new plugs. I was getting ready to set my timing and it started to die and finally did. Is there a setting I need to configure that's causing this. This is the second set of plugs in a row.

 

a91what

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10 Year Member

Apr 6, 2011

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Hillsborough county

Jul 17, 2019

#2

• Jul 17, 2019

• #2

You have to get into the ve table and tune the idle fuel. It is set rich on purpose in the base tune.
Shoot for 13.8 AFR at hot idle

 

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a91what

SendMeUrDataLog

10 Year Member

Apr 6, 2011

10,739

6,720

214

Hillsborough county

Jul 17, 2019

#3

• Jul 17, 2019

• #3

Also make sure in general settings the "incorporate afr" box is set.

 

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3

347GT88

New Member

Jun 16, 2019

15

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1

St. Louis

Jul 17, 2019

#4

• Jul 17, 2019

• #4

Thank you.

 

3

347GT88

New Member

Jun 16, 2019

15

0

1

St. Louis

Jul 17, 2019

#5

• Jul 17, 2019

• #5

a91what said:

You have to get into the ve table and tune the idle fuel. It is set rich on purpose in the base tune.
Shoot for 13.8 AFR at hot idle

Click to expand...

Thanks , I figured it was a setting I was missing. I was trying to get the timing down and was completely shocked how fast the plugs fowled out again.