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Chris, Shop Foreman
Category: Dodge
Satisfied Customers: 13562
Experience:  Dodge/Cummins and Chrysler Certified Master Tech
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My 1992 dodge ram charger won't pass emissions because of gh

Customer Question

My 1992 dodge ram charger won't pass emissions because of high hydro carbon any suggestions ?
Submitted: 1 year ago.
Category: Dodge
Expert:  Chris replied 1 year ago.

Hello and welcome to just answer. Are the CO and NOX readings within limits? And what are the actual HC readings?


Customer: replied 1 year ago.
The co and NOX readings are within limits the HC readings are 2.65 first time and 2.77 second time thru test needs to be 2.50.
Expert:  Chris replied 1 year ago.

Ok, High Hc is caused by misfires or incomplete combustion. A weak catalytic converter can also cause high HC. Perform a tune up (spark plugs, wires, cap and rotor) then run a bottle of Sea Foam injector cleaner through the tank at the next fill up. Hopefully this will help. If not, then suspect the catalytic converter and have it replaced.

I hope that this information is helpful and please let me know if you need further assistance.


Expert:  Chris replied 1 year ago.

Hello, just checking back to see if you received my last reply, and if so do you still need help with your problem? Please remember, the website will not automatically credit me from your deposit or subscription without your Rating! Please, use the Rating System Box and Rate our Q&A session today or. If you need to ask more questions, please feel free to ask!

Thank you!


Customer: replied 1 year ago.
I had ran a can of 44k in a tank of gas then filled with premium for the second test and the # ***** up. I'm going to replace plugs and change oil try again
Expert:  Chris replied 1 year ago.

Ok, keep me posted. If the hc still is too high, then consider replacing the catalytic converter.