still missing at low rpms...
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From: Toms River,NJ
still missing at low rpms...
ok so bout a month ago i changed my spark plugs and wires and have been have this missing problem since i changed them...got a new cap n rotor and still no improvment..also checkd the gaps there good and got (3) different sets of wires...check engine like came on so i thought that was the problem...fix the egr and evp no check engine light anymore but it still missing at idle....any ideas?
-1995 4.9l
-1995 4.9l
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Joined: Jul 2007
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From: Cape Girardeau MO
If the problem started after you changed parts, then it leads to suggest a review of what you did.
From personal experience - have had problems with cheapie wire sets being bad out of the box, as well as the infamous off-by-one on the cap where the wires were in the right order, but one post off. D'Oh!
From personal experience - have had problems with cheapie wire sets being bad out of the box, as well as the infamous off-by-one on the cap where the wires were in the right order, but one post off. D'Oh!
Thread Starter
Senior Member
Joined: Nov 2010
Posts: 208
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From: Toms River,NJ
If the problem started after you changed parts, then it leads to suggest a review of what you did.
From personal experience - have had problems with cheapie wire sets being bad out of the box, as well as the infamous off-by-one on the cap where the wires were in the right order, but one post off. D'Oh!
From personal experience - have had problems with cheapie wire sets being bad out of the box, as well as the infamous off-by-one on the cap where the wires were in the right order, but one post off. D'Oh!
i mean i have been throught (3) sets of wires...from motorcraft-duralast....also i mean all the wires have to b right i checked it 20 times...then cap is labeled #1 on it anyway...
should i try another set of wires?
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Joined: Jul 2008
Posts: 58,557
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From: Long Beach Calimexifornia
If the problem started after you changed parts, then it leads to suggest a review of what you did.
From personal experience - have had problems with cheapie wire sets being bad out of the box, as well as the infamous off-by-one on the cap where the wires were in the right order, but one post off. D'Oh!
From personal experience - have had problems with cheapie wire sets being bad out of the box, as well as the infamous off-by-one on the cap where the wires were in the right order, but one post off. D'Oh!
If your sure it isn't ignition related, this stuff alway's helps Idle quality & throttle response.
https://www.f150forum.com/f33/how-se...-1991-a-31505/
Last edited by ymeski56; Dec 18, 2010 at 04:55 PM.
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Senior Member
Joined: Jul 2008
Posts: 58,557
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From: Long Beach Calimexifornia
I say you should run error code scans before replacing "anything". & a Seafoam treatment could only improve drivability.
Codes: https://www.f150forum.com/f10/how-re...es-obdi-10907/
Seafoam: https://www.f150forum.com/f33/how-se...-1991-a-31505/
Codes: https://www.f150forum.com/f10/how-re...es-obdi-10907/
Seafoam: https://www.f150forum.com/f33/how-se...-1991-a-31505/
Thread Starter
Senior Member
Joined: Nov 2010
Posts: 208
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From: Toms River,NJ
I say you should run error code scans before replacing "anything". & a Seafoam treatment could only improve drivability.
Codes: https://www.f150forum.com/f10/how-re...es-obdi-10907/
Seafoam: https://www.f150forum.com/f33/how-se...-1991-a-31505/
Codes: https://www.f150forum.com/f10/how-re...es-obdi-10907/
Seafoam: https://www.f150forum.com/f33/how-se...-1991-a-31505/
no codes are coming up...also did seafoam last week...
Senior Member
Joined: Jul 2008
Posts: 58,557
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From: Long Beach Calimexifornia