rough idle 1990 f150
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rough idle 1990 f150
Okay, here's what I got...1990 F150 4.9 i300
problem- when I start the truck it has a rough idle RPM's bog down then jump right back repeatedly. However, when I put my foot on the gas it goes away and smooths out. Let off the gas and it goes right back to what it was doing. Is this a faulty MAP sensor? Computer? Vacuum hose leak? cant figure it out. Please let me know what you think. Thanks in advance.
problem- when I start the truck it has a rough idle RPM's bog down then jump right back repeatedly. However, when I put my foot on the gas it goes away and smooths out. Let off the gas and it goes right back to what it was doing. Is this a faulty MAP sensor? Computer? Vacuum hose leak? cant figure it out. Please let me know what you think. Thanks in advance.
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