ignition question, confused really - The 1947 - Present Chevrolet & GMC Truck Message Board Network

tonyscustomrides · 12-18-2009, 08:39 PM

so on my 81 c10, the idle has always been rough since i bought it. it shakes and smells like its burning really rich. so today i bought the idle adjustment tool for the quadra-jet carb, and i started to mess with it. no luck, so next thing, i checked the timing, the timing mark was behind the marker about an inch and half. Then i noticed the distributor was was really angled towards the front of the truck (the plug in on the left side faced very far forward) so i compared it to my 77 chevy and its almost parallel with the firewall. So then i checked the position of each spark plug wire on the distributor cap, and they are all back (clockwise) one position. so number one cylinder is actually on number 8. so i moved them all to the correct position, rotated the distributor to the correct location and the engine doesnt even crank over, so i moved them back to how it was and it runs, but has the rough idle and when you rotate the distributor to get it in the correct spot, it totaley dies.is any of this normal for the wires to be plugged in like that and that much rotation on the distributor? does this mean the engine is pretty worn out and someone messed with the timing like that so it would run? sorry for the long question.

rigon4 · 12-18-2009, 09:13 PM

Sounds like some one pulled the dizzy out and put it back in a tooth or two off. Pull all the plugs out of motor put turn the motor to top dead center on #1 cylinder (front driver side cylinder) check were rotor is at if not at #1 pull dizzy and move to #1. you will have to play with oil pump drive to get it to fall back in were you want it but the problem will be fixed

GMC Guy · 12-18-2009, 10:31 PM

Quote:

Originally Posted by rigon4

Sounds like some one pulled the dizzy out and put it back in a tooth or two off. Pull all the plugs out of motor put turn the motor to top dead center on #1 cylinder (front driver side cylinder) check were rotor is at if not at #1 pull dizzy and move to #1. you will have to play with oil pump drive to get it to fall back in were you want it but the problem will be fixed

x2

you'll want to re-adjust your carb after you get the timing dialed in

12-18-2009, 09:13 PM	#2
rigon4 Registered User Join Date: Mar 2006 Location: east syracuse ny Posts: 371	Re: ignition question, confused really Sounds like some one pulled the dizzy out and put it back in a tooth or two off. Pull all the plugs out of motor put turn the motor to top dead center on #1 cylinder (front driver side cylinder) check were rotor is at if not at #1 pull dizzy and move to #1. you will have to play with oil pump drive to get it to fall back in were you want it but the problem will be fixed __________________ 1981 K-5 Blazer 2wd 1985 C-10 Short step 1988 C-10 Suburban

12-18-2009, 08:39 PM	#1
tonyscustomrides Registered User Join Date: Sep 2009 Location: Ferndale, WA Posts: 36	ignition question, confused really so on my 81 c10, the idle has always been rough since i bought it. it shakes and smells like its burning really rich. so today i bought the idle adjustment tool for the quadra-jet carb, and i started to mess with it. no luck, so next thing, i checked the timing, the timing mark was behind the marker about an inch and half. Then i noticed the distributor was was really angled towards the front of the truck (the plug in on the left side faced very far forward) so i compared it to my 77 chevy and its almost parallel with the firewall. So then i checked the position of each spark plug wire on the distributor cap, and they are all back (clockwise) one position. so number one cylinder is actually on number 8. so i moved them all to the correct position, rotated the distributor to the correct location and the engine doesnt even crank over, so i moved them back to how it was and it runs, but has the rough idle and when you rotate the distributor to get it in the correct spot, it totaley dies.is any of this normal for the wires to be plugged in like that and that much rotation on the distributor? does this mean the engine is pretty worn out and someone messed with the timing like that so it would run? sorry for the long question. __________________ 77 chevy k10 Bonanza-Restored when i was 17 76 chevy c10 short box-scrapped 81 chevy c10 silverado short box-project 64 impala 2 dr hard top-project waiting to get started



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