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DISLEXICDIME

firing order for 720 with z24

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so i thought my plug wires where mixed up so i re arraigned my plug wires according to a diagram i found. and now it will not start i have tried many plug wire combo,s but no luck. please help i want to drive my truck lol

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Google helps :D If I remember correctly, some distributors will tell you what plug is what on the cap. Break out your magnifying glass though.

 

 

Warning: this diagram is in error.

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75D4505.jpg

 

Google helps :D If I remember correctly, some distributors will tell you what plug is what on the cap. Break out your magnifying glass though.

 

thats the diagram that maid me think my wires where wrong now it will not start :angry:

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Nothing to say someone hasn't reoriented the distributor. Did you get it 180 out? #1 on exhaust stroke, not intake stroke? Don't forget those distributors should be at -3 degrees/+3 degrees to operate correctly.

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so is there a working free on line fsm i cant find one i am pretty sure the timing and plugs are right. i am starting to wonder if the fuel pump relay went out. when i turn the key on there is no power at the pump.

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75D4505.jpg

 

Google helps :D If I remember correctly, some distributors will tell you what plug is what on the cap. Break out your magnifying glass though.

 

 

This diagram is fucked up totally. The cap has intake side and exhaust side wires. Look at or near 9 oclock as viewed from the driver's side fender the #1 intake plug should be closest to the rad, This would be Intake one going counter clockwise they are

Exhaust two

Intake three

Exhaust one

Intake four

Exhaust three

Intake two

Exhaust four

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Posted Today, 12:57 PM

 

when i put the pulley at zero should the rotor be pointing at 1intak plug or 1 exhaust plug

 

it should be pointing at both of them at the same time always

 

example

 

intake 1 exhaust 1

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This is how the dizzy should look if you are leaning on the driver's fender looking down on it. In the center are two coil wire terminals. The top most one has a square with an In inside it the bottom one has a circle with Ex inside it. The square one is for the intake plugs and just above my finger at 9 o'clock is a square that says I1 (intake one) Down at 4 o'clock is my thumb and just ahead of it is a circle with E1 (exhaust one) in it. The rotor is reallt two rotors in one conducting both intake and exhaust coil outputs. If you look closely there are an inner 4 terminals and an outer 4. Inner are intake, outer are exhaust.

 

If you set to TDC the rotor terminals should be pointing to 9 and 4 o'clock to fire both intake and exhaust #1 plugs.

 

721ignition002Large.jpg

 

 

going counter clockwise from 9 o'clock, they are

 

Intake one (finger)

Exhaust two

Intake three

Exhaust one (thumb)

Intake four

Exhaust three

Intake two

Exhaust four

 

.

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Ok so one more question what direction should the vac advance be pointing ? Front of the truck reaR of the truck hood or towards the ground?

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Hahaha hee hee hee................. (noob mistake)

 

 

.... ah just kiddin'. It's always something we can't see.

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i like the pickup. i forgot how cluttery the engine compartment was... first things first, weber w/out emmisionsbiggrin.gif

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Basically the rotor would be pointing in the wrong direction compared to where it should if the motor is a tdc on the engine....

Also if it's something your checking it needs to be checked at tdc of compression stroke.... if your not on the compression stroke that will also make it seem off 180

Does that make sense?

Why do you ask?

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If you are 180 out you can just swap the wires around 180 on the cap.  Move all wires two positions left or right.... done.

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The piston comes up and goes down twice for every time the cam and distributor turns once, 180 out means that it fires/sparks the spark plug on the wrong time the piston comes up to the top, the engine will not run this way and it usually back fires out the carb.

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Piston number 1 should be at the top, hence TDC at compression stroke, you can see this if you look inside the spark plug hole w a flashlight or feel air when you put your finger and piston comes up, or put a stick and see it when it moves up. Also there's this tdc finder that screws in the #1 spark plug hole and when you turn the crank bolt, it will stop cuz the tdc finder stopped it, then ur diet. Rotor should point to #1 spark plug.

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I know this post is old but what does it mean when a distributor is 180 out?

To answer your question specifically, a complete circle consists of 360 degrees, right? The rotor in the distributor, which distributes the spark to each plug (or pair of plugs, in the case of the Z2400) is driven by the camshaft, via a gear. This gear has to be precisely oriented when it is inserted into the hole it rotates in in order to make the correct plug(s) fire at precisely the right time as the pistons go up and down in the cylinders. "180 out" means the distributor drove gear is exactly one half of a rotation out of phase, which means the plugs will fire at the end of the exhaust stroke instead of the end of the compression stroke.

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It's turned by the crank shaft. I'm pretty sure you meant that.

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