oh god what did I break. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

THE "10" SILVERADO · 03-07-2012, 03:38 PM

Problem. On the way to school today in my truck (77 Silverado, 350) I hit the same bump I always do, no problem right? Next light (1oo yards) as soon as I stop the truck starts shaking back and forth. It literally vibrates more than the 67 Chevelle 454 we have. It has never done that before and only shakes in idle. Driving it is smooth and fine.

I have no idea what the problem might be but also today it started smelling like a coal plant. I have the windows down everyday (a/c doesn't work) and it has never done that before. I really hope there was no one behind me with the windows down because they got smelled out.

Please any help would be appreciated.

cory d · 03-07-2012, 04:03 PM

ive played around with my points ignition (yea i know ha) and if they arent right it can run like hell and rattle your teeth. i think ignition would be a god place to start

75sierraclassic · 03-07-2012, 06:38 PM

Check your plug wires. You might have one that is shorted on the header or exhaust manifold. A V8 will run quite smooth on 7 cylinders off idle. Rough while idling though. I'm thinking somewhere in the ignition system.

Nin92 · 03-07-2012, 08:54 PM

I agree with checking your plug wires. Had the exact same problem; rough idle/misfire. Looked at the wires and one of them was burnt through. Replacing them solved the problem!

1964c-10 · 03-07-2012, 09:18 PM

broken exhaust?

THE "10" SILVERADO · 03-07-2012, 10:46 PM

Went through and checked the wires to make sure they were all plugged in. They were but I went ahead and got new plugs/wires from O'Riellys. Going to try to get them installed ASAP. Hopefully nothing breaks in the meantime.

jhngardner367 · 03-08-2012, 12:46 AM

Check for a restricted exaust,or an egr problem,or a broken/cracked pcv valve/hose.

Gyawo · 03-08-2012, 01:14 AM

Gotta check your cap and rotor too. Kind of sounds like a misfire.

THE "10" SILVERADO · 03-08-2012, 09:59 AM

Another problem surfaced today. I haven't had any time to put in the new plugs and wires but I'm having a drop in power and acceleration. From idle if I don't really mash on it there is a delay and it acts like it wants to die. I found this out after it died halfway out of my driveway. Would this also be part of the ignition problem?

Thanks guys.

motornut · 03-08-2012, 12:35 PM

vac advance workin ok?

THE "10" SILVERADO · 03-08-2012, 01:05 PM

Quote:

Originally Posted by motornut

vac advance workin ok?

No idea, how do I check it?

THE "10" SILVERADO · 03-08-2012, 05:47 PM

Well it died today. Right now I am at my grandma's waiting on my stepdad to come pick me up. Pulled apart the air cleaner and opened the butterfly to see if it got air and it died at idle with it open. It just won't run. Thinking the fuel filter is clogged or maybe the fuel pump isn't working? Not sure now....

motornut · 03-08-2012, 07:53 PM

Vac advance ... Take the cap/rotor off and check the weights are swinging freely
Remove the Vac line @ the carb , blow and suck see if it moves in out .
I also removed the line ,pump to carb, flushed it out.
Fulla rusty dirty gas.
Also may wana check rubbers areas of 3/8 line.
Should hear bubbles if you blow air back in that 3/8 again by mouth
This checks for leaks tank to carb
Try pouring gas in carb does it run?..
Posted via Mobile Device

Dunenutt · 03-08-2012, 08:13 PM

Sounds like you stirred up some gunk in the float bowls, and it got into the idle circuit of the carb.

03-07-2012, 03:38 PM	#1
THE "10" SILVERADO Registered User Join Date: Sep 2010 Location: Marble Falls, TX Posts: 1,575	oh god what did I break. Problem. On the way to school today in my truck (77 Silverado, 350) I hit the same bump I always do, no problem right? Next light (1oo yards) as soon as I stop the truck starts shaking back and forth. It literally vibrates more than the 67 Chevelle 454 we have. It has never done that before and only shakes in idle. Driving it is smooth and fine. I have no idea what the problem might be but also today it started smelling like a coal plant. I have the windows down everyday (a/c doesn't work) and it has never done that before. I really hope there was no one behind me with the windows down because they got smelled out. Please any help would be appreciated. __________________ Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9

03-07-2012, 04:03 PM	#2
cory d Registered User Join Date: Dec 2011 Location: Arlington WA Posts: 1,728	Re: oh god what did I break. ive played around with my points ignition (yea i know ha) and if they arent right it can run like hell and rattle your teeth. i think ignition would be a god place to start __________________ GMC C15 355 SM465 3.73 80 C10 cruiser build thread 79 short stepside crew cab. big and ugly. build thread

03-07-2012, 06:38 PM	#3
75sierraclassic Registered User Join Date: Jun 2002 Location: Kansas City, MO Posts: 186	Re: oh god what did I break. Check your plug wires. You might have one that is shorted on the header or exhaust manifold. A V8 will run quite smooth on 7 cylinders off idle. Rough while idling though. I'm thinking somewhere in the ignition system.

