Guys that have had air leaks

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05-05-2009, 03:19 AM

#21

lucky77

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having the same problem . . with my truck dude.. ever since the cam swap . . im getting a leak.. i keep getting code P1174 . .I'VE Checked everything.. and could not find anything.. does it throw a code at WOT?

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05-05-2009, 07:11 PM

#22

ForcedTQ

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Quote:

Originally Posted by 00ChevyScott

would a higher or lower number (0.300 or 0.900) be going lean?

Narrow band sensors are typically only accurate from .400V (15.0:1 AFR) through .800V (14.2:1 AFR). So a numerically lower number equals a higher air to fuel ratio.

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05-05-2009, 09:56 PM

#23

built408

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Lower the number, leaner it is. Once you get around the leak, the o2's should go to 0 or close to it.

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05-06-2009, 01:18 AM

#24

ForcedTQ

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Quote:

Originally Posted by built408

Lower the number, leaner it is. Once you get around the leak, the o2's should go to 0 or close to it.

Yeah, that's what I just said two hours ago!

They'll go to 0, but that number isn't accurate to use for tuning!

Bust out the wideband!!

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05-06-2009, 09:28 AM

#25

00ChevyScott

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Quote:

Originally Posted by ForcedTQ

Yeah, that's what I just said two hours ago!

They'll go to 0, but that number isn't accurate to use for tuning!

Bust out the wideband!!

I'm not trying to tune it... I'm trying to find an air leak

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05-06-2009, 09:29 AM

#26

BlackGMC

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Quote:

Originally Posted by ForcedTQ

Yeah, that's what I just said two hours ago!

They'll go to 0, but that number isn't accurate to use for tuning!

Bust out the wideband!!

With the size of cam that he has IMO the wideband is useless at idle...

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05-06-2009, 12:04 PM

#27

BlackGMC

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He just left my house, it is idleing like a champ now!

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05-06-2009, 12:04 PM

#28

GMCtrk

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what was wrong?

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05-06-2009, 12:25 PM

#29

BlackGMC

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Quote:

Originally Posted by GMCtrk

what was wrong?

Decrease the Desired Airflow table, increased the idle areas on the MAF table, set the O2 switch points back to stock, increase the Startup Airflow Friction table, Decreased Startup Airflow Decay P/N and Gear, Increased Startup RPM Decay P/N and Gear, etc...

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