Question about 1986 Ford Ranger 2WD
Ok fine people, wrap your noodles around this one. 2.9L EFI engine, starts perfectly every time. Idles all day long no prob. Try to go and as long as you don't push the gas pedal down too far you will move along. But go past that point (maybe 1/4 of the way down) and it acts like it is running out of gas. Surges and bucks like crazy. Push in the clutch and keep the pedal to the floor and it lopes between almost dying and just short of winding up to the point of letting off it for fear of winding it too tight. Not quite to there but just before. It will do that until you let up off the pedal back to that 1/4 down point and then will gain rpms and rev sounding perfect. I've changed both fuel pumps, fuel filter, press. regulator, cat. conv., fuel injectors. What the hell? Ready to drench it in gas and watch it burn. Any ideas? If not someone bring over some weiners and beer and we will make an evening of it.
Popping can mean its running too lean. i know this is a 4yr old topic, but hey if this helps anybody....
'86 was carbs era.. maybe throttle-body injection, but if carb: little tiny pinhole ports where the butterfly opens when you step on the gas, that valve opens. can take a piece of strong kind of small wire to poke in those holes (ports) then hit with a squirt of carb cleaner. or its dirty main jet or the main jet vacuum diaphram (or vacuum leak elsewhere). tps indicator is a good idea too. but might be too old (vintage) for that. fuel injection -definitely. fuel injected, it could be MAF if problem happens after like 30 -90 seconds ... there's a timer on that circuit. Good luck felow diy-ers. Cheers
Posted on Jan 22, 2015
I have an 86 ranger 2wd with the 2.9 in it and I have had similar problems. Mine would run great for about ten minutes or so, (until it was nice and warmed up) and then it would start bucking, and popping and just running like ****. For me, the TPS (throttle position sensor) was the culprit. Very easy to test. Take your tps off, (it is held on the passenger side of the throttle body by 2 screws). After you have it off, you will see 3 prongs where the plug goes. Using any ohm meter, put the positive tester lead on the middle prong and the neg. lead on either of the other prongs. VERY slowly turn the tps actuator, (the part that turns as you accelerate). As you turn it, the ohms should increase at the exact same rate as you are turning it. If the ohm meter gets erratic, (starts going up, or down very quickly, or simply does nothing) then your TPS needs to be replaced.
Posted on Mar 12, 2010
I had the EXACT same problem, the culptrit? For me it was the O2 sensor on the exhaust. Check yours, if its bad then thats the problem.
An o2 sensor sends "messages" to the engine telling it how rich/lean to run, so if thats bad it will run like ****.
Posted on Nov 24, 2008
Try spraying your distribotor cap w/ wd-40, sounds crazy try it. moisture around and in distributor will make it do that. better yet replace dist. cap and rotor all together. no more problems. check it out. try wd first. pull cap off and look for corrosion i bet thats your problem.hope this helps
Posted on Nov 04, 2008
try replacing the engine with one that is not a piece of ****. Also, you may try buying a new car with a warranty
Posted on Feb 08, 2010
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Posted on Jan 02, 2017
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