Question about 1998 Toyota Camry

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Toyota Camry - 1998 3.0 L V6 = Failed emissions - High HC ppm at 40KM/h. 105 reading (limit is 57) What would be some of the causes for such a high reading?

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Burning oil...Engine miss. lazy o2 sensor.. dirty maf sensor. check the data on a scanner and this will tell what is amiss.

Posted on Jul 13, 2009

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Posted on Jan 02, 2017

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What makes my HC and No (PPM) read so high on my emissions test


hi.
there are any number of things that could cause this, most of which need a computer diagnostic test to find and remedy.

the most common cause is also the simplest and cheapest to fix.
a dirty air filter will cause HC and NO readings to be high.
change the air filter, even if it looks clean. it is a cheap part and easy to install.
unless you have changed the filter in the last couple of months, do this first and take the car on a 40-50 mile run to clear the engine. then have the emissions checked again.

if this doesn't work then you will probably need a computer diagnostic test to identify the problem area.

hope this helps

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1991 olds Cutlass Ciera. 3.3l, failed the NO emission test. Results: HC ppm 12 .......limit 62 CO % 0.09 ..... limit 0.35 NO ppm 948 ..... limit 700 Before testing changed plugs, wires,PCV,oil. Also had...


Since your cat was replaced you should be looking at fuel problems...even gas cap seal....check fuel pressure,fuel regulator,and evap system.>canister or purge solinoid,o2 senser...high nox is caused by the cat or fuel problems on these engines...high pressure in the combustion chamber...lean condition>air leak on hoses,or high compression caused by carbon build up ...there is no EGR on this car so don't waste time looking for it...hope this points you to your problem

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have you had the the engine codes pulled and reset?
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we cure your trouble that caused your engine light to come on and you will pass your test.
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