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Old 06-13-2010, 12:15 PM
87fordranger 87fordranger is offline
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Exclamation sluggish

when i first start my truck it runs and drives fine, but when the engine warms up it gets real sluggish and has low power, ive replaced spark plugs distributor cap wires, every fuel pump and filiter, and the coil. any ideas?
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Old 06-15-2010, 01:14 PM
Psychopete Psychopete is offline
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Default Re: sluggish

See if you can pull codes from the computer system ('87 will not light a "check engine" light). Some sensors are not used until it goes into closed loop. Could be ECT, o2 sensor, failing TFI, etc. But check the computer for codes (particularly CM) first before replacing anything.
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