1991 Toyota Camry "causes high smog test" Questions

...shaking during high rpms caused smog machine to abort smog test. he said excessive shaking in rear. dont shake while driving. what could be causing this motor mount might be bad or unblanced

...causes too high HC in smog test???? High HC means moisture in the system. Try driving it longer then take it to the smog shop. Otherwise it could be hard like a head gasket or easy such as a PCV not ...

...smog check done and guy said shaking caused machine to abort test at high rpms he said the rear shakes excessively at high rpms. i never have problems while driving. what could cause this? Out of ...

...the egr valve replace.make sure the vacuum hoses connect to egr valve and pvc replace.change air filter.all those things will cause high emission if not working properly.cause you to fail smog

...SMOG BECAUSE OF HIGH NOX VALUES. WE FAILED THE SMOG TEST BECAUSE OF HIGH NOX. HAS NEVER FAILED BEFORE. 1993 CHEVY SUBURBAN 1500 4X4. COMPLETELY STOCK. WHAT SHOULD I CHECK FIRST. nox is from running ...

...high on smog test? i was told to check vacuum lines, dont really understand what acronyms are on diagram need pics of where all vacuum and smog hoses are supposed to go Usually a high NOx reading on ...

smog test. the NO rates are high but all of the other tests pass without issue. What is causing this problem and how do I fix it. Thanks NOX is produced when cylinder temperatures exceed 2500 deg. The

...smog test due to "high emission", it also does not have the check engine light on or give any obd codes. What could be the problem? Robert, High emissions usually mean the EGR valve and several hoses ...

...causes for such a high reading and what is most likely the problem? cap and rotor, plug wires, PCV, ERG ????? And how would or could I check for each....???? I'm sorry, I'm not any good on ...

...smog test looks like the engine is miss firing, that could cause the timing to be out of whack also, try a old fashioned tune up, new spark plugs, wires, and filters also replace the PCV valve. any ...