alright, i think this is a common problem, but i want to know if there is a way to make it better, every morning evening afternoon and night, not matter what temp. it is outside, my car will not just start right up, by the 6th turn of the key, with a little gas, it will start going and i will have to warm her up, is it common for 6 times to turn the key, and is there a way to solve this problem, kinda embarrassing in front of my GF's parents house....and i hope my zx isnt jealous...

Check all the hoses to & from the air regulator. The turbo out "j-pipe" has a tube that goes to the air regulator, if that gets kinked, it idles crappy when cold. Also check all your vacuum lines. There is no cold start valve on the turbo, just the air regulator. So start w/ that.

If you drive the car til it warms up and then shut it down for a few minutes and then try to start it up again does it give you problems? If it does then it's probably not the air regulator. If it doesn't give you problems at that point then it's most likely the air regulator or one of its lines as Nismo said.

alrighty, ill check all that stuff tonight, im putting some brand new 20w-50 engine oil and new K&N oil filter, along with some 85w-90 gear oil for the tranny, it will be a stress free night, for a change....

Holy good gawd... Why such a high weight?

I run 5W-20 in my 250K+ motor with no issues! It doesn't get much thinner than that. 20W-50 is just too thick. It's robbing prescious horsepower from you. Now, when it get's into the summer months I usually move up to a slightly thicker oil, but never more than 10W-30. The only reason to run thicker is if you have leaks or bypassing... which means you need to fix something.

Rod.

P.S. The Air Regulator thing sounds like it's on the right track... check that out.

Same here, never higher than 10W-30. Those heavy weight motor oils are designed for engines with large clearances and what not. Heavier weight does NOT equal better lubrication or protection. If your clearances were large enough to justify that kind of weight then your motor is pretty beat and needs a rebuild. Use the lightest weight you can without risking damage to your engine. Rods recommendations for weight are spot on with how I run my oil.

REALLY?? i figured i would get prepared for driving on the freeway everyday, and since the weather is heating up, i dont know, im just afraid of that thing overheating. i drive about 15-20 miles (highspeed) on the freeway. could it really hurt the engine with that weight?? because i checked the vehicle temperature from the factory service manual, and it fits the exact temperatures i will have to endure, especially with the spring coming, and the summer on the way. still recommend switching to a lighter weight?

of course during the winter, i switch it back to at most a 10w30

on the note of starting the car up, once i changed the gear oil and the engine oil, now it takes at most 2 turns of the key, and when warm, normally starts right up!

Oil Pressure Switch Faulty??

huh....could be, how much do you think those run, or how can i check that?

Attached is a copy of what the Haynes manual says.... Kinda leaves it open to the driver to decide, as the range from 20F - 100F is 10W-30 up to 20W-50.

$47 at CourtesyParts.com.
http://www.courtesyparts.com/Merchan...ode=25070-Z312

You could get one cheaper than that at AutoZone I imagine.

The heavy weight wont harm your engine but it will rob you of power and possibly even fuel economy. The thickness of it makes the engine work harder to turn. This doesn't induce stress on the engine but it does slow it down. I typically run 10W-30 year around except when I was living in South Dakota where I would use a lighter weight during the winter months cause it got REALLY cold there. I've never put anything heavier than a 10W-30 in gasoline engine car. If you've already purchased the heavy oil then no big deal. Go ahead and use it. But for future reference you should really use a lighter weight than that.

Oil is not what it used to be back in the early 80's. It's a lot better and can withstand a lot more than it used too. Dont go by the manufacture recommendation from over 20 years ago. Times change