280Vette

Seems like the #1 and #2 manifold bolt wasn't tightened down enough. Tightened it up even more, played with the idle screw and timing a bit and now it runs. Ran for 10 minutes straight with no issues. I have some fine tuning to do, but for now I'm just glad it runs. Now I think I have to replace the clutch slave and lines, I think they deteriorated from not being used, but that should be pretty quick and easy. Thank you guys so much for the help

It does idle now for the most part. Still sounds rough and stumbles and stutters and dies sometimes when I give it gas. I used a new intake/exhaust manifold gasket for the install. I also just noticed I do not have any clutch pressure. I don't know if it's related but the clutch was working fine before this all happened.

I did change the idle screw and now it'll run for about 30 seconds, and a lot healthier, so it is getting better. I can hear what sounds like a vacuum hiss when the engine is running so now I guess I just need to track the hiss down. Sounds like it's coming somewhere over the #1 and #2 injectors

Well I took a look at all of the hose routing (had to wait for it to stop raining) and the only thing I found was a small crack on the hose between the air flow meter and the throttle chamber. I fixed that and while it doe's seem like it'll try and idle a little bit longer, It still dies. I also noticed that some of the vacuum hoses don't quite look the same as the diagrams. But I compared the engine pics now, to a picture I took when I first bought the car (and it was running) and everything is hooked up the same. All my previous project cars have been carb'd, kind of missing that right now ha

Sorry, not alternator, one hose goes to the distributor.

Will I unhooked that line. It's connected to a t-coupling. One hose goes to the alternater the other to the throttle body. There's no vacuum coming from it so I'm assuming the end that was hooked up to the "sorry piece" needs to be hooked up to a vacuum source. I cannot find where it would go though. As for the PCV hose it looks okay, no cracks or anything http://i.imgur.com/42jf9YC.jpg

Well I checked the firing order, it's correct. I took a look at the vacuum hoses and everything seems to be hooked up. What do you mean by the vacuum line going to the throttle linkage dashpot?.

Alright so I've searched around and still cannot nail down the problem I'm having. I bought a 1976 280Z a few months back, ran and drove fine except for an exhaust leak at the manifold. I swapped the manifold for a header and ever since then it refuses to idle. The car will crank up and start, and it will stay running if you hold the gas and keep it in the upper rpms. But as soon as you let off the gas or try to let it idle it starts to stumble then shuts off. It almost sounds like its not running on all cylinders. Any idea what could be causing this? I've checked all of the fuel lines, filters, etc. It's not a smog motor and the only major things done to it are an A/C delete and a 5 speed from a 77Z Here's some pictures of the engine if that helps http://i.imgur.com/bqR4i7q.jpg http://i.imgur.com/5SejnLO.jpg http://i.imgur.com/WYkjXYu.jpg Thanks in advance, this has been driving me crazy