lpguy

iTrader: (2)

A pressure leak in the gas tank wouldnt cause a lean condition would it?

TX Tahoe Z71

iTrader: (28)

I wouldn't imagine so, I'm pretty sure that's not how they work. A leak in the fuel line, maybe, but that would probably be a bigger concern than running lean if you have gas spraying out under your truck.

trever1t

iTrader: (14)

It will cause a code to be thrown...and in the Envoy the other day caused the engine to stall.....weird

white lightning SS

iTrader: (3)

pressure leak in the tank would lower fuel pressure, lean condition on accel, and would also would allow for pressure to bleed down and cause a long crank issue. These in-tank pump unit loose the pressure bleed back check valve in the pump all the time.

TX Tahoe Z71

iTrader: (28)

I learned something today. Gracias

budhayes3

iTrader: (19)

If you're gettin an EVAP code and you're worried that it will effect the way the engine runs, it will not. The fuel pump sock is submerged in fuel...if there was a leak in one of the lines, not only would it possibly run lean, but you'd have a big fuel leak to show for it. Having the PCM pick up a leak for the EVAP system is kind of like running with the gas cap off (which is often the case with evap codes lol).

white lightning SS

iTrader: (3)

If you have an evap code 9 out of ten times it the vent valve mounted between the cab and the box. The solenoid opens in these. I didn't know if you were having an evap code or a lean running condition.

lpguy

iTrader: (2)

im having lean and evap codes, i was just wondering if they were connected or just 2 seperate problems... its not my gas cap they checked that when i tryed getting inspected, i guess something didnt get tightened all the way when the walbro got replaced...

budhayes3

iTrader: (19)

Yea, I'll bet that they're both directly related to the Walbro replacement, check all of the lines and hoses, there may be a vacuum or fuel line leak somewhere...

DixieDevil

iTrader: (2)

check the middle line, after my walbro swap i got the same thing. there is a plastic t if you follow it, mine was snapped right at the t. just check all your lines... my .02