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 stuttering power under acceleration
#851982
12/10/07 12:36 AM
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Joined: Nov 2006
Posts: 86
OP
Getting the Wheeling Fever
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My 3.0L has just developed some sort of inconsistent power stutter when accelerating, worse at lower RPM. Not sure how to describe it except that it's similar to when you press the gas pedal in and out quickly, and the truck seems to stutter during acceleration. In neutral the engine revs fine with no stutter, but under load accelerating it does this. Haven't done anything recently except an oil change and cleaned my K&N air filter. Any thoughts? <img src="/forums/images/graemlins/confused.gif" alt="" />
91 SR5 Xtra Cab, 298000km, 4" lift, 56" rear springs, 33-12.5R15 BFG Mud-Terran T/A KM2.....and an '85 axle still waiting to go in.
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Re: stuttering power under acceleration
[Re: rovers1973]
#851983
12/10/07 01:01 AM
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Joined: Oct 2007
Posts: 409
Mudrunner
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Haven't done anything recently except an oil change and cleaned my K&N air filter. Any thoughts? <img src="/forums/images/graemlins/confused.gif" alt="" /> Check that the air flow sensor is operating properly and freely. Something may have been allowed to get stuck in it when you changed filters. - Bryan
-- Bryan
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Re: stuttering power under acceleration
[Re: Bogo]
#851984
12/10/07 02:12 AM
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Joined: Nov 2006
Posts: 86
OP
Getting the Wheeling Fever
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Haven't done anything recently except an oil change and cleaned my K&N air filter. Any thoughts? <img src="/forums/images/graemlins/confused.gif" alt="" /> Check that the air flow sensor is operating properly and freely. Something may have been allowed to get stuck in it when you changed filters. - Bryan OK, checked that, it seems clean and operates freely, as does the throttle valve as well. Also checked the engine codes and no error code coming up either. I know my fuel filter isn't that old either. Had my clutch done about 10 months ago, don't think that would have anything to do with it would it?? here's what one of my plugs looks like for what its worth. Any suggestions anyone? ![[Linked Image]](http://www3.telus.net/public/mikecros/pics/spark_plug_small.JPG)
Last edited by rovers1973; 12/10/07 04:59 PM.
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Re: stuttering power under acceleration
[Re: rovers1973]
#851985
12/12/07 02:57 AM
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Joined: Nov 2006
Posts: 86
OP
Getting the Wheeling Fever
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OK, just pulled all my plugs, cleaned and re-gapped them. (some reason they were all gapped about .045in when manual calls for .031 ??, damn service shops). Gonna see if that makes any difference. The colder it gets, the worse the problem seems to be, although even when fully warmed up, still choppy acceleration. Really starting to drive me nuts. Gotta pass AirCare in the next week or so too. <img src="/forums/images/graemlins/frown.gif" alt="" /> <img src="/forums/images/graemlins/confused.gif" alt="" />
91 SR5 Xtra Cab, 298000km, 4" lift, 56" rear springs, 33-12.5R15 BFG Mud-Terran T/A KM2.....and an '85 axle still waiting to go in.
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Re: stuttering power under acceleration
[Re: rovers1973]
#851986
12/12/07 03:25 AM
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Joined: Oct 2002
Posts: 15,887
Toyota & Classifieds Moderator
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http://www.walkablecommunities.org/Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote. **ubi apis- ibi salus**
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Re: stuttering power under acceleration
[Re: kewlynx]
#851987
12/12/07 04:10 AM
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Joined: Nov 2006
Posts: 86
OP
Getting the Wheeling Fever
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well, after fixing all the plugs, and checking the throttlebody (was pretty clean: thks kewlynx) it seems to run better. Acceleration was pretty smooth. Will see for sure tomorrow a.m. in the cold. Anyone know if the gap on the plugs deteriorate to that big, or would they have been wrong from the start?
91 SR5 Xtra Cab, 298000km, 4" lift, 56" rear springs, 33-12.5R15 BFG Mud-Terran T/A KM2.....and an '85 axle still waiting to go in.
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Re: stuttering power under acceleration
[Re: rovers1973]
#851988
12/12/07 04:44 AM
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Joined: Oct 2002
Posts: 15,887
Toyota & Classifieds Moderator
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I've pulled sparkplugs out of the box that have needed to be regapped, so I always check 'em.
http://www.walkablecommunities.org/Democracy is two wolves and a lamb voting on what to have for dinner. Liberty is a well-armed lamb contesting the vote. **ubi apis- ibi salus**
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Re: stuttering power under acceleration
[Re: rovers1973]
#851989
12/12/07 04:45 AM
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Joined: Apr 2006
Posts: 658
Rock Warrior
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Been pulling plugs for 50 years. Only one time was the gap more than .005 from spec due to wear. That one time was when both the electrodes were simply gone......Motor survived, for some reason.
trafdlo
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Re: stuttering power under acceleration
[Re: wsquaredodie]
#851990
12/12/07 04:49 AM
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Joined: Nov 2006
Posts: 86
OP
Getting the Wheeling Fever
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Thats what I thought. Thanks guys. Should never have let someone else do 'em I guess.
91 SR5 Xtra Cab, 298000km, 4" lift, 56" rear springs, 33-12.5R15 BFG Mud-Terran T/A KM2.....and an '85 axle still waiting to go in.
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