Rough running and misfire
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Rough Running and Shaking at High Speed
Well just starting a similar problem with my 4.0 liter 1994 aerostar with 197000KM. Tried a pick a part maf but numbers slightly different and fuel consumption has gotten really bad and engine misfires and stutters. Will get proper now as i thought they were all the same. Lucky I kept the old one!! Also have a problem when am about 80kph car shakes until down shifted then seems to settle. Hope these are related somehow.
Last edited by copper_90680; Feb 23, 2008 at 05:13 PM.
Posting Guru
Joined: Jul 2004
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From: Mitchell, SD
When you say shaking, you mean that the whole vehicle shakes?
If so it sounds like a bad drive shaft, u-joints, pinions.
As for your first issue, I would get the correct MAF, and I know new ones are pricy, but going with used will make your life impossible in troubleshooting if there is anything else wrong.
BTW when was the last time you did any plugs? wires? De-carb? check/replace modulator?
If so it sounds like a bad drive shaft, u-joints, pinions.
As for your first issue, I would get the correct MAF, and I know new ones are pricy, but going with used will make your life impossible in troubleshooting if there is anything else wrong.
BTW when was the last time you did any plugs? wires? De-carb? check/replace modulator?
Post Fiend
Joined: Apr 2005
Posts: 5,720
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From: Washington state
rockauto.com is a site sponsor and has about the best prices to be found. great support and shipping. not affiliated in any way except satisfied customer.
a rebuilt MAF from rock auto will work just fine.
http://www.rockauto.com/catalog/x,ca...,parttype,5128
pull the codes and please post to forum
http://fordfuelinjection.com/?p=13
saves throwing away money on unneeded parts.
a rebuilt MAF from rock auto will work just fine.
http://www.rockauto.com/catalog/x,ca...,parttype,5128
pull the codes and please post to forum
http://fordfuelinjection.com/?p=13
saves throwing away money on unneeded parts.
Posting Guru
Joined: Jul 2004
Posts: 2,416
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From: Mitchell, SD
Originally Posted by 96_4wdr
a rebuilt MAF from rock auto will work just fine.
http://www.rockauto.com/catalog/x,carcode,1105142,parttype,5128
http://www.rockauto.com/catalog/x,carcode,1105142,parttype,5128
And I would agree with 96, pull codes before anything else.
Postmaster
Joined: Apr 2001
Posts: 3,818
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Originally Posted by 93nighthawk
.. when was the last time you did any plugs? wires?
Bad plug wires and plugs can cause an unbelieveable amount of engine/transmission problems. Misfiring causes the EEC to drop into different default settings to protect the engine, which in turn affects the transmission shift patterns. If you are hearing rattling sounds, having stumbling issues on slight grades or when pulling away from stop lights, you have plug/wire problems.
A word to the wise, do not buy anything other than Ford OEM or Bosch Premium wires. Yes, they are more expensive, but the high energy system on the 4.0 will destroy cheap wires in less than 30,000 miles of use. As others will testify, this is not idle chatter but cumulative experience.
Last edited by aerocolorado; Feb 24, 2008 at 11:16 AM. Reason: quote not pulling up correctly
