Got a new to me 2001 Vx (see 2001 in Florida... under vehicles for sale). Picked it up from a dealer in FL to drive to Austin, TX. Around a hundred miles into the return trip I started having trouble.The Vehicross started bucking severely under acceleration and I eventually got an engine code for low voltage on two O2 sensors. I first found some loose battery connections and reseated/tightened those but that just cleared the engine codes temporarily and the bucking under acceleration came back. Limping into Bradenton, FL for the night, I went to a Pep Boys there on Saturday. They found low pressure in the fuel line (30 (psi?) versus the recommended 50+) and replaced the fuel pump. On Sunday I was able to make it back to Austin, but it was painful.
Unfortunately I'm still having a few issues and I need help identifying the culprit:
1) After about an hour of driving the vehicle starts bucking again (thinking maybe there is a vacuum getting formed in the fuel line?) My temporary solution is to gas up every hour or so. This was tedious on a 20+ hour trip but for the hour after filling up the vx ran great.,
2) My fuel gauge is all over the place. Perhaps this is related to #1, or perhaps the sending unit on the fuel pump also needs to be replaced?
Thanks for your help!
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