SLOWLX Posted February 5, 2012 Report Share Posted February 5, 2012 Cant figure why its idleing like this I cleaned the Mass Sensor and Idle control valve and checked No vacum Leaks Rpm keep jumpin up and down and its seems when its warmed up it runs fine(at the end of the video) Any ideas? Only way i could post a video http://mail.aol.com/35412-111/aol-6/en-us/mail/get-attachment.aspx?uid=73460&folder=Inbox&partId=1&saveAs=IMG_0058.MOV Mods include gt40 motor DSS Stroker kit crane roller rockers b303 cam underdrive pullies bbk cold air intake Quote Link to comment Share on other sites More sharing options...
Browning Posted February 5, 2012 Report Share Posted February 5, 2012 just because you cleaned them doesn't mean they're in working order Quote Link to comment Share on other sites More sharing options...
mjrsplat Posted February 5, 2012 Report Share Posted February 5, 2012 just because you cleaned them doesn't mean they're in working order This. My vote is for the iacv Quote Link to comment Share on other sites More sharing options...
twistedfocus1647545489 Posted February 5, 2012 Report Share Posted February 5, 2012 Can't play the video but I'm guessing bad MAF or hard to find leak. What MAF is on the car? Quote Link to comment Share on other sites More sharing options...
SLOWLX Posted February 5, 2012 Author Report Share Posted February 5, 2012 Can't play the video but I'm guessing bad MAF or hard to find leak. What MAF is on the car? Stock But i did notice it sounds like the air filter is trying to suck in air but it always stalls out out when you first start it up Quote Link to comment Share on other sites More sharing options...
twistedfocus1647545489 Posted February 5, 2012 Report Share Posted February 5, 2012 Stock But i did notice it sounds like the air filter is trying to suck in air but it always stalls out out when you first start it up The only spare MAF I have is calibrated for 24 pound injectors. Maybe someone has a stock one laying around you could swap in. May not be the issue but its super easy to rule out that way. A replacement IAC is pretty cheap if you want to start throwing parts at it. Quote Link to comment Share on other sites More sharing options...
Browning Posted February 5, 2012 Report Share Posted February 5, 2012 This. My vote is for the iacv same here, especially since it's a ford Quote Link to comment Share on other sites More sharing options...
SLOWLX Posted February 5, 2012 Author Report Share Posted February 5, 2012 Ok here i uploaded it on You tube Quote Link to comment Share on other sites More sharing options...
twistedfocus1647545489 Posted February 5, 2012 Report Share Posted February 5, 2012 Ok here i uploaded it on You tube Have you ever set the TPS voltage? Probably also worth checking if not. Should be under a volt. Quote Link to comment Share on other sites More sharing options...
SLOWLX Posted February 5, 2012 Author Report Share Posted February 5, 2012 Have you ever set the TPS voltage? Probably also worth checking if not. Should be under a volt. Just got the car last year So No Quote Link to comment Share on other sites More sharing options...
twistedfocus1647545489 Posted February 5, 2012 Report Share Posted February 5, 2012 Just got the car last year So No I'd absolutely check and set it. Likely not the issue but should be done. It's often overlooked. I usually shoot for .98 volts. You can probably find plenty of tutorials online. It's easy. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted February 6, 2012 Report Share Posted February 6, 2012 See above. Idle just needs adjusted. What throttle body? Quote Link to comment Share on other sites More sharing options...
Browning Posted February 6, 2012 Report Share Posted February 6, 2012 Correct me if I'm wrong but why would a throttle bodied vehicle ever need the idle adjusted? Wouldn't that be a band aid of sorts? I was under the impression you never have to adjust idle on a throttle body. Idle issues would be something else, sensor, etc. Quote Link to comment Share on other sites More sharing options...
gbracing81 Posted February 6, 2012 Report Share Posted February 6, 2012 Correct me if I'm wrong but why would a throttle bodied vehicle ever need the idle adjusted? Wouldn't that be a band aid of sorts? I was under the impression you never have to adjust idle on a throttle body. Idle issues would be something else, sensor, etc. Agreeg-IMHO Quote Link to comment Share on other sites More sharing options...
