White smoke from exhaust tail pipe

[Laujpha]

I recently fail smog with my 93 240sx for gross polluted. My s13 have alot of white smoke coming from the exhaust tail pipe. i decided to change head gasket, valve seal, fuel filter, o2 sensor, new spark plug, air fliter, clean my egr, intake gasket, header gasket, valve cover gasket, new water pump, new termostat, new tps,clean my iacv, ect.. pretty much the whole head gasket set kit.. with that being said...i still have white smoke and car smell like its burnig to much gas...did compression test and all cylinder have 155 psi...any suggestions and help i would really appreciate it.

[brndck]

do a leakdown test, have your injectors tested to make sure they aren't leaking. A leaky injector o-ring can cause a rich condition as well, but a new set of injector O-rings is cheap, and easy to install

[Laujpha]

Thanks bro...i will replace the o ring and will update.

[EDT007]

Running rich would usually produce a black smoke, not white. Did you get the head decked before putting it back on the new headgasket? White smoke would lean to me think it's more coolant related then gas. How are the plugs? If it's gas related they should be fuel soaked.

[Laujpha]

I didnt decked the head b4 puting back in...for some reason im having overheating as well..no mixtures of coolant and oil..all the plug is correct...

[KAT-PWR]

Injector o rings

[EDT007]

O-Rings with an overheating issue? Doubtful, seems like it point more towards a coolant/HG issue. Possibly issue on the block side. You can pickup some UV dye from Autozone that pours into your coolant. Once it runs through you can use the UV light around the block as well as oil and see if you see any traces.

[brndck]

I didnt decked the head b4 puting back in...for some reason im having overheating as well..no mixtures of coolant and oil..all the plug is correct...

if you're still overheating after doing the head job, you either still have air in the cooling system that needs to be bled out

or

your head is warped and NEEDS to be decked, possibly the block too

[Laujpha]

It was not overheating b4 i did my headgasket, but it was having alot of white smoke so i decided to do a basic tune up like changing valve seal n headgasket alone with whatever come in the kit. Still didnt fix the white smoke.

[KAT-PWR]

Check injector o rings

Unbolt fuel rail set on paper towel
Key on
Watch it piss fuel everywhere

[Laujpha]

I just order in my injector o ring..will update once i replace it. Btw, My car idle find at 750 rpm and sound really good.

Thanks everyone in advance ...everything here is really helpful and i really appreciate all the good advice. .