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Discussion Starter #1
I got this from another site but, it was never answered. The question is this the correct sequence to set the idle on a T-Bird 5.0 or is there something missing ? Also, those with a E-cam, what does your car idle at in Park and Drive ? thanks

) Open the bypass screw as far as I can
2) Disconnect the IAC connector
3) Adjust the set screw until I get the idle RPM I want
4) Reset the TPS voltage
 

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I was looking for the same info...here's some instructions that seem more complete. I am going to use this procedure but I haven't as of yet. BTW, it doesn't mention setting the TPS, but I'm sure it's assumed. Also, the idle speeds seem a little low, but there may be a reason...anyone have any thoughts on that? The factory P3M wants to keep idle at 680 drive and 840 neutral...

Setting the idle, the correct way

Begin with a cold vehicle. The idea here is to get the car to a firm cold idle with enough airbleed capacity left in the idle circuit for IAC adjustment.

The idle stop should be set first. Back out the idle stop screw, away from the bell crank arm, until about 1/2 turn past the point where it no longer makes contact (blade fully closed). Using an 0.010" feeler guage, tighten until gauge just drags between screw and bell crank arm. Remove feeler gauge. Tighten screw exactly 1 1/2 turns. If the screw is very loose, put a drop of locktite or silicone on it, so it doesn't work out of adjustment.

Now remove the connector to the Idle Air Controller (IAC) just on the other side of the throttle body. Start the car and allow to warm for 2 minutes. Give a small "blip" to let it settle. If it is having a hard time staying running you may have to get an assistant until you can get to the front of the car. Now open or close the air bleed screw (CCW opens) next to the IAC until the car idles at 575 to 600 rpm. For guys with aftermarket cams and an EEC tuner, you might want to idle a bit more briskly, say 650 to 675.

Turn off the car. Now count the number of turns clockwise to close on the idle air bleed screw. If it falls between 1/2 and 2, it's okay, now reverse it out the same number of turns. Log the number somewhere in case you need it for the future. Reconnect the IAC. You are done.

If the air bleed screw is above 2 turns, it's a good idea to tighten the idle stop screw another 1/2 turn, then repeat the idle setting. If it is below 1/2 turn, then loosen the idle stop screw by 1/4 to 1/2 a turn, and repeat the idle setting. Be sure to put another drop of silicone rtv on the stop screw if it was disturbed. Reconnect the IAC. You are done.
 

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Discussion Starter #3
Thanks, BTW, your the one i copied my list from the MTC site. Thanks again for the idle set intructions.
 

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Ahh yes, I thought that sounded familiar...I've been looking for that info for awhile. I found the above artice in a thread from the EEC-Tuner group...not sure exactly who wrote it though, but it seems pretty complete. Whoever gets around to doing it first, please post your results...tx

Oh, I don't have an E cam, but I'm setting mine where it likes to idle @ 900 (hardware and software). Your results may vary, just set it as low as you can before it stumbles or has any other problems. Depends on the combo...
 

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Discussion Starter #5
I will let you know next week for sure. My car is having some idle problems. For one thing the rpm's dont come down to quickly when you let of the gas, almost like cruise control is on. Also, seems to be ildeing high, 1000 in park and 750 in drive. the TPS is below .1 so hopefully the idle can be reset and the hangling idle will stop
 

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I don't believe it will fix the hanging idle...that is controlled by the DASHPOT_DECREMENT_RATE in the EEC...you will need a tuner or chip to increase the decrement rate. That is one of the things I'll be working on as well, once I get my idle surging worked out...
 

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Discussion Starter #7
Yup, these intructions and procedures seem to work just fine. Park idle is 900rpm and drive idle is a little less than 750rpm. The high idle condition is still there but, not nearly as bad as before.
 

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Thanks for posting your results...once I get some parts I'm waiting on I'll adjust mine as well and post.
 
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