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wolf

wolf 12/26/2012

1996 Chevrolet Camaro RS 6 Cyl 3.80L

Engine

What's the best way to clean the cat converter on my 96 Chevy Camaro 3.8? So far no codes have popped up.

So far I've changed EGR valve, map sensor,ignition coils, ignition module, spark plus & wires, muffler,also had fuel injectors & fuel pump checked.When I first take off the car runs smooth until I get to 50 or 60 mph them it starts to hesitate, loose power before it eventually starts to level off.If I punch it, it'll get to about 40 mph before it starts to skip & hesitate.When in park and I rev the engine and hold it at about 4000 Rpm's it skips in & out.Someone suggested I drive around in 2nd gear for awhile also herd about pouring a gallon lacquer thinner in the tank.Don't want to have to sell the house to fix this thing, HELP!!!!

1 Answer


Jimm

Jimm 12/26/2012

Have you changed the fuel filter? If not, change the filter as first (or next) step. Bad idea to add anything to the fuel tank to 'clean out' the catalytic converter - this will only destroy the pellets and coating inside the converter housing.
Here is a list of items to check for the hesiation;

First step - have the check engine light or stored fault codes scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' for more assistance.

Possible Causes of Engine Hesitation or Stumble:

Dirty fuel injectors (cleaning the injectors often fixes this)
Dirty air filter (change filter)
Dirty / clogged fuel filter (change filter)
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires

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