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What cause engine to run lean?

Tiny
JOE1953
  • MEMBER
  • 1996 CHEVROLET SILVERADO
  • 222,000 MILES
Engine have a misfire at idle in #5 cylinder Spark plug wires, Spark plugs, compression or good #5 Spark plug have white carbon build up on it, this engine have a Throttle Body.
Saturday, October 6th, 2012 AT 4:44 PM

37 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Missfire comes from, compression, vacuum leak, low fuel pressure, injector issue. All these need to be checked.

Roy
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Saturday, October 6th, 2012 AT 4:46 PM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
How do I check for vacuum leak.
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Saturday, October 6th, 2012 AT 4:54 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Well, you really need a smoke machine, which is not in everybodys toolbox.

You can try spraying a little carb cleaner around the intake where it meets the head and see if the rpm rise or change

Roy
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Saturday, October 6th, 2012 AT 5:00 PM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
I did spray a little carb cleaner around the upper intake rpm didn't change, what is a smoke machine.
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-1
Saturday, October 6th, 2012 AT 5:20 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You should let a shop do this for you. It is an 1200 dollar tool that injects smoke in the system and you can identify the leak with the smoke.

Roy
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Saturday, October 6th, 2012 AT 10:14 PM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
About how much it will cost for a shop to identify the leak.
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Sunday, October 7th, 2012 AT 3:28 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
THIS IS CRUDE--BUT IT WORKS!

http://www.youtube.com/watch?v=zMok2y05jNE

THE MEDIC
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Sunday, October 7th, 2012 AT 3:59 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Nice one CJ, but if a Havana is required, it is not to be too cheap, lol.
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Sunday, October 7th, 2012 AT 8:34 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
COULD ALSO BE CONNECTED TO A CERTAIN POLITICIAN

BE CERTAIN YOUR SYSTEM IS CAPABLE OF HANDLING THAT KIND OF PRESSURE

THE MEDIC
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Sunday, October 7th, 2012 AT 12:39 PM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
I can't watch the videos do I need to install something on my computer before I can watch the video.
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Monday, October 8th, 2012 AT 4:26 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
You need to have Flashplayer to run the video.
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Monday, October 8th, 2012 AT 4:59 PM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
I went to the link you sent me it didn't seem to help much. Can I get flash player by going to flash player setup wizzard.
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Tuesday, October 9th, 2012 AT 6:33 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Yes, you can get the file at Flashplayer.
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Tuesday, October 9th, 2012 AT 7:14 PM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
Flash player going to cost me $39.95 before I can get it.
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Wednesday, October 10th, 2012 AT 1:45 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
I thought they have freeware?
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Wednesday, October 10th, 2012 AT 1:52 AM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
I took my computer to a repair man for him to install flashplayer so I could watch the video on how to check for vaccum leak useing a cigar, he install inter video win DVD 4 can I watch the video useing it, I still not able to watch the video, unless I am not useing it correct.
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Saturday, October 13th, 2012 AT 2:43 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
IT SHOULD BE AS EZ AS. CLICKING ON THE LINK (THE HIGHLIGHTED TEXT IN BLUE)

YOUR SCREEN SHOULD AUTOMATICALLY JUMP TO "YOU TUBE". ON THE CORRECT VIDEO

ONCE THERE, IT SHOULD PLAY ON IT'S OWN. YOU CAN ENLARGE IT, REPLAY IT OR STOP IT OR DO A MULTITUDE OF THINGS!

SINCE THE LINK WAS IN MY POST. WHEN YOU GET DONE, CLICKING THE "BACK BUTTON" SHOULD BRING YOU RIGHT BACK TO THE POST

MAYBE YOU NEED TO GET YOUR COMPUTER GUY TO SHOW YOU---HAVE HIM CLICK ON THE LINK IN FRONT OF YOU

YOU JUST DON'T KNOW WHAT YOU ARE MISSING ON YOU TUBE---NEARLY EVERYTHING CAN BE PULLED UP ON THERE. INCLUDING "HOW TOs" FOR ALMOST ANY TASK. ALL YOU GOTTA DO IS TYPE ANYTHING IN THE "SEARCH BOX" AT THE TOP OF THE YOU TUBE VIDEO BOX

THE MEDIC
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Saturday, October 13th, 2012 AT 3:07 AM
Tiny
JOE1953
  • MEMBER
  • 635 POSTS
I was just wonder do I need to creat an account before I can watch video on you tube.
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Saturday, October 13th, 2012 AT 3:52 AM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,005 POSTS
NEGATIVE. THAT'S JUST SO YOU CAN SEE THE RAUNCHY STUFF

THE CIGAR VIDEO DOES NOT INVOLVE EX-PRESIDENT CLINTON OR STAFF

. SORRY!

. IT'S JUST A HYPER SQUIRRELY GUY SHOWING YOU HOW TO WORK ON A CAR

THE MEDIC
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Saturday, October 13th, 2012 AT 4:02 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Usually if it does not load up, they would provide a link for you to download the required flashplayer. Maybe you have some firewall or antivirus software that is blocking it.
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Saturday, October 13th, 2012 AT 11:25 AM

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