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Old August 11th, 2010, 02:22 PM   #1
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Default bogging and vibration on ford ranger

I left work today and I was pulling onto the highway. I noticed I had my foot about 3/4 on the gas (as usual) because of all the traffic coming. even with my foot down as far as that, my '98 Ranger was not breaking 3000 rpm's until it got over 25. Continuing on my drive home, I noticed every time I accelerated from a complete stop, I had to put my foot down, the truck would shake (pretty bad) and the rpm's would struggle to get to 2500, up until I hit 25, then it drove fine.

I'm pretty sure the vibration was coming from the rear end. Not sure if it's a fuel/timing problem, or if my rear end is about to go...any thoughts will be helpful.
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Old August 11th, 2010, 02:57 PM   #2
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What engine and, any check engine light?
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Old August 11th, 2010, 03:02 PM   #3
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if you think its your rear end jack it up put it in neutral and spin it and see this happened to me in my blazer ended up bein a clogged cat a muffler
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Old August 11th, 2010, 03:22 PM   #4
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What engine and, any check engine light?
My bad, it's a 4.0L, the check engine light came on about 3 hours after this started. My light was on about 2 weeks ago and the truck was throwing a code for a bad o2 sensor, but would an 02 sensor cause problems this bad? I know you can have shitty idleing and stuff, but bogging down and shaking?
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Old August 11th, 2010, 03:26 PM   #5
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The O2 sensor and the check engine light are likely affter affects of the Catalitic converter plugging up. Have you noticed the tell tail sulfer smell from the exhaust. It is faint some times, and a lot of people don't notice it. If you have the smell you likely have the cad converter plugged.
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Old August 11th, 2010, 03:33 PM   #6
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The O2 sensor and the check engine light are likely affter affects of the Catalitic converter plugging up. Have you noticed the tell tail sulfer smell from the exhaust. It is faint some times, and a lot of people don't notice it. If you have the smell you likely have the cad converter plugged.
yes, sometimes when I run my truck in the morning I can smell something, smells somewhat like exhaust (not like sulfur), but it's a "different" smell, I don;t know ho to explain it.
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Old August 11th, 2010, 03:36 PM   #7
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Apply liberal application of three pond hammer to cad converter, (I.E. beat the piss out of it) Rev the shit out of motor, note black soot shit on ground under exhaust.
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Old August 11th, 2010, 03:54 PM   #8
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Apply liberal application of three pond hammer to cad converter, (I.E. beat the piss out of it) Rev the shit out of motor, note black soot shit on ground under exhaust.

or you could go the easy way to test the cat...drill a few holes in the pipe just ahead of the cat, or disconnect it if there is a way to do it easily and be able to easily re-attach it, and then take it for a drive

personally, I would not suggest "beating the piss out of it" since that will guarantee that the cat needs replaced, even if it is not the problem, not to mention everything that breaks loose will travel downstream and cause more exhaust problems...I'm not even going to start on the "rev the shit out of it" statement

what you describe does sound like the cat is the problem, though
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Old August 11th, 2010, 04:12 PM   #9
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yea sounds like a clogged cat or exhaust, i was tryin to figure out why i couldnt go over 50 and why i couldnt go over 3000 rpms. mine through o2 sensors erg codes maf codes i was testing everything except my cat finely i just cut it off behind the cat and beat the shit out of it with a hammer and some stuff came out. i think my exhaust was clogged also so i ran it cat back for a while
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Old August 11th, 2010, 04:26 PM   #10
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I just had the same shit with my Rubicon, 43000 miles and when I got the Cat off so I could look in the inlet side it was all plugged up. 43000 miles WTF. The guy above is correct if you beat the shit out of it you will likely knock pieces down stream into the muffler. However it sounds like that is the problem any how. Go fish, pick your poison.
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Old August 11th, 2010, 10:07 PM   #11
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Have you had any misfiring problems that would cause the cat to become plugged? Vacuum leaks? Do you have access to an oscilloscope. If so test your O2 sensors before beating anything with a hammer. Also a cat test that sometimes works is taking the temp. at the inlet and outlet. A good converter should be 5-10% hotter at the outlet.
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Old August 11th, 2010, 11:02 PM   #12
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isntead of beating the piss out of the cat like a re-tard, you should actually test it. Just take some type of heat reading gague (i use a nice infared one) and see what the temp of the exhaust pipe is before and after the cat, if the temp is less after the cat then it's a bad cat.

the chemical reactions that take place in the cat cause the temperature to rise, so it should be hotter exiting the catalytic converter; if it's working properly

It would either be a clogged cat (or muffler) or a clogged injector
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