EBPV and hissss???
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Laughing Gas
Joined: Feb 2007
Posts: 775
Likes: 0
From: Williamston, MI
EBPV and hissss???
My truck has a constant hiss when driving. I can let off slightly and it goes away. I've been searching for a while now and thinking it's EBPV. Found to check the IAT and oil temp sensor (thanks kwik and Alan).
Anyone have part numbers or is there a way to test these? Anything else I can check? Is it doing damage or can I turn up the music and get to it after this weekends 400 mile trip?
Anyone have part numbers or is there a way to test these? Anything else I can check? Is it doing damage or can I turn up the music and get to it after this weekends 400 mile trip?
Post Fiend
Joined: Jun 2006
Posts: 5,497
Likes: 7
From: Central, Al
An EOT sensor signal that is detected out of range (high or low) by the PCM will cause the PCM to ignore the EOT sensor signal and assume an engine oil temperature of -20°C (-4°F) for starting and a temperature of 100°C (212°F) for engine-running conditions. The CHECK ENGINE light will also be illuminated as long as the condition exists.
CONNECTOR CHECKS TO GROUND (B-) (CHECK WITH SENSOR CONNECTOR DISCONNECTED AND IGNITION KEY OFF, ALL ACCESSORIES OFF) Test Points Spec. Comments
Grey/Red Stripe <5 ohms Resistance to ground. If greater than 5 ohms the harness is open
Light Green/Red Stripe >5 ohms Resistance less than 5 ohms indicates a short to ground
CONNECTOR VOLTAGE CHECKS (CHECK WITH SENSOR CONNECTOR DISCONNECTED AND IGNITION KEY ON
Test Points Spec. Comments
Grey/Red Stripe 0-.25 volts If greater than.25 volts signal wire is shorted to VREF or battery
Light Green/Red Stripe 4.6-4.9 volts Pull up voltage, if no or low voltage circuit has open or high resistance
CONNECTOR CHECKS TO GROUND (B-) (CHECK WITH SENSOR CONNECTOR DISCONNECTED AND IGNITION KEY OFF, ALL ACCESSORIES OFF) Test Points Spec. Comments
Grey/Red Stripe <5 ohms Resistance to ground. If greater than 5 ohms the harness is open
Light Green/Red Stripe >5 ohms Resistance less than 5 ohms indicates a short to ground
CONNECTOR VOLTAGE CHECKS (CHECK WITH SENSOR CONNECTOR DISCONNECTED AND IGNITION KEY ON
Test Points Spec. Comments
Grey/Red Stripe 0-.25 volts If greater than.25 volts signal wire is shorted to VREF or battery
Light Green/Red Stripe 4.6-4.9 volts Pull up voltage, if no or low voltage circuit has open or high resistance
Thread Starter
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Laughing Gas
Joined: Feb 2007
Posts: 775
Likes: 0
From: Williamston, MI
I'm not getting a check engine light nor am I feeling like I'm losing any power. It started (or at least I could hear it) when I did the 6637. After that final whooosh into overdrive it just never stops the hissss until I let up just a little bit. Boost seems to be about average from what I've read. I'll test the specs listed above this weekend. Thanks so much.
Lead Driver
Joined: Jan 2006
Posts: 7,308
Likes: 250
From: Hartford, WI
