Changed Plugs Now No Start ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

54blackhornet · 08-02-2015, 11:47 AM

I swapped in a set of plugs on my 71 C-20, 307 now it won't start ? It was running crappy and the plugs where pretty fouled. It has gas at carb but it just won't fire, it tries too start but won't ? Crazy because it's bone stock and has been reliable for years. Any suggestions ?

**FirstOwner69** · 08-02-2015, 12:15 PM

Plug wires connected to wrong plug(s)? Trace wires from the distributor. Check and double check. How old are the wires?

9teen69 · 08-02-2015, 12:46 PM

Quote:

Originally Posted by firstowner69

plug wires connected to wrong plug(s)? Trace wires from the distributor. Check and double check. How old are the wires?

x2

hugger6933 · 08-02-2015, 01:20 PM

Make sure the coil wire didn't get bumped. Jim

Redline novdog · 08-02-2015, 06:17 PM

Electrical things can go at any time.Got spark? if not coil? Points Condenser in distributor, knocked a wire off the coil/plug wires on wrong? Sorry for the long list but in my years I've been/done all of them.Just changing plugs didn't do that.something went away out of your control.

**D.PASSMORE** · 08-03-2015, 09:40 AM

Pull the coil wire from the distributer and lay it on top of the cap above the hole. Have someone turn the engine over. You should see and hear the ark going into the distributer cap. That will tell you if you have fire. If you have fire there, then check for ark at the plugs. If you have it there, then check the fuel supply. Remember, you have to have fire and gas to make the engine run.

08-02-2015, 11:47 AM	#1
54blackhornet Registered User Join Date: Jul 2008 Location: Eastern Oregon Posts: 2,301	Changed Plugs Now No Start ? I swapped in a set of plugs on my 71 C-20, 307 now it won't start ? It was running crappy and the plugs where pretty fouled. It has gas at carb but it just won't fire, it tries too start but won't ? Crazy because it's bone stock and has been reliable for years. Any suggestions ? __________________ 71 C-20 07 Magnum RT AWD

08-02-2015, 12:15 PM	#2
FirstOwner69 Senior Member Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,841	Re: Changed Plugs Now No Start ? Plug wires connected to wrong plug(s)? Trace wires from the distributor. Check and double check. How old are the wires?

08-02-2015, 01:20 PM	#4
hugger6933 Registered User Join Date: Oct 2008 Location: Marianna Arkansas Posts: 7,261	Re: Changed Plugs Now No Start ? Make sure the coil wire didn't get bumped. Jim

08-02-2015, 06:17 PM	#5
Redline novdog Registered User Join Date: Jan 2012 Location: Washington,Il Posts: 632	Re: Changed Plugs Now No Start ? Electrical things can go at any time.Got spark? if not coil? Points Condenser in distributor, knocked a wire off the coil/plug wires on wrong? Sorry for the long list but in my years I've been/done all of them.Just changing plugs didn't do that.something went away out of your control. __________________ It builds on my intelligence when I make a mistake, Boy am I building on it! '67 C-10,'70 Nova SS

08-03-2015, 09:40 AM	#6
D.PASSMORE One of the First Join Date: Jan 2000 Location: St. Augustine,FL. Posts: 4,055	Re: Changed Plugs Now No Start ? Pull the coil wire from the distributer and lay it on top of the cap above the hole. Have someone turn the engine over. You should see and hear the ark going into the distributer cap. That will tell you if you have fire. If you have fire there, then check for ark at the plugs. If you have it there, then check the fuel supply. Remember, you have to have fire and gas to make the engine run. __________________ DAVID PASSMORE ST AUGUSTINE ,FL ZIP 32084 '71 SWB K/10 CUSTOM DELUXE (Chili) '72 BLAZER K/5 Muscle Truck (Mule) '72 LWB K/20 CHEYENNE (Blackie)



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