Mechanics

FORD RANGER RPM PROBLEM

2003 Ford Ranger • 162,000 miles

The truck idles fine and runs good but it makes a whistling sound while accelerating or under any load situations. As soon as you ease off pedal it stops. In park, I can accelerate only to 3000 rpm then it begins to miss and the sound is very loud. I cannot pinpoint it but it it located on the driver's side under the intake. Checked vacuum lines, replaced injector seals, TPS sensor, and throttle body gasket. Noticed that an exhaust manifold bolt is severed. What have I missed?
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Guest
October 25, 2012.




You may have a vacuum leak, try spraying choke cleaner near leak see if rpm change. Broken ex man bolt is not good, that could be causing noise as well as setting a code due to the leak.

Hmac300
Oct 26, 2012.


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