chaseincats

Got mine today and while you can pop it on so that it fits tightly to the valve cover, screwing it fully down isn’t possible…

Just bought it, thanks for the reminder

Yeah, the hose clamps. I changed the original clamps to a more modern style gates/belt clamp because you can get more clampage out of them

Update: I took the entire vapor system apart and pressure tested each hose and the vapor tank by blowing into one inlet and capping the others with my hands; didn't taste great. The result was finding all of the hoses and the tank hold air perfectly. I put everything back together and when blowing from the front could still smell gas in the back. I threw caution to the wind and cranked the belt clamps down to within an inch of their life and problem solved - no fumes. Crank those clamps down boys and girls - case closed

This is perfect, thanks @Zed Head!

unfortunately it looks like there wasn't a tuneup chapter in the manual at all for an ZX year according to the table of contents. how are people going through a tuneup on these cars?

Hey gang, I will be working on a friend's 1981 280zx over the weekend but after looking at a few FSMs for 208zxs (on nicoclub & xenonzcar) they don't seem to have the ET Engine Tuneup chapter that comes in my 1978 FSM. I know they're both L28 engines but are the tolerances, valve lash values, etc identical? Is there a different manual specifically that has the tuneup specs for the ZX cars or should I use the 1978 manual's ET chapter?

Have you tried the tapered lugs like I tried? They fixed my shake.

I don't think PSI especially that minor change would affect much outside of making flat spots on your tires more noticeable (do you have any?). The FSM I believe says your car should be sitting at 28 psi.

Whoa! You’d adapt it by just capping off the other diaphragm right?

yikes what a nightmare

Just out of curiosity, how do you end up getting the hood up with a broken cable?

The line should be fine since I could blow through it when it tested everything. Also in the past I was able to blow through it and have gas fumes be ejected into the cabin so that portion should be good (unless it is only somewhat blocked). The exhaust problem was finally fixed with a shop vac and a friend holding a halloween fog machine near the back. Wherever smoke came in, was handled. A huge culprit was the new taillight gaskets. Those should be glued/siliconed to the car, as-is bolting them on does next to nothing. I called and sassed thezstore a tidbit for that not being on their site haha

Got it - just wish there was a part number or at least an exact year for it. Regarding the gas smell, I took apart everything (and I mean everything) vapor related in the back of that car and pressure tested every single hose including the one to the fuel tank by putting my fingers in the outlets, putting my face up to the inlet, and blowing mightily. Not a great experience. Everything seemed to hold air, so I put everything back together, pushed all the hoses on VERY hard, cranked the hose clamps VERY hard, and blew in the carbon canister hardline VERY hard too. So far, unlike before, now gas smell escaped in the back (besides the gas cap of course) which is a new experience. My guess is these hoses are old (which they are) and needed some extra persuasion from the clamps. We'll see if this continues to be the case. Regarding the vapor tank. I was thinking about bypassing it like this which I believe should work. Getting a T-fitting and plugging one end into the metal tank line, one end into the top of the carbon canister's outlet (the one shown when you pull the vacuum cap off) and plugging the third into the ported vacuum part of the throttlebody. That is in theory what is happening with the design despite the bespoke line going into the intake manifold. I'll give the above a shot if the gas smell returns to the back of the car.

That was the issue - I'm assuming a carbon canister vacuum cap from 95 won't hold vacuum either

I'm sure installing it isn't all that difficult - I just had a hell of a time finding a new one...

Ah that topic - I believe it was from a mid-90s pathfinder too

Do you know how long ago that thread was? That might be tough to find

Right, so why wouldn't plugging the metal tank line into the ported line that goes into the throttlebody work?

I'm trying to eliminate all gas smell both in and outside the cabin

Doesn't having the carbon canister connected properly create a semi-vacuum leak? The seal is indeed bad in the vacuum portion of the canister.

I shouldn't be able to smell the gas vapors if it is the tank though since it is isolated from the cabin I'd think. One of my hoses has to have a rip somewhere but I can't find it. The frustrating part is the only time I can smell it is when I'm driving or if I blow hard in the charcoal canister metal line...

Sorry, I should have said the top vacuum operated portion no longer holds vacuum. Would wiring it that way work?

This hit me today. Why not plug the metal line in the engine bay that comes from the vapor tank into the t-connector that the carbon canister's vacuum actuator outlet ordinarily would plug into? The vapors would still be going into the intake manifold, just through a different opening. Since I can't find the gasoline smell location from the vapor tank area, getting the vapor tank venting system working is the next best thing but since my carbon canister doesn't hold vacuum, that's how I came to this.

Removing that stuff out of principal or due to it not being used with the old engine?