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Old 07-14-2013, 08:28 AM
ragnarock ragnarock is offline
Learning to use the forums
Join Date: Jul 2013
Posts: 2
Default Re: 00 idles low then dies, only when hot

My 99 4.0 had this problem for several months. I was getting PO171 & PO174 codes intermittently. Ran fine when cold, maybe a little low, but would just die when it was hot or running A/C. I changed plugs, PCV, fuel treatments, etc. Having read posts about all the different things causing these problems, i was going in all different directions. The ranger's computer finally gave me one fixed code, PO1507. This code pointed me the IAC valve, idle air control valve. I replaced it for $42 from autozone, have had no issues for several months now.
99 Ranger 4.0 OHV
A/T 2wd, BONE stock
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