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02-16-2014, 11:36 AM | #1 |
Registered User
Join Date: May 2013
Location: Mississippi
Posts: 501
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454 tbi won't idle when warmed up...
So I have been working at this for a while.
Problem is when truck is first started (cold) it runs fine, then when warmed up, and I let my foot off the gas pedal it dies. It will restart if I give it some gas ( press gas pedal just to be clear) while starting but then dies when I let off the pedal. When this started I was getting a code 44 lean exhaust so I replaced o2 sensor, fuel pressure regulator, fuel pump, and fuel filter, even a new gas tank and cap. And the problem remains. Prior to this I have replaced: erg valve, map sensor, coolant temp sensor, and cap,rotor,wires,plugs. Any ideas/suggestions?
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1987 R20 Suburban LQ4/4L80e swap: http://67-72chevytrucks.com/vboard/s...d.php?t=693824 |
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