5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Idle going crazy and jerking/bucking

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Old Sep 18, 2007 | 02:24 PM
  #1  
GreenMachine5.0's Avatar
GreenMachine5.0
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Default Idle going crazy and jerking/bucking

Just looking for some suggestions here. Lately my car has been not wanting to idle, bucking on the highway etc. Yesterday it would idle at 4000 rpm then drop to near stall and back to 4000 and it eventually stalled. I have cleaned the mass air and IAC to no avail.

Any similar experience with fixes would be appriated.

Thanks in advance.
Old Sep 18, 2007 | 02:38 PM
  #2  
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WhiteWindsor
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Default RE: Idle going crazy and jerking/bucking

What you described happened in my 93 f-250. I lost two cyl. I doubt that is your problem though. If you havn't done a tune-up lately now would be the time. Dist. cap,rotor,wires,plugs,fuel filter. It could be your module in dist. also.
Old Sep 18, 2007 | 02:42 PM
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r.barn
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Default RE: Idle going crazy and jerking/bucking

check the codes
Old Sep 18, 2007 | 03:43 PM
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GreenMachine5.0
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Default RE: Idle going crazy and jerking/bucking

No codes are being generated....no check engine light, the check engine light has come on in the past with the bucking/jerking but it goes out itself.
Old Sep 18, 2007 | 05:19 PM
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Default RE: Idle going crazy and jerking/bucking

hey my car is doing the same thing. i just had a built up performance transmission put in and now my car does not want to idol and i lost alot of my acceleration. if anyone can help me please do so. i put new plugs new msd wires and cap oil change fuel'oil filter please someone help
Old Sep 18, 2007 | 05:25 PM
  #6  
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slickshift
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Default RE: Idle going crazy and jerking/bucking

ORIGINAL: GreenMachine5.0

No codes are being generated....no check engine light,
You have checked for codes?
Or just assume there is none as the light is dark?
The EEC-IV can store many codes w/o lighting the CEL

I'd check to make sure
I'd be surprised if there is nothing there
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