1972 240z won't start - Nissan : Datsun ZCar forum :Nissan Z Forum: 240Z to 370Z
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post #1 of 7 (permalink) Old 10-23-2003, 09:32 PM Thread Starter
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1972 240z won't start

I bought this car about a month ago I have 2 280zx but this is the first 240 . It was not running when I got it and the engine seems to have been well taken care of. The problem is the distributor was taken apart it looks like they tried to replace it with electronic ignition. Anyway I replaced the distributor w/ the E12-80 moduel. It turns over has a good spark and is getting gas but will not start. I have the plugs set up at a 41 gap and wires set in the distributor cap like my 280zx 1,4,2,6,3,5. The air filter is off and the choke is not hooked up. I've tried spraying quick start in the carbs also but it would just cough it out. I am going to sell this car but would like to get it running before I do. Please help....Thanks

1979 280zx (sons first car)
1981 280zx parts car (free you hual)
1980 TR7 w/chevy 305 Project car
1980 TR7 parts car
2006 Subaru Legacy GT (wifes)
1997 Ford F150
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post #2 of 7 (permalink) Old 10-23-2003, 09:42 PM
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Re: 1972 240z won't start

1 - 5 - 3 - 6 - 2 - 4 ! Counterclock wise


Where are ya at ?



Post Edited (Oct 23, 5:48pm)

Z,
Kevin

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post #3 of 7 (permalink) Old 10-23-2003, 10:21 PM Thread Starter
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Re: 1972 240z won't start

Is one started at 10 o'clock? If so whats the dif. Thanks Washington state

1979 280zx (sons first car)
1981 280zx parts car (free you hual)
1980 TR7 w/chevy 305 Project car
1980 TR7 parts car
2006 Subaru Legacy GT (wifes)
1997 Ford F150
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post #4 of 7 (permalink) Old 10-23-2003, 10:28 PM
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Re: 1972 240z won't start

this is what I found using search ---firing order---

http://www.zcar.com/forums/search.ph...ct=1&fldbody=1

and

http://www.zcar.com/forums/read.php?...4#reply_408952


82 280zxt 4 spd auto-sold
73 240z--lsd
'79 620 KC
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post #5 of 7 (permalink) Old 10-24-2003, 02:27 AM
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Re: 1972 240z won't start

set engine at Top Dead Center and take the dizzy cap off. Make sure the rotor is at the #1 wire. happened to me before... someone messed up the order on the distributor.
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post #6 of 7 (permalink) Old 10-24-2003, 03:04 AM
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what are the compression readings?

if you meant the firing order by counting clockwise no biggie. mexlife is on to something. i think the #1 placement on the dizzy cap is different on a 240Z and a 280ZX. to avoid second guessing, set the engine on TDC on the compression stroke and see where your rotor's at.

when was the last time the engine ran? have you tried playing with the ignition timing?

prior to a purchase i always like to perform a dry and wet compression test to size up the engine.

Darrel you had to show my ugly drawing...LOL



Post Edited (Dec 9, 11:46pm)

...........
Kammy
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post #7 of 7 (permalink) Old 10-24-2003, 01:52 PM
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Re: 1972 240z won't start

Just got out of the same problem actually. Set #1 cylinder at TDC (#6 should also be at TDC), double check #1 cylinder intake and exhaust valves. They should be closed. Double check #6 intake and exhaust valves. #6 intake should just be opening and #6 exhaust should just be closing. Check distributor drive spindle - the half moon should be facing forward towards the radiator with the spindle at 11:25. When replacing the cap and rotor, see that it is right on #1 plug. Check the spark plug gap. If you're using an electronic distributor (Hitachi DH88 something,...can't remember the number exactly), the spark plug gap is .044 not .041. .041 will still make the engine fire but it won't be smooth and perfect. Replace the distributor cap and rotor with new ones. A hairline crack (sometimes not visible to the naked eye) with cause puttering, backfire and engine miss (been there, found that!). Double check continuity of all 7 high tension wires with a multimeter. Wiggle them around to ensure there are no intermittent readings or faltering current. The firing order that Kevin Taylor provided was the right one. If you have carbs, pre-adjust the throttle (not sure of the right term) adjusting nut below the carbs at 3 full turns (they have to be even), don't worry about the idle yet (just make sure it got some). Once the engine started and warmed up to normal, you can set the perfect timing with a timing light and then adjust idle and synch your carbs and throttle linkages.

Bing
1971 240Z
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