0
If a 1993 Camry 4-cyl did not pass smog test reading 1400 for Nox when the max is 700 is the egr valve bad or is there more to fix?
Wiki User
∙ 8y ago
With NOx numbers this high, it says the EGR system isn't working correctly. At idle, the EGR is closed. At speeds, the EGR is open. See if you can move the EGR valve diaphragm by hand when the car is idling. The car should die or want to die. If it doesn't do this, it could be plugged up. Remove the EGR valve and clean any carbon deposits in the valve and also do the same on the engine side where the EGR is connected.
Also, to reduce your NOx emissions reading, replace your spark plugs, wires, distributor cap and rotor. Then, retard your timing as much as possible. This can be done by loosening the 10mm nut next to the distributor and turning it clockwise, then re-tighten the bolt.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
Why does a Toyota 1993 Camry smoke?
The valve seals most likely.
Where is the fan belt on a 1993 Toyota Camry station wagon?
Replace valve seal
Where is the break bleeder valve located on front breaks on a 1993 Camry?
You should be able to find it on the brake caliper.
What is code 21 for 1993 Camry?
what is a code 21 on 1993 Toyota Camry 4cyl
How do remove the glove box on a 1993 Camry?
how to remove glove box in 1993 camry
How do you fix a Valve cover gasket on a 1993 Toyota Camry 6-cylinder automatic?
Check to see it the valve cover bolts are torqued to specs. If this does not stop the leak, the gasket needs replacing.
What could be the cause hard to start 1993 Toyota Camry 4cylnder when engine cranks but often will not start?
Its old, google how to clean (ICV) idle control valve.
What is the oil capacity of a 1993 Camry with 3 L engine?
The engine oil capacity of a 1993 Toyota Camry V6 is 4.3 quarts.
Where is fuse box on 1993 Toyota Camry?
how do you check to know whether your coolant fan motor needs replacing in my 1993 toyota camry v6?
What are the timing marks for 1989 Toyota Camry?
timing marks 1993 yoyota Camry 2200
Is The 1993 Toyota Camry An OBD1 or OBD2?
OBD1
Will 20 inch tires fit on a 1993 Camry?
NO.
