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Wire position for 75 Chevy 350 HEI on the

Distributor wiring position for 75 Chevy 350 HEI

Posted by dannypnm on

  • Anonymous May 11, 2010

    plug wires or the dist. wiring connections? firing order is on the intake if it is stock piston numbers are there to bye the valve cover look close, if is wiring, the red wire goes to the bat connection on the cap

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Richard Scordino

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  • Chevrolet Master
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Order is 18436572. Put the timing mark on the crank at 0 and the rotor should be pointing either to the firewall or the front of the engine. If at the wall, turn the crank one more time and it is now pointing at the #1 wire position on the distributor.
left side cylinders are 1357 right, 2468 wire order is in the direction the rotor turns when cranking.

Posted on Apr 15, 2010

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1 Answer

Chevy 350 firing order diagrams


1-8-4-3-6-5-7-2

TDC on #1 compression stroke,not exhaust

Number 1 on the dist cap-- is at about 7 o clock,
as you face the motor from the front

2-4-6-8
1-3-5-7

1&2 are at the front-- as you face it

Sep 14, 2013 | Cars & Trucks

1 Answer

I have a 1985 Chevy 350 with an ac delco hei distributor and i have the plug wires crossed up somewhere. I need a diagram to show the correct plug wire placement please. Thanks


This should do it.
You can also do an internet search for a standard 350 Chevy engine.
The firing order is 1-8-4-3-6-5-7-2
The order is the same for engines from the mid 1990s back to the late 1970s.

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Jan 16, 2013 | Cars & Trucks

1 Answer

Wiring for a small block 350


need to know if its a HEI cap and rotor or not. HEI caps have the coil built into them , an all in one ignition as compared to a external cylindrical coil.
you need to know that. either the distributor cap is a huge hurken thing (HEI) or it has an external coil somewhere or the cap has a ninth distributor hole in the middle of the cap to put a coil. wire.
after you figure out which one it is then you have to either go to www.autozone.com and study chevy wiring or buy a haynes manual for the similar vintage engine. for the external coil I would try a chilton manual for a chev truck before 1972. for HEI anytime thereafter. I may be off by a few years on the age of the engine. but hopefully you got an idea of what to do, or just google chev engine wiring? and study away.
good luck

jm

Jul 27, 2010 | 1980 Chevrolet Corvette

1 Answer

Two wires go from distributor (350 chevy) to HEI module, 1 is green the other white witch 1 hooks to ''N'' & witch 1 hooks to ''P'' on module?


the heaver guage wire will be a power lead, the other if cheched while crancking will be a ecm pulsation for coil

Feb 10, 2010 | 2000 Chevrolet 3500

2 Answers

Chevy 350 no spark I have changed the coil, cap, and rotor. Still no spark. I also changed the plugs and wires about 3 months ago


Check the distributor module (ICM), it may have gone bad and needs to be replaced. It's around $40.00 and it's under the rotor in the distributor assembly. Check the red lead wire to the HEI for voltage, there should be 12 volts. It common for the ICM to fail on the HEI system and if you go to Auto Zone, they can give you the step by step instructions to replace the ICM. Good luck and keep me posted, be glad to help.

Jun 11, 2009 | 1989 Chevrolet C1500

1 Answer

350 chev timing


What exactly are you working on. Are you wanting to know how to install a HEI distributor into a 1970's or 1980's small block chevy? Just wondering, it says 2007 cobalt?

May 15, 2009 | 2007 Chevrolet Cobalt Coupe

2 Answers

HEI Coil is burning out


If the Electrical system is grounding out, particularly the hot lead to the coil. then you will fry coils. Check your Positive leads at the fuse box for continuity to ground. 1st check the ignition wire i.e. red wire going to your coil. Disconnect the ignition wire from the coil or distributor (depending where your coil is located). If it has continuity to ground, then go to your fuse box and pull out all your fuses and test each terminal for continuity to ground until you find which circuit is grounding out and polluting the rest of the positive circuitry. If it is only the ignition hot wire then you know that is where the problem is. If it is coming into the fuse block from another positive source, isolate that source by not allowing it to come into contact with + current.

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