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Old 05-28-2010, 03:53 AM
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1995 F350

Hey guys,
I got a 1995 Ford F350 that has a 351w in it and has about roughly 60k miles on it the previous owner said, blew the head gaskets and replaced the motor. I just picked up the truck and it has a weird idling problem. The problem i am experiencing is when the truck is at idle it will raise up and down for some od reason. Also sometimes it will stay at high idle and i have no clue why? What do you guys think?
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Old 06-06-2010, 01:33 PM
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Try to clean out the IAC valve on the passenger side of the intake manifold.
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Old 06-10-2010, 02:03 PM
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Thank you now what mods can I do to the truck for more performance I know a chip on gassers won't do much improvment so would 24lb injectors help? Or what do you guys think I should do?
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Old 03-08-2011, 10:35 AM
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Edelbrock fuel injected intake was the best mod made so far. Going to do GT-40 alum heads in the summer.
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Old 03-09-2011, 06:50 PM
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I'd like to know how they blew the head gaskets on a 351W. They are pretty durable in that department.

The idle air control valve is cheap enough to replace. Search everywhere for vacuum leaks. And do not under estimate the ability of the EGR valve on these engines to cause idle and smoothness issues. A crack in the up-pipe from the manifold or a faulty valve can cause havoc. These engines DO NOT like unmetered air entering the plenum anywhere. Be it from the fresh air duct (past the mass airflow sensor), or anywhere the manifold might get air OR any gasses (ie: EGR).

Take the throttle body off and clean it with a throttle body cleaner solvent (not carb cleaner). Also the throttle position sensor on the bottom of the throttle body may be haywire. And dont forget the EGR valve back behind the upper intake coming from the pass valve cover.

The deal is...it could be many things and checking stuff (like the throttle position sensor) is an easy, but technical process. You need a factory manual really to troubleshoot. The good news is this problem is usually easy to fix, once discovered what it is.

As far as typical things you'd mod on a Mustang...like the intake...those things don't always translate to improvements on trucks. Especially heavy work trucks. The power/torque ranges are different for different applications. An Edelbrock intake could cause low end torque to suffer.

At least its not an OBDII engine starting in 1996. OBD 351W's are a little trickier to mod on little things like exhaust etc.
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