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I've got a 2000 ranger with the 2.3 liter 4 cylinder, and ever since I got the truck (I got it a bit under a year ago, and it had 5000 miles on it--18000 miles on it now), its always knocked on regular gas. I could be running down the road at 45 mph, or 70 mph, and I will hear a constant, consistent rapping. It basically knocks anytime I'm running relatively high rpms-like when I run 70 mph in 5th gear.
So I upgraded to 89 octane, and it basically stops, occasionally there's a stray knock. I took it to my dealer (still under warrantee), and he told me that there's not much else I can do other than upgrade fuels.
anybody else have this problem with a ranger and any ideas to let me go back to using cheaper gas?
I'm sorry, but I beleive that you really have no other choice than to run the higher octane. I think that you'll find that alot of other ranger owners with the combination that you have would tell you the same thing.
I could be wrong, but doesn't your owners manual say to use at least 89 octane?
You'll want to make sure your DPFE valve has been replaced. You are supposed to have a 5/50000 warranty on your emissions parts. i.e. Ford should replace it for free. If the valve is the aLLUMINUM one chances are it has gone bad. When I got mine the parts guy said the original alluminum ones go BAD. When I replaced my valve, I noticed LESS pinging. I need to do my plugs again now because driving it with the pinging probably has effected my plugs. WEll SEE.
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