werid idle

sivart · June 17th, 2007, 10:48 PM

well i did the whole reset your idle.......wow that was dirty :wink and now when ill rev it up it will stop at 1100ish for a couple seconds and drop to idle around 800. and when im driving and put it in to neutral then coast to a stop, it wont go to idle until im stoped. now is it sposed to be like this? or what could i do....

TENGRAM · June 17th, 2007, 11:03 PM

Originally Posted by sivart

well i did the whole reset your idle.......wow that was dirty :wink and now when ill rev it up it will stop at 1100ish for a couple seconds and drop to idle around 800. and when im driving and put it in to neutral then coast to a stop, it wont go to idle until im stoped. now is it sposed to be like this? or what could i do....

its supposed to do that to an extent, but it sounds like your idle is still set a little too high.

sivart · June 17th, 2007, 11:09 PM

i have an lunati cam - its like the ford e303.

TENGRAM · June 18th, 2007, 12:38 AM

Originally Posted by sivart

i have an lunati cam - its like the ford e303.

cool. it should be no problem then to get the idle down to 672rpm, which BTW is the target rpm for the ECM. anytime you set the idle higher than that you will have idle instability issues because the ECM will "fight" to lower it. if it won't idle at 672 with a mild cam there are likely other problems that need to be addressed. timing comes to mind, but also vacuum leaks and issues with EFI components could cause that effect.

jjperl · October 1st, 2008, 10:46 PM

I'm having the same rolling idling issue with my 94 Cobra. What EFI components could cause this effect? Also, because of the cam, I don't think I can set the idle below 800 rpm without it running really rough.

Also, when I start the car when it is cold, it surges violently for about a minute. When the car is all warmed up when I start it, it doesn't surge.. The dude I bought the car from said it has a "closed circuit tune," or something to that effect and it will do that. Does this sound right? The cobra is pretty heavily modified.

other than that, the car runs really well.

any help would be greatly appreciated.

Originally Posted by TENGRAM

cool. it should be no problem then to get the idle down to 672rpm, which BTW is the target rpm for the ECM. anytime you set the idle higher than that you will have idle instability issues because the ECM will "fight" to lower it. if it won't idle at 672 with a mild cam there are likely other problems that need to be addressed. timing comes to mind, but also vacuum leaks and issues with EFI components could cause that effect.

93hatch · October 1st, 2008, 10:55 PM

its supposed to idle a lil higher till you stop, keeps vacuum high enough so ur brakes keep working and so the car wont die, my 93 does it, my 94 did it

jjperl · October 2nd, 2008, 12:16 AM

It's really supposed to idle around 11-1,200 rpm until a complete stop? Just seems kinda high.

lone5oh · October 2nd, 2008, 12:27 AM

i have been learned i been putting my idle at 1000 in park, ill fix that. i learned something new.

matt

93hatch · October 2nd, 2008, 01:33 AM

Originally Posted by jjperl

It's really supposed to idle around 11-1,200 rpm until a complete stop? Just seems kinda high.

thats what mine does but it idles kinda high normally so the increase is just based off that, since ive put my cam n shit it doesnt really idle higher when ur slowing down and you can feel the pedal get firmer under ur foot and its harder to brake

Hunt_chevs · October 2nd, 2008, 01:41 PM

they all have the wierd idle coming up to a stop.. when mine is stopped it idles flawlessly(after i did the idle reset) at about 650rpms,. now if im coasting to a stop it will not be at 650 it be around 900 ish, with a slight fluctuation.

June 17th, 2007, 10:48 PM	#1
sivart Regular Join Date: Feb 2007 Location: middle GA Posts: 301 iTrader: 0 reviews	werid idle well i did the whole reset your idle.......wow that was dirty :wink and now when ill rev it up it will stop at 1100ish for a couple seconds and drop to idle around 800. and when im driving and put it in to neutral then coast to a stop, it wont go to idle until im stoped. now is it sposed to be like this? or what could i do.... __________________ I just read an article about the dangers of drinking ... And it scared the crap out of me. So that's it............... After today, NO MORE READING.

June 17th, 2007, 11:09 PM	#3
sivart Regular Join Date: Feb 2007 Location: middle GA Posts: 301 iTrader: 0 reviews	i have an lunati cam - its like the ford e303. __________________ I just read an article about the dangers of drinking ... And it scared the crap out of me. So that's it............... After today, NO MORE READING.

October 1st, 2008, 10:55 PM	#6
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	its supposed to idle a lil higher till you stop, keeps vacuum high enough so ur brakes keep working and so the car wont die, my 93 does it, my 94 did it __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

October 2nd, 2008, 01:41 PM	#10
Hunt_chevs Hardcore Enthusiast 2002 Gt Not Slow Join Date: Aug 2007 Location: SJ-CA, 50-ft elev. Posts: 1,649 iTrader: 1 reviews	they all have the wierd idle coming up to a stop.. when mine is stopped it idles flawlessly(after i did the idle reset) at about 650rpms,. now if im coasting to a stop it will not be at 650 it be around 900 ish, with a slight fluctuation. __________________ 2k2 Gt Eibach pro kit, bbk cold air, exhaust, 4.10s, 6k hid's

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October 2nd, 2008, 12:16 AM	#7
jjperl Newbie Join Date: Sep 2007 Posts: 19 iTrader: 0 reviews	It's really supposed to idle around 11-1,200 rpm until a complete stop? Just seems kinda high.

October 2nd, 2008, 12:27 AM	#8
lone5oh Regular 1984 FORD MUSTANG GT Join Date: Aug 2007 Location: Summerville, SC Posts: 109 iTrader: 0 reviews	i have been learned i been putting my idle at 1000 in park, ill fix that. i learned something new. matt

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werid idle

werid idle

Re: werid idle