260Zed

Gday, I just wanna run this past everyone to make sure my thinking is correct. Cylinder No5 doesnt make a difference when i pull the spark lead. when i check the plug its wet with fuel. I've checked plugs and leads and dizzy rotor. When its chugging away on 5 and i spray carb cleaner around the intake the miss goes away. So ive got a manifold leak. This only appeared out of the blue, I just finished wiring a rx7 fuel pump. I tested the pump on the car ran great. Wired it up so as to stop when engine dies. Then after that I started her up i started to get the got problem. I'm SURE the pump isnt the cause. Manifold gasket is prolly only 4-5 months old (The exhaust place is like "nah get no problems with these gaskets" when enquired about it when i got extractors fitted) So can a manifold leak prevent the firing of the cylinder? Can it just sorta happen suddenly like that? Is a 75 260Z Dome top Su's, 280zx dizzy and coil, mild cam, extractors with 2.25 exhaust. As of 3 weeks ago compression was an even 150 on all cylinders with throttle open. Thanks for the opinions everyone Luke

Read most of the main post, I cant even imagine how pissed i would be if i got ripped half the cash that those guys did! :dead:

Wouldnt you rather replace the jute with something that doesnt absorb water/moisture. As far as I see that is what a lot of the z's floorpan rust is from, horsehair staying wet for long periods of time. You could use a closed cell foam (XLPE or EVA), which will not absorb or let any water pass thru it. Its not as easy to use as the material or jute but it is lighter and a similar price to the jute (in Oz anyway). But lets hope well keep the moisture out of the car in the first place. FWIW 260Zed

Alfadog, can i ask how u managed that? i just got quoted $360pa or so for fire and theft. Rating 5, no crash Suncorp Metway too,

Bore = 83.0 Stroke = 73.7