03-07-2012, 08:54 PM	#4
Nin92 Registered User Join Date: Jan 2012 Location: Pensacola Florida Posts: 94	Re: oh god what did I break. I agree with checking your plug wires. Had the exact same problem; rough idle/misfire. Looked at the wires and one of them was burnt through. Replacing them solved the problem! __________________ My Build:http://67-72chevytrucks.com/vboard/s...d.php?t=564420

03-07-2012, 09:18 PM	#5
1964c-10 Registered User Join Date: Nov 2010 Location: State Center, IA Posts: 212	Re: oh god what did I break. broken exhaust? __________________ 2003 Serria K1500 1998 Camaro 1964 C10 long fleetside bed, small back window, 3 on the tree 1964 C20 custom cab, long fleetside bed, big back window, 4 on the floor Disclaimer- anything posted is only based on my personal experience, opinions, and advice given by others. There are no implied or written warranties or guarantees with anything posted on this website.

03-07-2012, 10:46 PM	#6
THE "10" SILVERADO Registered User Join Date: Sep 2010 Location: Marble Falls, TX Posts: 1,575	Re: oh god what did I break. Went through and checked the wires to make sure they were all plugged in. They were but I went ahead and got new plugs/wires from O'Riellys. Going to try to get them installed ASAP. Hopefully nothing breaks in the meantime. __________________ Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9

03-08-2012, 12:46 AM	#7
jhngardner367 Registered User Join Date: Feb 2012 Location: Austin, Arkansas Posts: 248	Re: oh god what did I break. Check for a restricted exaust,or an egr problem,or a broken/cracked pcv valve/hose. __________________ Always expect the unexpected,....but don't expect the unexpected to be the unexpected you expect ! I'm busier than a one-legged cat,in a sandbox! Veteran..and proud ! I can't fix what ain't broke....you want I should break it?

03-08-2012, 01:14 AM	#8
Gyawo Registered User Join Date: Dec 2010 Location: Alberta Posts: 165	Re: oh god what did I break. Gotta check your cap and rotor too. Kind of sounds like a misfire.

03-08-2012, 09:59 AM	#9
THE "10" SILVERADO Registered User Join Date: Sep 2010 Location: Marble Falls, TX Posts: 1,575	Re: oh god what did I break. Another problem surfaced today. I haven't had any time to put in the new plugs and wires but I'm having a drop in power and acceleration. From idle if I don't really mash on it there is a delay and it acts like it wants to die. I found this out after it died halfway out of my driveway. Would this also be part of the ignition problem? Thanks guys. __________________ Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9

03-08-2012, 12:35 PM	#10
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: oh god what did I break. vac advance workin ok? __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

03-08-2012, 05:47 PM	#12
THE "10" SILVERADO Registered User Join Date: Sep 2010 Location: Marble Falls, TX Posts: 1,575	Re: oh god what did I break. Well it died today. Right now I am at my grandma's waiting on my stepdad to come pick me up. Pulled apart the air cleaner and opened the butterfly to see if it got air and it died at idle with it open. It just won't run. Thinking the fuel filter is clogged or maybe the fuel pump isn't working? Not sure now.... __________________ Michael Re-starting the neglected '77...http://67-72chevytrucks.com/vboard/s...=425464&page=9

03-08-2012, 07:53 PM	#13
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: oh god what did I break. Vac advance ... Take the cap/rotor off and check the weights are swinging freely Remove the Vac line @ the carb , blow and suck see if it moves in out . I also removed the line ,pump to carb, flushed it out. Fulla rusty dirty gas. Also may wana check rubbers areas of 3/8 line. Should hear bubbles if you blow air back in that 3/8 again by mouth This checks for leaks tank to carb Try pouring gas in carb does it run?.. Posted via Mobile Device __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

03-08-2012, 08:13 PM	#14
Dunenutt Newbee Join Date: Jan 2010 Location: Phoenix, Arizona Posts: 1,406	Re: oh god what did I break. Sounds like you stirred up some gunk in the float bowls, and it got into the idle circuit of the carb. __________________ My Build, http://67-72chevytrucks.com/vboard/s...58#post4464158



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