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I already passed the smog previously by replacing o2 sensor and cat from the previous 2 years ago. Now I need a new smog check and ran into these issue and need help again.

there isn't any coolant leaking so I thought I don't have to replace unless it is leaking? this should be done every 100k miles and I am only at 170k miles.

I haven't changed the spark plugs or wires. I think I brought the car used at around 135k miles and I am on 170k miles now. I haven't preformed a piston soak yet either. What would be the cost estimate from a mechanic for these things? a 95 Accord isn't worth much and the repairs might be more...

I need help again as my smog is due. I did the following before the smog test. Drove highway for 1 week to burn up build up, changed oil and filter, used Techron gas with Techron concentrate. Drove for 30 mins so cat was hot enough. I ended failing. Readings are: RPM 1857 15 mph car measured HC...

i changed oil, cleaned out the filter and used GTP, still didn't pass. how do i retard the distributor? I don't have tools.

I drove highway for 30 mins before my 2nd smog test, still failed.

I drove highway for 30 mins before my 2nd smog test, still failed.

I added 3 gal of e85 into a 1/4 tank. the 1/4 tank already had 87 gas in it. I added another tank of 87 gas. My ratio was 1:1 for each gas, 87 gas, and e85. After this, I was around half full. My gas tank maxes at 17 gallons.

Basically, warm up the car? I spent 1 hour driving to get the cat and engine hot before my test.

what is the correct ratio amount then? It supposed to 30% e-85 max? then rest a full tank of 87 gas?

I already had 87 gas around 3 gallons existing and added in 1 gallon of 87 to mix with 3 gallons of e-85. This would equal a 1:1 ratio, but I don't know why the NO went crazy.

I rested today with 3 gals of e85, 1 gal of 87 and failed due to NO gross polluter.

What do you mean by open loop?

i checked my cat exhaust after driving and it felt hot and saw dry, black soot. Would this be normal? Or related to my unburned fuel?

I've already Redline fuel system cleaner with a full tank of gas and used up all the gas. I added in CRC guaranteed to pass last week and I am almost done with this tank of gas too. Will a clean injector lower HC?

I was doing radiator repair so I didn't drive my car for 2 months. Would this cause high hydrocarbons? After this, I have driven 300 miles on Shell gas, mostly highways. Would this clear out my unburned fuel, and high hydrocarbons issue?

I changed my o2 sensor around 40k miles ago. it should be ok still?

Is this known as ethanol gas too? Since my engine is designed to take 87 would e85 damage my car? I am supposed to do the smog check with a full tank of e85?

My battery is new. only 1 year old. I cleaned my spark plugs with WD40 and it starts immediately with no stuggles.