I live in California and I just bought a 94 Yota 2 wheel drive 22RE motor. It failed the emissions aspect of the smog test and I don't know why. Everything else passed. The mechanic recommended that I get a tune up; new wires, spark plugs, oil change, and an engine flush. However, this all has been done except for the engine flush. It's only been about 1500 miles since the tune up. The motor has about 200,000 miles. Here is where it failed;

25 MPH HC (PPM) max-60 ave-22 meas-72

Therefore, I barely failed by 12. I don't know of anything that is causing the truck to fail. Any tips or suggestions?

 

the emission aspect has to do with the fuel, u have a small air leak somewhere , At least thats what it was on my old honda i used to have, the guy was a buddy of mine and he said the emission has to do with the fuel pressure not up to spec, which could be a leak.

 

Actually the evap test is for the fuel. The fuel cell, tank, lines are good. No leaks. So theres nothing wrong with the fuel. It's something else.

 

find a smog place that will do the whole test in 2nd.

Thats how they got mine to pass and even then it was really close

 

i thought my honda didnt have a leak either intill a friend of mine did some test and found towards the top where the filler cap is there was a safty pin size hole. Screwed a screw through it, took it back in and it past no problem.

 

but 2nd gear is where it failed.

 

but 2nd gear is where it failed.

 

get your oil changed and run 93 or whatever is the highest octane you can find. Your oil gets gas in it over time and can sometimes push a truck over the edge if it was barely gonna pass. Also make sure you drive the living piss outta the truck before you take it to the smog place. Nice long freeway full throttle pulls helps clean up the top of the pistons and gets the cat so it burns off all the junk in it. I would tell them it failed last time and see if they can drive the **** outta it before they smog it. good luck

 

Thanks everyone for your suggestions. And living in Cali will be forever. I think imma clean my injectors, check all sensors, and try that seafoam as well as an oil change then drive it for awhile before the test. More suggestions if anyone has more. Also if it doesn't pass I found somone that will do it for $90

 

Has anyone tried Seafoam?