8
questions

My 1996 lexus lx450 shows knock sensor code PO 330 PO 325. I have had this vehicle at several shops including lexus however they can't determine the problem. Vehicle had couple minor air leaks which I fixed. Engine works perfect, however engine light is still on. Any suggestions?

No power to fuel system whole from fuel pump to distributor

Diagnostic computer says cannot ocommunicate with car

M

But comes back on after 2 or 3 engine cranks.

The ECU was checked and is working properly. Where do I look next?
Thanks

my car begins a major vibration, accompanied by power loss, after 15 min driving at 65 mph. Pull off freeway and drive on surface streets, problem disappears. Tires/balancing ok, shocks replaced, tuneup done, brakes and rotors checked.

What else?

I have a P0401 code up solid. I have changed the EGR valve and modulator. I suspect the EGR temperature sensor is bad, but I do not want to spend $175 to find out. Can I measure the detector with a Meter to see if it is bad? What should I expect to see if it is still working? "

I have failed my emissions now 4 times. 1st time battery was dead from sitting, replaced battery then check engine light came on it failed stating needed to wait for computer to reset & to drive for 2 weeks. Went back 2 weeks later it failed stating O2 censor, replaced it went back then it stated the computer needed to reset again,. drove it for 2 weeks now its showing the lower O2 Censor... What the hell? What do I do?Why is this showing up now?