e-350 V10 "too lean" rough idle

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Dec 12, 2009 | 04:56 PM

keolson123

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e-350 V10 "too lean" rough idle

I ran diag. and found two codes both saying "too lean". It idles rough and stutters at take off. Check engine is on. Haven't checked mileage, but I'm sure it's worse.

Dec 12, 2009 | 05:42 PM

Tom

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From: Isanti, MN

Which model year? How many miles?

Are you showing a P0171/174? If so, it's likely a dirty MAF sensor.

OBD-II Trouble Code: P0174 System Too Lean (Bank 2)

Dec 12, 2009 | 07:47 PM

bill11012

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Joined: May 2009

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From: Texas

Surging at Idle?

I had 171 and 174 with surging at idle, It was rotten vacuum lines.

Dec 12, 2009 | 07:58 PM

57fomoco

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From: Las Vegas, Nevada

I've seen it usually turn out to be the vacuum line from the PVC to the back of the intake going bad. It makes a T and multiple bends and it can get real soft and gooey. it connects near the idle air controller at the back of the intake manifold. I know that there are a few designs depending on the year and level of emissions installed. The local dealers always seem to have them in stock.

Dec 12, 2009 | 08:17 PM

Monster-4

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From: Millersburg, OH

Quote:

Originally Posted by 57fomoco

+1. If you get a lean code for both banks like that it's usually a vacuum leak and the most common place is the T connection on the PCV line up near the TB.