Edmunds Answers



  • julesp 02/17/09 4:14 pm PST

    Check the air filter and report if you have a check engine light. The year of your vehicle is important.

    Source: Julesp

  • robcanaz 02/17/09 4:35 pm PST

    Ok yes that is the other thing I forgot to mention...DUH...99 rx300 95,000 mi, The check engine light has been on since before our 70,000 mi tune up. The computer said it was one of the O2 sensors, we replaced the one it said, but still the light came on. We replaced the other O2 sensor thinking that would solve the problem, but it didn’t, our mechanic couldn’t find the problem so we live with it on. When it started to sputter the other day the check engine light was flashing.

  • julesp 02/17/09 4:52 pm PST

    One is in the fuel tank which is the fuel pump strainer and the other is in the engine compartment. Just follow the line on down from the fuel rail right to it.Change this one first, check the fuel pressure to see if it runs better. The HO2S circuit wiring may need to be checked for open circuits if there is no activity on an OBDII scanner. Check the codes before you do any of this. You may have a new surprise. Good fortune. P.S. Still change the filter.

    Source: Julesp

  • karjunkie 02/17/09 4:58 pm PST

    To do it, you have to remove the driver's side rear seat and there is an access hole, but I can tell you that from the instructions alone, this is a major PITA. If I were you, I would check the fuel pressure at the rail first and see if it is the fuel pump going bad, as the fuel filter on this vehicle is not normally replaced as part of normal maintenance. To replace the filter or the pump, take out the back seat and fold the rear section of the carpet forward. On the driver's side floor is a round metal cover with a wire harness running through. Pry off the cover (it it glued on) to reveal the pump top. Remove the wire connector. Carefully remove the orange snap-lock from the fuel line, then pry the fuel line up and off. Remove the bolts and flange holding the pump in place, then pry the pump loose and lift straight up and out. The filter is on the pump. Obviously, be very careful to depressurize the fuel system and keep any spark or flame far far away! Good luck!

  • robcanaz 02/17/09 5:33 pm PST

    Yea Thanks for all your help. I am a definately not the man for this job. Anyone know a good mechanic.


Top Fuel System Experts View More

Rank Leader Points
1. MrShift@Edmunds 3860
2. zaken1 3315
3. karjunkie 3165
4. 0patience 690
5. Stever@Edmunds 545
6. docj 525
7. texases 500