how can i fix problem with my 88 f150 with 4.9l efi,it has an unstable ildle.thanks


Asked by Dec 13, 2014 at 02:35 PM about the 1988 Ford F-150 S Standard Cab SB

Question type: Maintenance & Repair

when idling its fluctuates between 7 and 1000 rpm at times ,then stablizes at8.5
its an intermittent problem.can you help . thanks

2 Answers


has it been tuned up in a while? Possible problems. plugs. Check wires with Ohm meter should read about 5K ohms per foot. Possible coil, check specs. IACV check. These are things you can check that will not cost you anything. Do not begin throwing expensive parts at the problem hoping you will hit it.

1 out of 1 people think this is helpful.

thank you for your input ,i will try your suggestions,

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