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hood vents

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Yep. That's how I did warm starts in my 810 when the check valve was bad until I fixed it.

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It starts fine when cold and starts fine if its warm and sits for longer than say 30 mins. Also if I just turn it off and back on when warm it starts fine.

I've tried the on and off ignition before and it didn't seem to help. But I will try it again next time I think i'm going to have startup issues.

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I've asked a mechanic that works on a lot of Z's and says that its Vapor Lock and hood vents would help.
It sounds like he just wants you to spend some money at his shop. I've had a number of "tech" guys tell me to bring my 280Z to their shop and they'll tune up my engine, and even add an extra 50 HP by upgrading the chip in my engine computer!:mad::devious:

I still don't think you can get vapor lock in a fuel-injected engine, unless you do a number of bad things to it.

And after Googling 'air lock' all I get is stuff related to the engine's cooling system.

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It sounds like he just wants you to spend some money at his shop. I've had a number of "tech" guys tell me to bring my 280Z to their shop and they'll tune up my engine, and even add an extra 50 HP by upgrading the chip in my engine computer!:mad::devious:

I still don't think you can get vapor lock in a fuel-injected engine, unless you do a number of bad things to it.

And after Googling 'air lock' all I get is stuff related to the engine's cooling system.

I wouldn't doubt it. But this guy was pretty cool and definately Z knowledgable. Hell he had about 30 Z's from 70-90s at his shop. He seemed like the kinda guy that was pretty much a come to me when you get desperate and not just after more work. I was just stopping by for parts. I had to get out of there before I went broke!!

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I drove the Z for a while today and stopped at the post office for about 10 minutes and decided to try the ignition on and off to see if that would help with the stuttering problem and it didn't seem to help at all. I'm still thinking i'm getting "Vapor Lock" on my EFI system. But what the hell do I know!!

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those vents are actually open. my friend modified one and gave it a scoop look. sweet!
Which vents? 77-78? Note what year mine is. I know they're open. My question was about the various different ZX vents.

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I wouldn't doubt it. But this guy was pretty cool and definately Z knowledgable. Hell he had about 30 Z's from 70-90s at his shop. He seemed like the kinda guy that was pretty much a come to me when you get desperate and not just after more work. I was just stopping by for parts. I had to get out of there before I went broke!!

Which guy & shop? I know of 2 shops here in Houston, one I would highly recommend, while the other I would highly condemn! :eek:

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Which guy & shop? I know of 2 shops here in Houston, one I would highly recommend, while the other I would highly condemn! :eek:

The guy I went to is in Cypress. I think his shop's name is Reliable Dependable Auto something or other. He also goes by ZWorld. He has a website. Its Znzx.com

Which shops are you talking about?

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The guy I went to is in Cypress. I think his shop's name is Reliable Dependable Auto something or other. He also goes by ZWorld. He has a website. Its Znzx.com

Which shops are you talking about?

The one I'd recommed is Awesome Z. Doug is a Certified Nissan Master Technician with over 30 yrs experience. http://www.awesomez.org/index.html

The one you listed is the other shop I had in mind. :sick:

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I have what seems like to be a vapor lock issue with my 75 280z. I'm not sure what it is exactly. But i've read many thoughts on this issue and being a newb at S30 i'm pretty confused.

If I drive for 30 mins or more and then stop my car and let it sit for 10-15 minutes it will sputter real bad for a little while. I've read about Vapor Lock, Cold Start Valve, Thermotime switch... I've asked a mechanic that works on a lot of Z's and says that its Vapor Lock and hood vents would help.

Try disconnecting the EGR valve. It worked for me.

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Try disconnecting the EGR valve. It worked for me.
If you were having a problem with your car and disconnecting the EGR valve 'fixed' it then, technically speaking, you still have a problem. Does your car pass smog?

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If you were having a problem with your car and disconnecting the EGR valve 'fixed' it then, technically speaking, you still have a problem. Does your car pass smog?

hehe.....that is another story.

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Well, you know we (Cali) have to pass the "evap test' now also.

right...I am er, um....working on that. I'll leave it at that for now.

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The one I'd recommed is Awesome Z. Doug is a Certified Nissan Master Technician with over 30 yrs experience. http://www.awesomez.org/index.html

The one you listed is the other shop I had in mind. :sick:

I'll second moonpup's assessment of Awesome Z. I've had no dealings with the other shop, but can vouch for Doug.

Frank

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Try disconnecting the EGR valve. It worked for me.

I don't have an EGR valve. I think hood vents would fix my problem. (Just trying to get the thread back on track) haha!

I definately need to go see Awesome Z. Nice to know their are a couple places in town to turn to for help.

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I don't have an EGR valve. I think hood vents would fix my problem. (Just trying to get the thread back on track) haha!

I definately need to go see Awesome Z. Nice to know their are a couple places in town to turn to for help.

ahhh, my mistake. I guess those only came on CA cars?

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ahhh, my mistake. I guess those only came on CA cars?

iirc 77-78 came with EGR's regardless of which state they were in (my 78 has it, but no cat since it wasn't required in AZ)

the older Z's though only had them if they were in Cali i think.

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Which vents? 77-78? Note what year mine is. I know they're open. My question was about the various different ZX vents.

They're functional.

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I personally think that Nissan was just trying to add something different to their last go rouund of the S30. JMO. Look how fancy they got with hood vents on the ZXs. Are those things even open? Sorry Zx people, but I really don't know.

To answer your question Stephen, yes they are open. The early version (as on my car) of the vents seem to simply allow the heat from the engine to dissipate quicker when stationary. I would imagine (but have no way of testing) that they also help with air circulation while driving (only makes sense, that). The later version vents (originally on the turbo cars only, later on all s130 cars) seems more functional at speed. The left hand vent seems designed to pull air down into the bay, and aims this fresh air directly at the J pipe and intake manifold. The vent is in two parts-the "triangular" part, and the trapezoid.

Both sides of the ZXT hood have this rather large (and ugly-IMO) trapezoid, and it is obviously meant to get as much hot air out as possible.

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