Replaced fuel pump, now DTC P0442

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02-09-2009, 06:14 PM

c5ce

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Replaced fuel pump, now DTC P0442

I replaced the fuel pump in my 99 Blazer and with ina few miles I got the DTC P0442, Evaporative Emission (EVAP) System Small Leak Detected.

Can anyone help me narrow down where to look for the problem?

02-09-2009, 10:19 PM

WolfPack

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Location: Raleigh, NC

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RE: Replaced fuel pump, now DTC P0442

Did you crack the tank?

02-10-2009, 04:55 AM

c5ce

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Join Date: Dec 2008

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Posts: 34

RE: Replaced fuel pump, now DTC P0442

I sure hope not! [sm=smiley36.gif]

Seriously, I dont think so. I think its some little something that I'm over looking.

02-10-2009, 06:36 AM

swartlkk

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Location: Waterloo, NY

Posts: 41,137

RE: Replaced fuel pump, now DTC P0442

Did you clean the top of the tank where the fuel pump seals really well? Did you use the new o-ring and completely remove the old? Did you get every vacuum line, hose, etc connected properly? Did you crack the roll-over valve (typical)?