Stumped! 5.2 runs rough, backfires then stalls...
Administrator
Joined: Apr 2010
Posts: 87,468
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From: Clayton MI
Clean the throttle body.....
Disconnect battery.
Remove all electrical connections and cables from throttle body.
four bolts hold it on. pull 'em out.
On the back side of the throttle bores, is the passage for idle air. IAC motor bolted to the back side of the throttle body. Remove the IAC, and CLEAN THE SNOT out of those passages.
Reinstall everything, hook the battery back up, start the truck, see if it will idle on its own. If you have a friend handy, have him/her start the truck while you watch the pintle on the IAC, it should move in and out smoothly, to control idle speed, if it doesn't, replace it.
Disconnect battery.
Remove all electrical connections and cables from throttle body.
four bolts hold it on. pull 'em out.
On the back side of the throttle bores, is the passage for idle air. IAC motor bolted to the back side of the throttle body. Remove the IAC, and CLEAN THE SNOT out of those passages.
Reinstall everything, hook the battery back up, start the truck, see if it will idle on its own. If you have a friend handy, have him/her start the truck while you watch the pintle on the IAC, it should move in and out smoothly, to control idle speed, if it doesn't, replace it.
Legend
Joined: Jul 2007
Posts: 7,843
Likes: 13
From: DFW, Texas
When you cleaned your IAC, were you Nicole Kidman, or Amy Winehouse with it?
Rough handling can break the pintle in the IAC in an instant. You won't even know it until you plug it back in.
That's my Amy Winehouse reference for the week, BTW.
Rough handling can break the pintle in the IAC in an instant. You won't even know it until you plug it back in.
That's my Amy Winehouse reference for the week, BTW.
Thread Starter
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Rookie
Joined: Mar 2008
Posts: 76
Likes: 1
From: Detroit
I treated it like a 19yr virgin......now that sounds even worse now that I'm 30..lol. But I just sprayed it down with some tb cleaner and wiped it with some papertowel. I have the tb gasket just no time to work on it :-(
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Rookie
Joined: Mar 2008
Posts: 76
Likes: 1
From: Detroit
Brought the truck home tonight. Put the exhaust back on and gonna pull the TB tomorrow and clean it. But would that cause a vaccum issue? When I push down on the brake pedal it gets soft and spongy. Re-blead them and still soft. Also as I able pressure it wants to stall bad. Not sure if everything could be related?
Last edited by SvrdRam; Aug 9, 2011 at 10:20 PM.
Thread Starter
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Rookie
Joined: Mar 2008
Posts: 76
Likes: 1
From: Detroit
Took the TB off and it looks like an oily mess down there so I'm guessing its time to call hughes and order me up his intake :-)
After sticking some paper towel to see if there was any oil before grabbing a light
After sticking some paper towel to see if there was any oil before grabbing a light
