Harder to start...
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Member
Joined: Jan 2007
Posts: 18
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Harder to start...
Since I installed the tunes the truck takes a little more time to fire. It used to be that i could bump the starter and it would kick over and rev to 2K then settle into its idle. Now it seems I have to hold the key another second or so to get it started.
'02 5.4 auto
troyer 91 tunes
48K miles
stock plugs/cops
stock o2 sensors
I have heard form several "experts" that it could be any of the above. Any ideas?
'02 5.4 auto
troyer 91 tunes
48K miles
stock plugs/cops
stock o2 sensors
I have heard form several "experts" that it could be any of the above. Any ideas?
Last edited by ride-red; Oct 26, 2007 at 04:44 PM.
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
Could be several things.
Delayed buildup of adequate fuel pressure (weak pump or restriction) or a sticky IAC valve both come to mind.
It isn't the O2 sensors since they're not used at engine startup. None of the other things in your list are very likely, either.
Steve
Delayed buildup of adequate fuel pressure (weak pump or restriction) or a sticky IAC valve both come to mind.
It isn't the O2 sensors since they're not used at engine startup. None of the other things in your list are very likely, either.
Steve
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
A very dirty MAF Sensor could be throwing things off as well..
Dirty throttle body - sticky TB plate..
Most likley a little bit of everything that's been mentioned above..
Just clean it and change the fuel filter..
Dirty throttle body - sticky TB plate..
Most likley a little bit of everything that's been mentioned above..
Just clean it and change the fuel filter..
Last edited by jbrew; Oct 27, 2007 at 11:53 AM.
