high pressure fuel leak

Porno Joe

Member
Oct 11, 2010
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South of Pittsburgh
LBZ with dual fuelers.

if i drive the truck normal or like a grandpa, everything is fine no issues whatsoever. if i get on it a little bit, when I get to my destination, i'll get a whiff of raw diesel. its most notable on the driver side. obviously thats also the side where the second CP3 is.

being that is only get the smell after stepping on the go pedal, im thinking its probably a leak only on the high pressure side- when pressure gets very high.

questions:

any obvious places to check? first i was thinking rail plug, but i think the dual cp3 kit eliminates that doesnt it?

second,- its been a long time since i messed with EFI live, but i remember correct, can you command a higher fuel pressure while sitting in the garage idling? is it ok for me to command 20k+ to check for leaks? seems dangerous lol.
 

darkness

Well-known member
Jul 15, 2009
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I would check for a drive pressure leak too. Even at moderate throttle, you should be commanding max fuel pressure. But it should be pretty easy to see if you have a fuel leak without going max pressure.
 
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Porno Joe

Member
Oct 11, 2010
513
0
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South of Pittsburgh
well i did have a hole in my downpipe and 1 up pipe, which i fixed back in december. so i do not think there is any leaks there.

honestly , the leak/smell happens so infrequently i sort of forgot about it, but recently i noticed it again which is making me want to start looking for it

been a minute since i was in efilive- probably 5+ years since i even turned my laptop on! so i'll def need to re-familiarize myself with it lol
 

2004LB7

Well-known member
Dec 15, 2010
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Scan tools, DVT tab, fuel pressure.

Will need to activate the DVT and then check the box for the control you want