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02-17-2013, 10:55 PM
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#1 |
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Registered User
Join Date: Oct 2008
Location: Colleyville, Texas
Posts: 57
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5.3 swap running bad hesitating PO174 code
My truck is a 72 with a 03 DBW motor and overdrive Transmission. I got my motor running in Oct. The exhaust was installed last week. Code Po174 System to lean bank 2 came up in Dec. while I was painting the cab and frontend. Today I installed a O2 sensor and the motor runs a lot better but the code came back on. The speedo is not working (New Classic Instrument Gages)and the truck hesitates bad under accel. The truck was back firing before the O2 sensor. The fuel pressure today was fluctuating between 45 55 today it was not steady. When you step on the gas pedal the truck does not accelerate then it jumps up to the speed.
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02-18-2013, 10:46 PM
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#2 |
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Registered User
Join Date: Jan 2007
Location: Topeka,KS
Posts: 778
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Re: 5.3 swap running bad hesitating PO174 code
What's the spec. on your fuel pressure? It seems to me the minimum was 60 or 65psi for the vortecs.
__________________
68' C20. 283CI w/55CC 305HO heads, NP435 Close Ratio, Corp. 14 bolt FF 3.21, 75' front end swap (everything but the X-member). |
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02-19-2013, 10:26 AM
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#3 |
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Registered User
Join Date: Oct 2008
Location: Colleyville, Texas
Posts: 57
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Re: 5.3 swap running bad hesitating PO174 code
I fixed it the O2 sensor was bad and the gas was getting bad. Seems to run pretty good now.
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