Project GO FAST is now in progress!!!
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
Originally Posted by built54
I think ill check that tomorrow, but I have the tuner idle set at 980 in neutral, and i can get it to idle at 500, and 860 in drive, which actually idles at about 550-600, but it will die when i come to a stop if i dont touch the gas. I know its nothing serious, the engine runs smooth as can be, and has great oil pressure, im still happy
With that description it sounds like the IAC - typical IAC problem .. Can you set the tuner idle down any farther. You might be outside of parameters with that setting. - Normal settings 750 I believe..I'm not sure , but if your outside the margine , it might not know what to do.
Thread Starter
|
Senior Member
Joined: Jul 2006
Posts: 6,282
Likes: 1
From: Farmington, MO
hmm yeah i can, but i just turned it way up hoping it would idle... maybe now that i changed the wiring harness, ill reinstall my tune and set the idle in the low 700 range... ill try that b4 work, if its good, ill drive it to work, I really really want to.
Suspended
Joined: Mar 2006
Posts: 145
Likes: 0
sweet 
i like the idea of reloading the tune or a stuck IAC, especially if it sat for a long time before being used.
did you ever go through with the 2wd swap or is it still 4x4? haha if you had 4x4 high on and hammered it off a stop, you could launch forward and really suprise people
i like the idea of reloading the tune or a stuck IAC, especially if it sat for a long time before being used.
did you ever go through with the 2wd swap or is it still 4x4? haha if you had 4x4 high on and hammered it off a stop, you could launch forward and really suprise people
Thread Starter
|
Senior Member
Joined: Jul 2006
Posts: 6,282
Likes: 1
From: Farmington, MO
its 2x4 now, but I'm watching a set of 4.10s for the front, which im going to install when I get this whole thing fixed, no big deal, 4x4 would be very nice in the rain.
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
HEMI HUNTING Could be ( :
Yea I just replace my IAC a few weeks ago - replaced everthing on the TB and elbow - even the throttle body . It ran rough at idle - I was just telling this to someone else in another thread - My truck always idles smooth , never had a problem. But yea, it ran rough @ idle , it was jumpy . Well it fixed itself, I'm pretty sure it was the new IAC.
Could be ( :Yea I just replace my IAC a few weeks ago - replaced everthing on the TB and elbow - even the throttle body . It ran rough at idle - I was just telling this to someone else in another thread - My truck always idles smooth , never had a problem. But yea, it ran rough @ idle , it was jumpy . Well it fixed itself, I'm pretty sure it was the new IAC.
Last edited by jbrew; Oct 1, 2007 at 12:06 AM.
Senior Member
Joined: Jan 2005
Posts: 5,389
Likes: 0
From: Fort Worth,Tx
sounds like the MAF isnt plugged in and doing idle seek. couple be damaged wiring harness from sounds of ur descriptions. i was was around i could make u a new harness in about a day. since its one of my jobs at work in doing wiring harness finding breaks and fixing them on bigcommercial vacume clean out trucks. hope u figure it out man!
Technical Article Contributor
Joined: Oct 2005
Posts: 25,641
Likes: 19
From: MI
I was talking with Faster150 earlier - said he set his at 1100rpms @ idle thru the tuner and the motor idled as programmed - So I'm thinking it is indeed the IAC that's at fault here and your tuner settings should idle the motor to what you have set.
IAC's prolly just stuck from not being used, like "stopper" suggested above - Shoot , were yours is located , it's easy enough to get to real quick before work.. I would pull it off and with a small pair of needle nose pliers, maybe hemostats or a screwdriver would even work (careful with the screwdriver in there) - But with a little WD40, work the mechanicals inside the IAC a few times - make sure everthings moving in there - compressed air will force the lubricant into the right places - throw it back on, see if she idles..If not - the lightning set up must be so much different that you'll need to go another route.
Good Luck ..
IAC's prolly just stuck from not being used, like "stopper" suggested above - Shoot , were yours is located , it's easy enough to get to real quick before work.. I would pull it off and with a small pair of needle nose pliers, maybe hemostats or a screwdriver would even work (careful with the screwdriver in there) - But with a little WD40, work the mechanicals inside the IAC a few times - make sure everthings moving in there - compressed air will force the lubricant into the right places - throw it back on, see if she idles..If not - the lightning set up must be so much different that you'll need to go another route.
Good Luck ..
Last edited by jbrew; Oct 1, 2007 at 03:36 AM.
Senior Member
Joined: Feb 2007
Posts: 1,627
Likes: 0
From: South Carolina
That whine sounds aweaome
I agree with the IAC being messed up,mine did the same thing,let off the gas and it would die instantly.Is it off your motor or the take-off??
Headlights coming on with running lights,i dunno cheack for a loose ground.
Knock sensor do a search,tons of info from Bluegrass!!
It sounds like it's gonna fly
Take it easy until you break it in!!!
I agree with the IAC being messed up,mine did the same thing,let off the gas and it would die instantly.Is it off your motor or the take-off??
Headlights coming on with running lights,i dunno cheack for a loose ground.
Knock sensor do a search,tons of info from Bluegrass!!
It sounds like it's gonna fly
Take it easy until you break it in!!!
Last edited by Kevin24; Oct 1, 2007 at 04:06 AM.
Thread Starter
|
Senior Member
Joined: Jul 2006
Posts: 6,282
Likes: 1
From: Farmington, MO
yeah the maf is plugged in, i didnt even touch that wiring harness. Ill check that iac after work, I need to pull the intake off and replace that knock sensor, and it would be easier if i didnt drive it today, as bad as I want to
Senior Member
Joined: Feb 2004
Posts: 10,390
Likes: 10
Originally Posted by built54
yeah the maf is plugged in, i didnt even touch that wiring harness. Ill check that iac after work, I need to pull the intake off and replace that knock sensor, and it would be easier if i didnt drive it today, as bad as I want to
Lightnings don't use knock sensors - they may be present, but they are either not hooked up, and/or not enabled in the tune. Reason - the blower's mechanical transients are mistaken for knock and would cause the timiing to be pulled.
A look on the Lightning forum will confirm this - and it's one reason for spot-on tuning, fueling, A/F's and ample octane overhead - almost any detonation can be fatal because the PCM is out of that safety loop entirely.
Here's some info:
https://www.f150online.com/forums/sh...2&postcount=37
And posts 37 on up in BigTrucks' Lightning swap/buildup:
https://www.f150online.com/forums/sh...t=knock+sensor
My dumb guess here is it's the tunin' ....
Last edited by MGDfan; Oct 1, 2007 at 08:54 AM.
Senior Member
Joined: Jun 2005
Posts: 2,805
Likes: 2
From: NEVADA
Originally Posted by MGDfan
Not so fast.
Lightnings don't use knock sensors - they may be present, but they are either not hooked up, and/or not enabled in the tune. Reason - the blower's mechanical transients are mistaken for knock and would cause the timiing to be pulled.
A look on the Lightning forum will confirm this - and it's one reason for spot-on tuning and ample octane overhead - almost any detonation can be fatal because the PCM is out of that safety loop entirely.
My dumb guess here is it's the tunin' ....
Lightnings don't use knock sensors - they may be present, but they are either not hooked up, and/or not enabled in the tune. Reason - the blower's mechanical transients are mistaken for knock and would cause the timiing to be pulled.
A look on the Lightning forum will confirm this - and it's one reason for spot-on tuning and ample octane overhead - almost any detonation can be fatal because the PCM is out of that safety loop entirely.
My dumb guess here is it's the tunin' ....
https://www.f150online.com/forums/sh...t=knock+sensor