Question about 1996 Toyota Avalon
Before first test replaced catalytic convertor changed oil and cleaned plugs not of that much wear fairly new 11000 miles or so and car barely passed emissions but it did pass however was failed due to self test system not completed cycled pulled code was egr insufficient flow tested all that i could within reason my first time on an egr system problem boy what a tempermental system toyota has indeed cleaned complete egr valve intake manifold plenum throttle body etc. to new condition removed all carbon deposit/soot replaced air filter and put in 91 octane gas 2nd time failed at 15 mph test slightly high hydrocarbons mil activated paid 90.00 hooked it to a dyno supposedly? bad egr modulator oem replacement it did in fact have a tiny whole in diaphragm ran self drive test no mil from this point on failed again at 15 mph test cycle even slightly higher hydrocarbons than previously tested nitrogen oxides have declined to 0000 carbon monoxides steady o2 increased a little dont know if that means anything on the o2 all tests on 25 and idle passed and it passed the first time only **** mil messed it up for a fail result to begin with very frustrating am replacing oxygen sensors although there is no code prevalent nor pending ran some garaunteed to pass cleaner threw a tank of gas and going for oem plugs but not wires at this time i am running out of money i am also going to fill up with 87 octane rather than 91 this time i dont understand the more i do the worse it gets it is so close and car runs like a champ runs fast and jumps high a real trooper my dad 1 owner highway miles of 217000 total any advise encouragement direction experience GREATLY APPRECIATED thanks to all for your replies
Have you tried Engine decarbonizing type foam to remove the excess carbon for the engine?
Posted on May 13, 2014
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Posted on Jan 02, 2017
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