Car dies at idle...sometimes

jonrhy05 · July 1st, 2011, 11:49 PM

only had the car a week, and about once a day, sometimes 2 or 3, the car dies at idle...after jumping from a couple hundred rpms, up o 1000 for a couple seconds. ive changed upper intake gasket, and ordered a new IAC gasket, the only vacuum lines that i can see are the 2 comin off the upper intake, and somethings blocked off on top of the throttle body...any other suggestions.

Stevo077 · July 2nd, 2011, 12:12 AM

Is it running rich?

fb93 · July 2nd, 2011, 02:08 AM

Sounds like idle surge. Is this for the Fox? Engine mods? Does it have a chip? Id start by cleaning the IAC and PCV valve filter using carb cleaner. Also check the TPS voltage, and fuel pressure. If its MAF, the sensor could be dirty. If the timing is off just enough it can mess with the idle. When was its last tuneup? Plugs, cap, rotor, wires, air and fuel filter? Wouldnt hurt to check all the vac lines and hoses as they wear out with age.

And the top of the throttle body (for a Fox) has a hose leading to the side of the oil filller on the passenger side valve cover.

1987GT5.0 · January 28th, 2012, 12:22 AM

I'm havin the same issue... I think it's an amperage problem, if I resolve it I'll tell you what it was... If you'll do the same for me lol

July 1st, 2011, 11:49 PM	#1
jonrhy05 Regular Join Date: Feb 2010 Posts: 87 iTrader: 0 reviews	Car dies at idle...sometimes only had the car a week, and about once a day, sometimes 2 or 3, the car dies at idle...after jumping from a couple hundred rpms, up o 1000 for a couple seconds. ive changed upper intake gasket, and ordered a new IAC gasket, the only vacuum lines that i can see are the 2 comin off the upper intake, and somethings blocked off on top of the throttle body...any other suggestions.

July 2nd, 2011, 12:12 AM	#2
Stevo077 Regular 1990 Mustang GT Join Date: Jun 2011 Location: NE Oklahoma Posts: 123 iTrader: 0 reviews	Is it running rich? __________________ 1990 Mustang GT Last edited by Stevo077; July 2nd, 2011 at 03:08 AM.

July 2nd, 2011, 02:08 AM	#3
fb93 Regular 1993 Mustang GT Join Date: Jul 2011 Location: PA Posts: 93 iTrader: 0 reviews	Sounds like idle surge. Is this for the Fox? Engine mods? Does it have a chip? Id start by cleaning the IAC and PCV valve filter using carb cleaner. Also check the TPS voltage, and fuel pressure. If its MAF, the sensor could be dirty. If the timing is off just enough it can mess with the idle. When was its last tuneup? Plugs, cap, rotor, wires, air and fuel filter? Wouldnt hurt to check all the vac lines and hoses as they wear out with age. And the top of the throttle body (for a Fox) has a hose leading to the side of the oil filller on the passenger side valve cover. Last edited by fb93; July 2nd, 2011 at 02:15 AM.

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January 28th, 2012, 12:22 AM	#4
1987GT5.0 Foxbody5.0 1987 Mustang GT Join Date: Jan 2012 Location: Fort Polk LA Posts: 18 iTrader: 0 reviews	I'm havin the same issue... I think it's an amperage problem, if I resolve it I'll tell you what it was... If you'll do the same for me lol

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