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09-08-2003, 11:53 AM
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#1 |
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Registered User
Join Date: Aug 2001
Location: texas, usa
Posts: 194
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idle problem
have had this nagging problem for the past week or so...
truck starts fine and runs fine but once a day or so it starts to idle really rough at stoplights. it runs fine when i put my foot into it a bit, but returns to running roughly when i stop again. if i kill the truck and restart, the problem goes away. my truck is a 71 cheyenne. it has a 350, all stock except for HEI. just changed my spark plugs/wires 3 months ago when i switched to HEI. any thoughts or help are appreciated. |
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09-08-2003, 12:45 PM
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#2 |
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Senior Member
 
Join Date: Jan 2001
Location: Orem, Utah
Posts: 7,976
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When a motor starts running rough at idle, I start looking for a vacuum leak.
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I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson |
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09-08-2003, 12:57 PM
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#3 |
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Its Magically Delicious
Join Date: Jan 2003
Location: oregon
Posts: 2,398
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mine too ...its very unpredictable .... and annoying when it happens
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71 C10 LWB 350sbc -TH350 12 bolt 3.42 Posi Of all my favorite things to do, The utmost is to have a brew. My love grows for my foamy friend, with each thirst-quenching elbow bend. Beer so frosty, smooth, and cold it's paradise pure liquid gold. Yes beer means many things to me that's all for now cus I gotta pee. |
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09-08-2003, 01:06 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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yep i'd look at a vaccume leak and the advance mech ecpeciaaly if it was a used piece that u put in also when was the last time u changed the fuel filter??
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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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09-08-2003, 01:08 PM
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#5 |
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Senior Member
Join Date: Sep 2002
Location: Greenfield Mass.
Posts: 551
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 I had that problem with my 90 chevy pickup it was the wires in the hei. they were corroded where it plugs into the module . it would hunt for an idle until you got on it then it had enough spark to run good. it also was interrmitent and hard to diagnos. just my 02#   
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Certifiably crazy person |
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09-08-2003, 01:48 PM
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#6 |
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Formerly yellow72custom
Join Date: May 2001
Location: Austin, TX
Posts: 7,531
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Yup...check for a vaccum leak as stated above, and check what your timing is running at.
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'72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg |
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09-08-2003, 02:26 PM
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#7 |
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Registered User
Join Date: Aug 2001
Location: texas, usa
Posts: 194
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thanks for the suggestions. will check for a vacuum leak tonight.
as for the fuel filter idea, you may be onto something. i just changed it, however, i just had my gas tank out to paint my truck. maybe i stirred up some bad stuff and need to change it out again. thanks again. |
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