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scionking
scionking, Toyota Expert
Category: Toyota
Satisfied Customers: 469
Experience:  5 YRS EXP. ASE MASTER CERTIFIED/ TOYOTA MASTER CERTIFIED
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I have a 1995 Tacoma 2.7l 4wd. the computer was giving me a

Customer Question

i have a 1995 Tacoma 2.7l 4wd. the computer was giving me a 420 code. so far I've replaced the cat, o2 sensors and gave it a fresh tune up. nothing has changed. it still runs rough, gas mileage is terrible and power loss is noticeable. no vacuum leaks either. I'm at the end my rope and my wallet is empty. I don't know what else to do. somebody PLEASE help.
Submitted: 2 years ago.
Category: Toyota
Expert:  scionking replied 2 years ago.

What brand are the oxygen sensors and the Cat

Expert:  scionking replied 2 years ago.

Are they Toyota or Denso brand?

Customer: replied 2 years ago.
not Toyota brand, not sure what brand.
Expert:  scionking replied 2 years ago.

In my experience oxygen sensors other than Denso are not good for Toyota's, at all. I've had some really weird things happen with sensors like Bosch.

Customer: replied 2 years ago.
I'll check them out.
Expert:  scionking replied 2 years ago.

OK, you can probably get away with an aftermarket Cat, but they don't last nearly as long as the Toyota brand, hence they cost more.

Customer: replied 2 years ago.
I had the cat installed this morning at an exhaust shop, don't know what brand that is. I tuned it up myself this afternoon with quality plugs wires cap and rotor.
Expert:  scionking replied 2 years ago.

How about brand of O2 sensor? This is critical when dealing with P0420 code.

Customer: replied 2 years ago.
Thank you for your time, i'm done.
Expert:  scionking replied 2 years ago.

Were you able to resolve your issue? Do you require more assistance?

Expert:  scionking replied 2 years ago.

Please accept my answers, so I can receive credit for my time.

Expert:  scionking replied 2 years ago.

Please accept and rate my service!!

Expert:  scionking replied 2 years ago.

Please rate my service!!