HEI , help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Alexis · 04-23-2003, 07:13 PM

i posted on the wrong board..

http://67-72chevytrucks.com/vboard/s...threadid=50049

Ok I got the timing setup dam near perfect. I changed out the module, and coil. And still not a pop or backfire??? I'm not getting spark.....what can be doing this. Is there something else on the HEI i need to replace? any help would be great. thanks. I am getting power through the coil.......

JimKshortstep4x4 · 04-23-2003, 08:25 PM

Have you tested the pickup coil yet? You can test it with an ohm meter and with the leads disconnected it should read somewhere around 800 ohms. There is not much else in the distributor.

Jim

mtdave2 · 04-23-2003, 08:56 PM

i always test an hei before i put it in a truck, just clip a wire from the bat, to the power terman. and one someplace on the shaft to a ground. stick a wire and one plug on the cap, ground the plug and give it a spin..... lots easier to do this when its out of the truck!

my bet is on the pickup coil as well..

supercheyenne · 04-23-2003, 09:41 PM

http://www.cybrrpartspro.com/Chilton...77CH02_10.HTML

give this page a look over my brotherfromanothermother.

Jackal2k9 · 04-23-2003, 09:56 PM

theres not much to an hei dist. gut it and redo all of it(wiring anyways)make sure you have clean points, and contacts on the top where the coil goes. That spring has to fit through the hole in the rubber grommet otherwise no sparky sparky. Also theres the plug that has the arm that wraps around to the screw for the coil. make sure theres no dielectric grease on taht stuff.

Alexis · 04-23-2003, 10:23 PM

i wish object from cars chould feel pain........it's reading at 810ohms...... any more ideas?

gr8scott51 · 04-23-2003, 11:18 PM

Mine had a bad wiring harness. One of the four wires was loose in the clip. Make sure they are all tight - oh yeah, don't plug the ignition wire on to the tach connection (embarrassing). Good luck, Scott

Blue Beard · 04-24-2003, 08:25 AM

supercheyenne...........good article at that site.

Should answer a lot of questions for people.

04-23-2003, 07:13 PM	#1
Alexis Member since 2000 Join Date: Dec 2000 Location: Mountain View Ca / Mexico Posts: 7,879	HEI , help i posted on the wrong board.. http://67-72chevytrucks.com/vboard/s...threadid=50049 Ok I got the timing setup dam near perfect. I changed out the module, and coil. And still not a pop or backfire??? I'm not getting spark.....what can be doing this. Is there something else on the HEI i need to replace? any help would be great. thanks. I am getting power through the coil.......

04-23-2003, 08:56 PM	#3
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,508	i always test an hei before i put it in a truck, just clip a wire from the bat, to the power terman. and one someplace on the shaft to a ground. stick a wire and one plug on the cap, ground the plug and give it a spin..... lots easier to do this when its out of the truck! my bet is on the pickup coil as well.. __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

04-23-2003, 11:18 PM	#7
gr8scott51 Registered User Join Date: Mar 2003 Location: Bremerton, WA Posts: 1,839	Mine had a bad wiring harness. One of the four wires was loose in the clip. Make sure they are all tight - oh yeah, don't plug the ignition wire on to the tach connection (embarrassing). Good luck, Scott __________________ Silence is golden, duct tape is silver. - Scott

04-24-2003, 08:25 AM	#8
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,834	supercheyenne...........good article at that site. Should answer a lot of questions for people. __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

04-23-2003, 08:25 PM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Have you tested the pickup coil yet? You can test it with an ohm meter and with the leads disconnected it should read somewhere around 800 ohms. There is not much else in the distributor. Jim

04-23-2003, 09:41 PM	#4
supercheyenne Registered User Join Date: Dec 1999 Location: Newton, KS, U.S.A. Posts: 1,142	http://www.cybrrpartspro.com/Chilton...77CH02_10.HTML give this page a look over my brotherfromanothermother.

04-23-2003, 09:56 PM	#5
Jackal2k9 Registered User Join Date: Apr 2002 Location: Katy, Texas Posts: 171	theres not much to an hei dist. gut it and redo all of it(wiring anyways)make sure you have clean points, and contacts on the top where the coil goes. That spring has to fit through the hole in the rubber grommet otherwise no sparky sparky. Also theres the plug that has the arm that wraps around to the screw for the coil. make sure theres no dielectric grease on taht stuff.

04-23-2003, 10:23 PM	#6
Alexis Member since 2000 Join Date: Dec 2000 Location: Mountain View Ca / Mexico Posts: 7,879	i wish object from cars chould feel pain........it's reading at 810ohms...... any more ideas?



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