ahickman

Is it throwing any codes? If you are having the problem only when accelerating it might be related to open loop operation by the ECM. Check your O2 sensor.

David_mx70

im just going to drop the tank and clean it out with superdegreaser, it evaporates quickly and cleans gunk and built up grease really well, it shouldnt hurt anything. but make sure to remove the sensors and fuel pump before just to be safe.

mattaway

mine has flashed a code maybe 3 sperate times, but only when it gets really bad, and it's only done it offroad.

i've been wanting to replace the o2, but it's $80. i guess i need to get used to not driving a chevy. the o2 in my s10 was $20!

David_mx70

ive only seen my check engine light once, i replaced the o2 sensor and the temp sensor (the temp sensor is in line with the o2, so if the temp sensor is bad the 02 wont read correctly) neither have helped

David_mx70

if you have a voltmeter and a chilton maitenence manual they show a procedure you can go through to check if your o2 sensor is still good. also when i pulled the temp sensor it was corroded and helped increase my milage but didnt fix the sluggishness...

ahickman

What codes did it throw? Not sure what you mean when you say your O2 and temp sensors are in-line. I don't recall them being physically wired together. In fact, the ECM pinout shows each having a separate lead.

abecedarian

uh... it flashed the CEL... and just by what you said, you don't know what the code was. Just because it's running poorly you think it's the O2?
What were the CODES (yes plural, cause I think you have more than one) from the ECU? Either that or you've already pulled the codes and it said O2 rich/lean and you automagically thought that the O2 was bad?

The temp sensor (whether for the gauge or ECU) is NOT inline with the O2 and neither will cause the other to read bad.
Check your wiring diagrams

David_mx70

im just quoting what three mechanics told me. i went to my toyota dealer and even their mech told me if im having trouble with the o2 i need to change the temp sensor at the same time, thats why i said they are "in line" i dont know why i would have to change both but thats what they told me.

mattaway

i never pulled the codes. i wanted to change the o2 for maintance reasons mainly.

ahickman

Did they tell you what code(s) were thrown by the ECU?

sven_angler_25

i had the same problem and it turned out to be the TPS. $105 but it made all the difference in the world!