Straight-6 stalls when idling
New User
Joined: Aug 2002
Posts: 1
Likes: 0
From: Calais USA
Straight-6 stalls when idling
Hey-
I have a 1986 F-150 300 Straight-6 automatic, and it stalls when idling. So far I have gotten past this by shifting to neutral and giving it enough gas to keep it from stalling when I have to stay in one place for a certain amount of time, but it's still really irritating. I've been told I should up the idle speed, but that doesn't seem like a solution to the problem but just a way around it. Anyone know how I can get it to idle properly without stalling? I'm trying to do some work on my truck this summer and I'd like to get past this problem. Email reply would be appreciated.
Thanks,
--Dom
I have a 1986 F-150 300 Straight-6 automatic, and it stalls when idling. So far I have gotten past this by shifting to neutral and giving it enough gas to keep it from stalling when I have to stay in one place for a certain amount of time, but it's still really irritating. I've been told I should up the idle speed, but that doesn't seem like a solution to the problem but just a way around it. Anyone know how I can get it to idle properly without stalling? I'm trying to do some work on my truck this summer and I'd like to get past this problem. Email reply would be appreciated.
Thanks,
--Dom
Posting Guru
Joined: Jan 2001
Posts: 2,358
Likes: 3
From: Nebraska
Straight-6 stalls when idling
Your problem may be simply that the idle speed is set too low. I'm assuming you have the electronic feedback carb setup. First I'd check the codes to see if they can tell you anything that might be wrong. Then make sure the idle speed is set properly according to the emission sticker under the hood.
If that fails to help, the problem can be "fixed" (covered up) by setting the anti-diesel screw to 600-700 rpm instead of below 500 where it's supposed to be. The idle speed control motor at the back of the carb is supposed to control the correct idle speed with the engine running, then drop down on this screw after shutdown to keep the engine from dieseling. If, for some unknown reason, the ISC motor is retracting too far, you'll still have an idle instead of the "anti-diesel" speed.
Hope this helps (or even makes sense
)
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[font color="green"]1995 F-150 Supercab XLT 4x4 302 M5OD 8' bed [/font]31x10.50's
[font color="green"]1986 F-150 4x4 300 I6 NP435 [/font]Warn hubs, DeeZee bed caps, '96 XLT bench seat, new paint job
If that fails to help, the problem can be "fixed" (covered up) by setting the anti-diesel screw to 600-700 rpm instead of below 500 where it's supposed to be. The idle speed control motor at the back of the carb is supposed to control the correct idle speed with the engine running, then drop down on this screw after shutdown to keep the engine from dieseling. If, for some unknown reason, the ISC motor is retracting too far, you'll still have an idle instead of the "anti-diesel" speed.
Hope this helps (or even makes sense
)--------------
[font color="green"]1995 F-150 Supercab XLT 4x4 302 M5OD 8' bed [/font]31x10.50's
[font color="green"]1986 F-150 4x4 300 I6 NP435 [/font]Warn hubs, DeeZee bed caps, '96 XLT bench seat, new paint job