twistedfocus1647545489 Posted February 6, 2012 Report Share Posted February 6, 2012 (edited) Correct me if I'm wrong but why would a throttle bodied vehicle ever need the idle adjusted? Wouldn't that be a band aid of sorts? I was under the impression you never have to adjust idle on a throttle body. Idle issues would be something else, sensor, etc. Larger cams often dictate a higher idle speed just as they would in a carbureted application. In the case of an EFI car, or specifically this type where it's still a mechanical adjustment, not controlled by the ECU. You simply turn the stop screw in to set it to the desired RPM but you need to then readjust the TPS (people seem to forget the latter). A B303 isn't really that big of a cam but it does have a pretty narrow lobe separation causing enough overlap that I find the engine to be more drivable with a bump to about 850 RPM idle speed. That said, I doubt the idle speed itself is his issue in this case, just that the TPS may have been improperly set along the line somewhere. Edited February 6, 2012 by twistedfocus phrasing Quote Link to comment Share on other sites More sharing options...
Browning Posted February 6, 2012 Report Share Posted February 6, 2012 I know how to adjust it. I've just always been told it's never needed on a throttle body vehicle no matter what's going on. Quote Link to comment Share on other sites More sharing options...
SLOWLX Posted February 6, 2012 Author Report Share Posted February 6, 2012 i adjusted the idle speed and it seems it worked but it only acts up when the engine is cold so Ill have to see Tomorrow B303 cam is decent one i mean you can hear it at idle and it lopes pretty good Im happy with it Quote Link to comment Share on other sites More sharing options...
Browning Posted February 6, 2012 Report Share Posted February 6, 2012 lol you done goofed Quote Link to comment Share on other sites More sharing options...
SLOWLX Posted February 6, 2012 Author Report Share Posted February 6, 2012 lol you done goofed This is what i did http://www.muscularmustangs.com/idlereset.php Quote Link to comment Share on other sites More sharing options...
schmuckingham Posted February 6, 2012 Report Share Posted February 6, 2012 Welcome to the world of a cammed 302, hell my stock 302 does that. Wouldnt worry about it. On a fox if you change throttle bodies the voltage needs to be in a certain range like .8-1 volt with the throttle body at rest. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted February 6, 2012 Report Share Posted February 6, 2012 i adjusted the idle speed and it seems it worked but it only acts up when the engine is cold so Ill have to see Tomorrow B303 cam is decent one i mean you can hear it at idle and it lopes pretty good Im happy with it But all of the other guys said that wouldn't work........... How many of you guys giving advice have ever owned a Fox body Mustang? Just curious. Quote Link to comment Share on other sites More sharing options...
DKilbourne Posted February 6, 2012 Report Share Posted February 6, 2012 Correct me if I'm wrong but why would a throttle bodied vehicle ever need the idle adjusted? Wouldn't that be a band aid of sorts? I was under the impression you never have to adjust idle on a throttle body. Idle issues would be something else, sensor, etc. I wonder why they come with the ability to adjust them then? How is it a band aid if you adjust idle speed slightly and it keeps it from stalling? Quote Link to comment Share on other sites More sharing options...
Browning Posted February 6, 2012 Report Share Posted February 6, 2012 But all of the other guys said that wouldn't work........... How many of you guys giving advice have ever owned a Fox body Mustang? Just curious. I wonder why they come with the ability to adjust them then? How is it a band aid if you adjust idle speed slightly and it keeps it from stalling? can't provide actual answers, retorts to assuming we don't know what we're doing. I'm not looking to argue. I asked a question. It's a band aid considering it shouldn't need messed with and there's an underlying problem, obviously. Quote Link to comment Share on other sites More sharing options...
Clifford Automotive Posted February 6, 2012 Report Share Posted February 6, 2012 Apparently I need to log back into AOL mail? Sorry can't help. Quote Link to comment Share on other sites More sharing options...
twistedfocus1647545489 Posted February 6, 2012 Report Share Posted February 6, 2012 How many of you guys giving advice have ever owned a Fox body Mustang? Just curious. I have had a couple. They only ran on jack stands and unicorn pee, so I may not be a good technical resource. :gabe: Seriously though. It's hard to diagnose a car via Internet so the more people brainstorming the merrier I say. Wrong or right it gets you thinking critically. Quote Link to comment Share on other sites More sharing options...
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