Failed smog again
#1
Junior Member
Thread Starter
Failed smog again
I need some help here. 91 350 has failed smog a few times now. I am at a loss for what could be wrong as the car seems to run fine. This latest time it failed was for high HC. Does anyone know of a good shop in the Chino Hills area that could look into this?
Thanks
Steve
Thanks
Steve
#2
Supreme Member
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Location: Moorpark, CA
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Car: '91 GTA, '92 T/A Convertible
Engine: GTA: 350 w/Vortec heads, T/A: 305
Transmission: Pro-built 700R4
Axle/Gears: GTA: 3.27, T/A: 2.73
Re: Failed smog again
HC is unburnt fuel, IIRC. Start with the simple stuff like your timing. How long has it been since you changed your plugs, wires, rotor, and cap?
#3
Junior Member
Thread Starter
Re: Failed smog again
so i have about 270,000 on the original motor. It first failed smog back in 2013 and since then I have not even put on another 2000 miles. In that time, i have replaced the distributor along with cap and rotor, map sensor, new fuel injectors, fuel pressure regulator, fuel pump and plugs. the cats have about 3000 miles on them. other than the engine just being worn out i just don't know what to do with it anymore. The engine feels like its running fine
#5
Junior Member
Thread Starter
Re: Failed smog again
I did replace the smog pump recently and all 3 of the valves that go with it. How can I test if the pump is working correctly?
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#8
Senior Member
Re: Failed smog again
What injectors and fpr did you put in the car? Im close in ontario and can look at it for ya.