New dizzy bit got a miss. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 07-22-2005, 01:03 AM

Ok i got the new pertronix dizzy in along with all new plug wires. I fire it up and I got a miss. Thinking I was 1 tooth off I put the timing light on it and its set to 8 degrees. I have checked my wires again and I have em all on the right place. Anyone run into this one?

Thanks

jhow66 · 07-22-2005, 01:08 AM

1-8-4-3-6-5-7-2---5 &7 not crossed? When does it miss--at idle-under load - all the time?

skokie · 07-22-2005, 01:13 AM

I am just running it at idle right now. Sitting at about 800-900 rpms.. 5 & 7 are not crossed from what I can see. I unplugged both and reran the plug wire.

tomatocity · 07-22-2005, 01:33 PM

check your distributor cap to see if the wires are connected in the proper sequence.

jhow66 · 07-22-2005, 09:57 AM

Dual exhaust? Check to see which side.Then which cylinder on that side.

cdowns · 07-22-2005, 10:17 AM

if it's a constant miss put your timing light on each plug wire till you find the one thats not firing// then try changing plugs between cylinders to see if it's a plug then switch wires to see if it's a bad wire

skokie · 07-22-2005, 11:19 AM

Cdowns I will try the timing light.

panhandler62 · 07-22-2005, 11:26 AM

When you find the dead puppy.. check the wire and the connectors at each end. Sometimes the distributer end boots don't fit perfect and the contact isn't made.

Tim240Z · 07-22-2005, 01:14 PM

Also check the free play on the dizzy, at the rotor. Sometimes they need to be shimmed at the intake to space the dizzy body up a little. If it needs shimming it could be forcing the rotor into the cap and pushing it cockeyed? Been there, done that.....took me ages to figure it out too!

matt67350 · 07-22-2005, 02:08 PM

Check the plug gap. It changes when you go to HEI.

skokie · 07-22-2005, 03:30 PM

plug gap is .45. Will check the free play. Will recheck the wires tonight.

skokie · 07-22-2005, 11:25 PM

I found it. I had 2 and 4 crossed at the dizzy. Running great now. Thanks for all the help. Cant believe I crossed those

07-22-2005, 01:03 AM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	New dizzy bit got a miss. Ok i got the new pertronix dizzy in along with all new plug wires. I fire it up and I got a miss. Thinking I was 1 tooth off I put the timing light on it and its set to 8 degrees. I have checked my wires again and I have em all on the right place. Anyone run into this one? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-22-2005, 01:08 AM	#2
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	1-8-4-3-6-5-7-2---5 &7 not crossed? When does it miss--at idle-under load - all the time? __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

07-22-2005, 01:13 AM	#3
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	I am just running it at idle right now. Sitting at about 800-900 rpms.. 5 & 7 are not crossed from what I can see. I unplugged both and reran the plug wire. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-22-2005, 01:33 PM	#4
tomatocity Registered User Join Date: Jun 2005 Location: Sacramento CA Posts: 1,255	check your distributor cap to see if the wires are connected in the proper sequence. __________________ Got bored, sold everthing. Got bored, looking for a 1960-66 C-10. Want to build my last truck.

07-22-2005, 09:57 AM	#5
jhow66 Registered User Join Date: Jun 2002 Location: Knoxville Tenn. Posts: 3,058	Dual exhaust? Check to see which side.Then which cylinder on that side. __________________ 56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer

07-22-2005, 10:17 AM	#6
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	if it's a constant miss put your timing light on each plug wire till you find the one thats not firing// then try changing plugs between cylinders to see if it's a plug then switch wires to see if it's a bad wire __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

07-22-2005, 11:19 AM	#7
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Cdowns I will try the timing light. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-22-2005, 11:26 AM	#8
panhandler62 Java Mechanic Join Date: Jun 2005 Location: Martinsburg, WV Posts: 6,763	When you find the dead puppy.. check the wire and the connectors at each end. Sometimes the distributer end boots don't fit perfect and the contact isn't made. __________________ Keith 11 Lincoln MKT -- Momma's wagon 13 G37xS -- middle age crazy car 68 C20 Fleetside -- RIP Decorating the whole town up at a cost of $27 ....

07-22-2005, 01:14 PM	#9
Tim240Z Senior Member Join Date: Jan 2005 Location: LAX area, So Cal Posts: 499	Also check the free play on the dizzy, at the rotor. Sometimes they need to be shimmed at the intake to space the dizzy body up a little. If it needs shimming it could be forcing the rotor into the cap and pushing it cockeyed? Been there, done that.....took me ages to figure it out too! __________________ 1972 Suburban C20 454/TH700R4, eaton-corporate 4.10 (looking for 3.7) Sold: 71 Cheyenne 20 Installed a 99 5.7L L31/4L60E from Suburban 1500 (2005)

07-22-2005, 02:08 PM	#10
matt67350 Registered User Join Date: May 2001 Location: Benbrook, TX Posts: 1,060	Check the plug gap. It changes when you go to HEI. __________________ 69 swb stepside, rebuild and upgrade in progress

07-22-2005, 03:30 PM	#11
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	plug gap is .45. Will check the free play. Will recheck the wires tonight. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

07-22-2005, 11:25 PM	#12
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	I found it. I had 2 and 4 crossed at the dizzy. Running great now. Thanks for all the help. Cant believe I crossed those __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234



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