85 302 efi idle
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From: Dover AFB, DE
85 302 efi idle
does anyone know the stock idle rpm's? i know you shouldn't have to adjust it, but the previous owner did to compensate for bad sensors i've replaced and need to get it idling correctly.
thank's, mike
thank's, mike
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From: Virginia
When it's idling, you are supposed to be able to unplug the IAC motor, and the engine should slowly lose rpm and die.
If it keeps running, the idle is set too high. If it dies right away, the the idle stop is not turned in far enough.
You may want to tear the whole throttle body apart and clean it up, and the IAC passages, before trying to set it. Fuel injected engines are famous for the throttle body getting gummed up.
If it keeps running, the idle is set too high. If it dies right away, the the idle stop is not turned in far enough.
You may want to tear the whole throttle body apart and clean it up, and the IAC passages, before trying to set it. Fuel injected engines are famous for the throttle body getting gummed up.
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Joined: Jun 2003
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From: Atlanta Georgia
Perfict Idle is 640rpm.
1. Start engine
2. Warm engine to operating temp.
3. Remove the plug on the IAC.
4. Turn the throttle stop screw untill you reach 600rpm.
5. Turn off engine but place key back in on position.
6. Test the TPS. It should read .90, if not adjust it till it does.
http://fordfuelinjection.com/index.php?p=30
7. Reastart engine, is idle still at 600? If yes then continue to step 8. If not repeat 1-7 untill you have 600rpm idle with a .90 reading on the TPS.
8. Reconect IAC.
9. Idle should rise to around 640rpm.
10. Have a beer becouse your idle is now set.
1. Start engine
2. Warm engine to operating temp.
3. Remove the plug on the IAC.
4. Turn the throttle stop screw untill you reach 600rpm.
5. Turn off engine but place key back in on position.
6. Test the TPS. It should read .90, if not adjust it till it does.
http://fordfuelinjection.com/index.php?p=30
7. Reastart engine, is idle still at 600? If yes then continue to step 8. If not repeat 1-7 untill you have 600rpm idle with a .90 reading on the TPS.
8. Reconect IAC.
9. Idle should rise to around 640rpm.
10. Have a beer becouse your idle is now set.
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From: Atlanta Georgia
Originally Posted by Franklin2
Gacknar, where did you get that procedure?
I have read several diferant ways of doing it, thats the one that works the best in my experiance.
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From: Suffolk, VA USA
I tried it today...took apart the throttle body assembly, cleaned all the gunk out, replaced the IAC, and reset everything per Gaknar's post...worked like a charm...truck runs brand new. Or maybe it's just the beer.....
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From: Virginia
Originally Posted by Gacknar
Memory, experiance, and just a general understanding of how the system works.
I have read several diferant ways of doing it, thats the one that works the best in my experiance.
I have read several diferant ways of doing it, thats the one that works the best in my experiance.
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From: Atlanta Georgia
Originally Posted by Franklin2
Sounds like setting it that way leaves 40 rpm of control to the IAC.
Ford shop manuals say to set the base idle at 400rpm. I have found that in the real world setting it at 600rpm gives a little stall coushion to these older vehichles.
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From: Dover AFB, DE
Thanks for the replies, sorry I haven't replied back sooner(working 2 jobs leaves no time). I will give this a try once I get my hands on a tach and let you know how it works out for me.
Mike
Mike
