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Hey, I have a 2005 honda civic, prior to the issue I was driving the whole day with no problems, I get to a red light and the car turns off and doesnt start. Putting foot on throttle the car started up but letting go of throttle killed it again. After that I could not get the car to start unless throttle was open.

I changed the IACV, spark plugs, air filter housing as i noticed some vacuum leaks with a smoke machine near the throttle, other than that I dont think I saw any other vacuum leaks. I have done a compression test and its 150-160 throughout. Exhaust emissions smell way worst than before but it isnt coolant smoke. Its almost like sputtering, if i hold throttle and let it fight, it eventually idles at lower than 500rpm. Sometimes it dies again after being warm enough.

I took out the O2 sensor and cleaned it out with a cleaner. No codes on the car except misfires now. Any suggestions would be great. I have a video up as well.
(i dont believe its blue smoke, i did have the flash on)

 
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if you have misfiring, could be also a fuel problem. did you check fuel pump and filter?

 
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I havent checked the fuel filter, i actually cannot figure out if this model civic has one acccessible. I will be doing a fuel pressure test to see if that shows less than it should.

 
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it is with the pump inside gas tank

 
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yea, you got it bro. i didnt know either till i watched a youtube video about it. also in the process, check o-ring seals and a switch mounted in it.

 
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I have an 05 Honda civic, I'm not sure where my previous post went, so I'm sorry for double posting.

I replaced spark plugs, ignition coils, pressure tester cylinders is 160+ on all 4, I cleaned the throttle, I changed the iacv, I just did timing because I had a water pump leaking so I replaced those two, (car shut off before any of this was changed) o2 sensor was cleaned, fuel pressure is 40+ while priming and 40+ while cranking. Honestly I don't know what to do at this point, air intake was replaced. I'm losing it lol


Thanks

 
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same here bro and no one answer to help us

 
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Yeah brother, nothing to do, I took off my air intake manifold and didn't see carbon build up my last guess was the cat. I suggest you change that

 
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how much we are talking about?

 
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Aftermarket iac? They're typically junk

 
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Someone here said it's better get one from a junkyard.