I'm at my absolute wits end- truck still overheating despite best efforts (4 Viewers)
- Thread starter NLXTACY
- Start date
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You do realize the newer 3 way heavy metal catalytic converters (only ones CA approved) actually run hotter than the old 2 way converters?
Without cats truck won't pass NOX sniffer.
My 01 Mustang GT passed the sniffer with home made "high flow" cats as mentioned above. But that was ~ 2006 and I'm sure machines are a little less forgiving in 2014.
Come to think of it, we had things called MIL eliminators installed on those cars. I wonder if there's such a thing to fool Toyota ECU?
Come to think of it, we had things called MIL eliminators installed on those cars. I wonder if there's such a thing to fool Toyota ECU?
How did you you determine you had bad cats? (Sorry didn't catch it)
NLXTACY
Wits' End
- Thread starter
- #833
#1 Temperatures out of exit of both cats are 100º+ COOLER than the intake of the cats.
#2 OS2 jumping wildly instead of being more of a constant number/range.
#3 Compared against neighbor's LX and their results were opposite of mine.
#4 Neighbor has under 100k and I have over 327k.
Jumping O2 sensor readings are a good thing. You should be seeing a range of .1 to 1.0 volt up and down in rapid oscillation with about a 300 millisecond response time. A lot of techs call it 'switching' and it's indicative of a properly functioning O2 sensor and/or ECM.
Yes this is true. The FSM actually tells you what the acceptable range of voltage fluctuation is for the sensors. This applies for BOTH sensors.
And this graphic better illustrates the voltage fluctuations which are good and not good
2KCruiser
Everything 2KRacing, practically live here
I used Magnaflow High Flow cats. They do last a while.
I have magnaflow hi flows and cant pass the Commirado rolling road dyno emissions test. Those cats are worthless for folks in strict emissions areas. Going to have to get the Magnaflow oem replacement cats, they make a CARB legal version too.
On a side note you need to check the back pressure of the exhaust to determine truly what is going on. I would hope there are some specs in the fsm for this procedure.
On a side note you need to check the back pressure of the exhaust to determine truly what is going on. I would hope there are some specs in the fsm for this procedure.
