help on my 99 4runner
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help on my 99 4runner
can anyone help me with suggestion on getting more power out of my 4runner it feels like its running very weak with no power what so ever
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i'll get a can of Seaform just to let out the carbon deposit, then OEM sparks and wire set, air filter. you should have all these done in an hour. tranny, T-case, diff. fluids. next would be timing and valve adjustment.
since you are in Curlyfornia, the air/fuel sensor, commonly mistaken for an O2 sensor, sometimes can gone bad without throw a code. check it with a mulitimeter, there are tons of discussion about it.
since you are in Curlyfornia, the air/fuel sensor, commonly mistaken for an O2 sensor, sometimes can gone bad without throw a code. check it with a mulitimeter, there are tons of discussion about it.
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This is the best reply I have seen to question like this. I couldn't agree more with the Dr.'s prescription here. Keep us posted on what you do to fix your problem. It will help others that have the same issues.
can anyone help me with suggestion on getting more power out of my 4runner it feels like its running very weak with no power what so ever
i'll get a can of Seaform just to let out the carbon deposit, then OEM sparks and wire set, air filter. you should have all these done in an hour. tranny, T-case, diff. fluids. next would be timing and valve adjustment.
since you are in Curlyfornia, the air/fuel sensor, commonly mistaken for an O2 sensor, sometimes can gone bad without throw a code. check it with a mulitimeter, there are tons of discussion about it.
since you are in Curlyfornia, the air/fuel sensor, commonly mistaken for an O2 sensor, sometimes can gone bad without throw a code. check it with a mulitimeter, there are tons of discussion about it.
Last edited by Strap22; 06-27-2008 at 01:28 AM.
#9
umm, well you cannot check the proper function of an air fuel sensor with a multimeter. an o2 sensor maybe, air fuel, not at all. you need to hook up to the ecu with a computer (obd II) and monitor the waveform. all a good air fuel sensor will show you on a multimeter is a steady .65 or .66 volts no matter what it is actually reading, that is all. the air fuel -waveform- is calculated within the ecu. you need to get THAT reading, not the volts from the sensor itself.
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umm, well you cannot check the proper function of an air fuel sensor with a multimeter. an o2 sensor maybe, air fuel, not at all. you need to hook up to the ecu with a computer (obd II) and monitor the waveform. all a good air fuel sensor will show you on a multimeter is a steady .65 or .66 volts no matter what it is actually reading, that is all. the air fuel -waveform- is calculated within the ecu. you need to get THAT reading, not the volts from the sensor itself.
I am glad to see you know how to make a POINT using CAPS.
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Moved to Newbie Tech Section.
This topic has been discussed more times than most of us care to think about.
Basic things have already been listed:
-Complete tune-up (including fuel filter)
-Clean MAF (this is surprisingly effective and easy)
-Given that it's a Cali spec vehicle (I am assuming) it will have both an A/F and an O2 sensor (one before the cats and one aft) check them out the best you can with the tools you have (or buckle down and pay someone)
As long as she is mechanically sound, I would suggest doing the deckplate mod. Do a search for "3rd gen deckplate" and you will get more hits than you know what to do with.
The ISR mod is another good mod and is very easy. I opted for the Airaid MIT, as it is a cleaner look but also more $$. Do a search for "ISR mod" and "Airaid MIT" and see what you come up with.
I know with my '99, when my cat(s) starting going out it started running like crap, mileage dropped about 3-4mpg, idle was rough. Once I got that whole ordeal sorted out (search for "dual cat 4runner cali Fink") she was running like a champ again.
Somebody check me on my O2/AF sensor. I know I had two sensors and I know the one aft of the cats was an O2 given that I had to install a Rear O2 Sim from URD.
Good luck,
Fink
This topic has been discussed more times than most of us care to think about.
Basic things have already been listed:
-Complete tune-up (including fuel filter)
-Clean MAF (this is surprisingly effective and easy)
-Given that it's a Cali spec vehicle (I am assuming) it will have both an A/F and an O2 sensor (one before the cats and one aft) check them out the best you can with the tools you have (or buckle down and pay someone)
As long as she is mechanically sound, I would suggest doing the deckplate mod. Do a search for "3rd gen deckplate" and you will get more hits than you know what to do with.
The ISR mod is another good mod and is very easy. I opted for the Airaid MIT, as it is a cleaner look but also more $$. Do a search for "ISR mod" and "Airaid MIT" and see what you come up with.
I know with my '99, when my cat(s) starting going out it started running like crap, mileage dropped about 3-4mpg, idle was rough. Once I got that whole ordeal sorted out (search for "dual cat 4runner cali Fink") she was running like a champ again.
Somebody check me on my O2/AF sensor. I know I had two sensors and I know the one aft of the cats was an O2 given that I had to install a Rear O2 Sim from URD.
Good luck,
Fink
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thanks guys i did the maf cleaning process and throttle body cleaning to and it feel alittle bit better but i think i have to change the o2 sensor soon
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