rough and jerking idle
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Freshman User
Joined: May 2004
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rough and jerking idle
I have a '94 F-150 with a 302 EFI. It runs rite for aroudn two seconds then has like a twitch adn then runs rite again for another two seconds and jstu keeps doin that. it doesnt realy shake all the time. I changed the spark plugs, wires, rotar, cap, cleaned the throttle body, EGV adn idle air control valve. it jstu keeps doin it. I keep hearin somethign about the tps about roudh idleing. i was wondering wut that does and where it is?
Senior User
Joined: Jun 2003
Posts: 352
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From: Tillamook, Ore
TPS is Throttle position sensor and is located on the throttle body. Right on the bottom of it on my 5.8. I think there is enough lead on the connector to check it, but you'll probably have to remove the throttle body to replace it.
Junior User
Joined: Mar 2004
Posts: 93
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From: Las Vegas, NV
You will need a paperclip, a pen, a piece of paper, and this link:
http://www.broncodata.com/tech/codes.htm
Ignore the part about the meter sweeps. Hook up the paperclip, get in the cab, and watch the check engine light.
http://www.broncodata.com/tech/codes.htm
Ignore the part about the meter sweeps. Hook up the paperclip, get in the cab, and watch the check engine light.
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Freshman User
Joined: May 2004
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i finnaly figured it out. i got 139 meanin no left HEGO switching, 177 left HEGO indicates rich, 225 knock sensor not detected in the KOER test. I got 327 meaninEGR valve sensor low voltage in the KOEO test. wut does HEGO mean?
Senior User
Joined: Nov 2002
Posts: 158
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From: Champlin USA
well see......those codes helped you a lot. NOT!!!
my truck has a rough idle too. heres the kicker....i went and rebuilt mine, the rough idle stayed!!! $2200 and the damn thing still idles rough!!!!!! i just drive around and shift into neutral when i come to a stop. id love to get the damn thing fixed but after about a year on this board no one has helped.
ya fuel injection is great but hope to hell none of it goes on the fritz
my truck has a rough idle too. heres the kicker....i went and rebuilt mine, the rough idle stayed!!! $2200 and the damn thing still idles rough!!!!!! i just drive around and shift into neutral when i come to a stop. id love to get the damn thing fixed but after about a year on this board no one has helped.
ya fuel injection is great but hope to hell none of it goes on the fritz
