Please help with some idle stuff!
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From: Tupelo,Ms
Please help with some idle stuff!
ok today i finally got tired of hearing the clicking at idle so at school i pulled the valve cover on driver side. all the rockers were tightened down... so i cranked it without valve covers and no tinging it sounded RIGHT well i can still hear a little bit but not much as this morning. also a guy in the other class that lives down the road said here latley it has been sounding sick 
so i gotta get it goin good. anyway i made my exhaust backpressure tube outa brake line and the old fittings bent good without creases!!! it was the same size line... so i got home and it was fluctuating idle from 600 to 700 and thats how it idled when i got home... i took the diablo tune off and it idled back to normal. BUT when i pulled codes i got the same two 1. exhaust backpressure sensor... and 2. high input exhaust backpressure.. i KNOW FOR A FACT that my sensor is bad cause its cracked so would a bad sensor still throw a code for TOO MUCH BACKPRESSURE??? Thanks for the help guys
so i gotta get it goin good. anyway i made my exhaust backpressure tube outa brake line and the old fittings bent good without creases!!! it was the same size line... so i got home and it was fluctuating idle from 600 to 700 and thats how it idled when i got home... i took the diablo tune off and it idled back to normal. BUT when i pulled codes i got the same two 1. exhaust backpressure sensor... and 2. high input exhaust backpressure.. i KNOW FOR A FACT that my sensor is bad cause its cracked so would a bad sensor still throw a code for TOO MUCH BACKPRESSURE??? Thanks for the help guys
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Joined: Aug 2006
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From: Mountaintop, PA
replace the sensor and be done with it.
You've got it backwards. High input is an error in signal feed from the sensor meaning there is an electrical malfunction with the sensor. It does not mean there is a too much backpressure.
You've got it backwards. High input is an error in signal feed from the sensor meaning there is an electrical malfunction with the sensor. It does not mean there is a too much backpressure.
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Joined: Aug 2006
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From: Mountaintop, PA
yeah, it can set code for a broken signal. Also sends signal to PCM constantly updating what backpressure it is seeing. Pcm alters fueling based on what backpressure it is seeing. Dp tuner needs it working properly its programing to work.
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From: Tupelo,Ms
well i may just leave that diablo off for awhile and would a sensor "fooler" work if the sensor is bad to begin with?
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Post Fiend
Joined: Jun 2004
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From: Parker, CO
One thing to note, you need to disable the EBPV or gut it, otherwise it won't know when to open up during the winter time. Found out that the hard way once.
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From: Mountaintop, PA
Yeah, DFuser makes two of them. You could run them. Makes the truck think the circuit is complete, clears all codes. I have one on my truck. It is the better one to choose from. I like it. Bought it when I went to a EBPV delete pedistal, even know I didnt need it.
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