engine bucks around 35-45 mph

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Jun 21, 2003 | 05:59 PM

manirron

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engine bucks around 35-45 mph

I have a 2000 ranger with 3.0 6 cyl...also 5 speed manual transmission..the motor seems to "buck" between 35 and 45 mph..I thought it might be the fuel filter as I ran it out of gas once few months ago so I replaced it..I have also :
replaced spark plugs
replaced air filter
ran stp fuel injector treatment through it

there is a sticker near the front that says the timing,idle, and mixture cannot be adjusted...also the distributor cap cannot be replaced and there is no rotor inside of it..any ideas before I
have to pay some grease monkey to look at it?

Jun 21, 2003 | 09:20 PM

Ken00

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From: South Jersey

engine bucks around 35-45 mph

What rpms are you turninng when it happens? Do you get a CEL or ABS light?

Jun 22, 2003 | 05:59 AM

manirron

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engine bucks around 35-45 mph

no CEL or ABS lights...I dont have a tachometer

Jun 22, 2003 | 06:53 AM

Richie T

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From: Mount Solon, VA

engine bucks around 35-45 mph

Is it a constant bucking?? My '00 XLT 3.0 FFV started to miss under hard acceleration in that speed range too after a mechanic cracked the #1 plug and replaced it with a new one. What brand of plugs do you use??

I replaced my plugs with Motorcrafts and found that my #4 cyl plug was cracked and the gap on the old ones was way off. I disconnected the battery for 10-15 minutes and then followed the relearn procedure from the owner's manual. It doesn't have the miss anymore.

Try resetting the computer and see if that helps.

Jun 22, 2003 | 08:18 AM

manirron

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engine bucks around 35-45 mph

oh yeah i disconnected the battery last thursday night..but i changed the plugs yesterday so i'll disconnect battery again to reset computer...i am using autolite plugs...changed them myself last december and had no problem...i think i have had problem since running out of gas once a few months ago..maybe coincidence...maybe i need to have throttle body cleaned because of a post i saw here...
should have stayed with toyota? (sorry to all you hard-core ford fans)

Last edited by manirron; Jun 22, 2003 at 08:22 AM.

Jun 22, 2003 | 09:24 AM

Bob Ayers

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From: Durham, NC

engine bucks around 35-45 mph

I would try plug wires next....Welcome to FTE!!!!

Jun 22, 2003 | 11:58 AM

manirron

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engine bucks around 35-45 mph

i disconnected battery again to reset cpu...it seems to be doing much better...need to drive it a little more yet..evidently it didn't accomplish anything when i reset it last week with the old plugs still in..haven't found any "re-learn" info in my 2000 ranger owner manual yet...now if i could just get rid of that clunking noise in my front end i might actually be happy with this truck..
only 60,500 on it

thanx dude & ya'll