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02-22-2010, 12:24 PM
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#1 |
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Registered User
Join Date: Nov 2005
Location: Birdseye, IN
Posts: 99
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tune-up problem
My truck was due for a little work so I replaced the fuel lines/filters, plugs/wires, fixed an exhaust leak, and changed the oil. It runs much better when it's warmed up, but when first started it runs very rough. It seems to be getting enough gas, but the engine really shakes the truck. Also when I give it gas the lights get brighter and when I let off they get more dim. Is that normal?
Any advice on what to look at first? |
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02-22-2010, 12:28 PM
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#2 |
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Gone Fishing
Join Date: Aug 2005
Location: Fort Worth, Texas 76135
Posts: 12,361
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Re: tune-up problem
make sure you have the plug wires in the right firing order
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68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop  Frame of resto has been started2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616 |
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02-22-2010, 01:21 PM
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#3 |
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Registered User
Join Date: Nov 2005
Location: Birdseye, IN
Posts: 99
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Re: tune-up problem
I didn't check the order to start with but I had been running the truck for years on the order it's on and it idled ok. When I replaced them I did them one at a time to not confuse any. I'll double check when I get home. I also gapped the plugs.
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02-22-2010, 01:26 PM
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#4 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: tune-up problem
points or hei dizzy? different plug gaps for the two//if points did you set dwell? have you checked for bad vaccume hoses?
lights getting brighter is normal
__________________
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 |
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02-22-2010, 01:48 PM
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#5 |
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Registered User
Join Date: Nov 2005
Location: Birdseye, IN
Posts: 99
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Re: tune-up problem
Points. I didn't adjust the dwell and never have. Can I simply adjust it by trial and error and see if it runs better? I haven't checked the vacuum hoses so I'll look into that too.
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02-22-2010, 01:55 PM
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#6 |
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Between Trucks...
Join Date: Mar 2002
Location: Los Angeles, CA.
Posts: 3,830
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Re: tune-up problem
Can't run points and not adjust the dwell.
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Beat it to fit, Paint it to match... 
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02-22-2010, 02:05 PM
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#7 |
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Registered User
Join Date: Nov 2005
Location: Birdseye, IN
Posts: 99
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Re: tune-up problem
When does the dwell need adjusted? I didn't change the points. Do you adjust it everytime you put new plugs in?
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02-22-2010, 03:57 PM
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#8 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: tune-up problem
every 5000 miles is a good interval for checking cleaning and adjusting points
__________________
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 |
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02-22-2010, 06:29 PM
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#9 |
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Registered User
 
Join Date: Feb 2008
Location: Williamsburg, Va
Posts: 226
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Re: tune-up problem
I have also purchased new plugs that were bad from the factory. Just a thought. Good Luck.
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The more I learn, the more I find out I don't know. 69 Chevy SWB w/67 front end 4 wheel discs 468 BB 700R4 Bagged Coming around slowly |
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02-22-2010, 07:13 PM
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#10 |
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Registered User
Join Date: Oct 2005
Location: Overland Park, Ks.
Posts: 5,229
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Re: tune-up problem
If you set the point gap with a feeler gauge the dwell will be in limits.
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02-22-2010, 09:12 PM
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#11 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: tune-up problem
I would start with replacing the points and doing all the BS that goes along.
Actually, I'd start with an HEI swap. |
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02-22-2010, 09:17 PM
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#12 |
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Registered User
Join Date: Aug 2009
Location: Denver, CO
Posts: 291
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Re: tune-up problem
x2. any other effort or $ spent is a waste of time
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__________________________________________ Sean 1972 C20 2005 4Runner 
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