stuck in pe
When I am on the throttle I go into pe or open loop. If i am only on it for brief min it will come out of open loop. However if I stay on at wot or a while the truck stays in open loop regardless of how fast, throttle position or just idle until I shut the truck off for a minute
I have tried working with my tunner guy and he is scratching his head. I have replaced the o2s and the mass is fine. I have long tubes with no cats. Cam intake and heads on a 2004 5.3 Silverado. I am at a loss. Has anyone dealt with this? What else can I look at? Map sensor? Thanks in advance |
Can you post the tune
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Unfortunately I cant. Bryan from pcm for less does it, I just monitor through torq. Sorry
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Can you see commanded AFR?
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No only o2s and ltfts
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What is the O2 voltage doing when it is stuck in PE?
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They goto 8.5 and the trims go to zero. Which is supposed to happen at wot but not after I back off
Thanks for helping btw |
8.5 or 850?
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dfco will null your o2 sensors to read 0 +- trims. And COT will also make you read 0 +- trims, which dumps alot more fuel to keep your cats cool which could last a good while if you said you were wot 'for a while'. How long is that? 1 minute at WOT?
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Could be a min or longer.
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