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Old 05-10-2016, 11:53 PM   #421
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Maybe it has some sort of intake vacuum leak?.

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Old 05-10-2016, 11:57 PM   #422
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Not sure where it would be, I'm going to try to follow my vac lines, it doesn't have very many with the EGR and EVAP being gone.




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Old 05-11-2016, 12:41 AM   #423
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It can even be a gasket, but since you say it runs good other than the idle problem it might not be it.

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Old 05-11-2016, 08:20 AM   #424
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Does it sound like a whirring noise from the CAI when it has the hanging idle?


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Old 05-11-2016, 10:03 AM   #425
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Like a whooping sound, low horn kinda sound


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Old 05-11-2016, 11:19 AM   #426
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Like a whooping sound, low horn kinda sound


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Mine did that a couple times with the bad IAC. Have you got your new one yet?

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Old 05-11-2016, 11:49 AM   #427
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Yea that's what I've been dealing with. I think it's a computer problem or tune related issue with the idle. I've replaced vacuum lines
Deleted the egr and many other things.
Checked anything and everything. Either that or a valve problem.
Pain in the a**
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Old 05-11-2016, 12:37 PM   #428
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I went to the local stealership and they looked up the correct IAC by my vin number and it was this style Click image for larger version

Name:	ImageUploadedByMustang Evolution1462988132.736474.jpg
Views:	84
Size:	56.3 KB
ID:	200826

Which is what is on the car now

However latemodelresto says that this is the style for my car, with the black vent
Click image for larger version

Name:	ImageUploadedByMustang Evolution1462988211.052953.jpg
Views:	80
Size:	270.1 KB
ID:	200827

So I'm not sure which is correct



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Old 05-11-2016, 08:36 PM   #429
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Now the damn car won't start, it's acting like the battery is dead, but when I get it everything comes on fine, no dim lights and the battery gauge even reads normal. I'm gonna take my multimeter to it in a bit to see actual voltage but this is just pissing me off. I know it's all little stuff but damn it lol


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Old 05-11-2016, 08:47 PM   #430
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Is the solenoid clicking?
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Old 05-11-2016, 08:48 PM   #431
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It's turning into an electrical nightmare lol.

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Old 05-11-2016, 08:53 PM   #432
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Working on some of the newer cars makes me miss the days of my Chevelle. Sure, I had two 750cfm Holly's on a high rise intake, but the car would run if they were not synced. If the distributor sent fire to the plugs in the correct senquence, and there was fuel the engine would run.

I am considering hunting down a big block Hemi to drop in my Ram instead of going with a fuel injected, computer operated, emission regulated nightmare.

I am pretty sure that is the route I would want to go if the engine in the Mustang dies. It would be interesting to open the hood and see a carbed engine between the fenders.

I think I can make more power for less money with an old style engine. It may only get 2mpg, but it would be easy to work on.

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Old 05-11-2016, 09:26 PM   #433
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This should help with the IAC issues hopefully. http://paladinmicro.com/pmicro.php#

If I remember right Cliffy mentioned something about the IAC making a "horn" type of noise when they started going bad. I'll see if I can't find some of his old posts.
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Old 05-11-2016, 09:54 PM   #434
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Originally Posted by keeney35 View Post
I went to the local stealership and they looked up the correct IAC by my vin number and it was this style Attachment 200826

Which is what is on the car now

However latemodelresto says that this is the style for my car, with the black vent
Attachment 200827

So I'm not sure which is correct



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The one they sold you is the right one for your car. The other one is 02 and down, some later model 01s had them too or that year was somewhat mixed thats why they look at the VIN I beleive to be sure.

But, I have the style of the one you posted the pic of from LMR on both my 03 and my 96 and it works on both. I know now that either will work, but Ive had the best luck with the one with the "breather" on the top verse the one that doesn't. But the one I had like the one you bought was not an OEM unit so it was junk.

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Old 05-11-2016, 10:19 PM   #435
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Is the solenoid clicking?

Sometimes it does. For the most part I just turn the key and it doesn't make a sound


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Old 05-11-2016, 10:20 PM   #436
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I checked all grounds and connections, even on the starter everything is tight.


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Old 05-11-2016, 10:27 PM   #437
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Working on some of the newer cars makes me miss the days of my Chevelle. Sure, I had two 750cfm Holly's on a high rise intake, but the car would run if they were not synced. If the distributor sent fire to the plugs in the correct senquence, and there was fuel the engine would run.

I am considering hunting down a big block Hemi to drop in my Ram instead of going with a fuel injected, computer operated, emission regulated nightmare.

I am pretty sure that is the route I would want to go if the engine in the Mustang dies. It would be interesting to open the hood and see a carbed engine between the fenders.

I think I can make more power for less money with an old style engine. It may only get 2mpg, but it would be easy to work on.

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Panther!! Is this you?! Jk

A lot of people put carb'd 5 liters in Mustangs. Just get a good 302 block, and build one. Probably do it on the cheap for sure. Ive actaully thought of doing this too, if one of mine blow at some point. Ive also kicked around the idea of finding a clean Fox body roller and build a 302 slowly, all "old school", maybe with a Holley fuel management system or maybe not. Seems to me after pricing it out you could have a 325 rwhp engine fairly cheap. You can also build an EFI 302 to be around 300 rwhp fairly cheap too, finding the right parts in junkyards, swap meets, CL, etc. Just need an E303 cam, GT40 heads/intake out of an Exploder or something similar, shorty headers, other bolt ons of course like exhaust, then move to suspension and weight reduction and you can have a mid to high 12 second car on the cheap. Im no expert on this of course as you can tell, but Ive looked into it some. It seems that the older push rod motors would be much easier for a novice like myself to "build" one. I have been thinking of building one on the side for some future car I dont have, get a cheap Harbor Freight engine stand and go to town, lol.

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Old 05-12-2016, 12:08 AM   #438
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Panther!! Is this you?! Jk

A lot of people put carb'd 5 liters in Mustangs. Just get a good 302 block, and build one. Probably do it on the cheap for sure. Ive actaully thought of doing this too, if one of mine blow at some point. Ive also kicked around the idea of finding a clean Fox body roller and build a 302 slowly, all "old school", maybe with a Holley fuel management system or maybe not. Seems to me after pricing it out you could have a 325 rwhp engine fairly cheap. You can also build an EFI 302 to be around 300 rwhp fairly cheap too, finding the right parts in junkyards, swap meets, CL, etc. Just need an E303 cam, GT40 heads/intake out of an Exploder or something similar, shorty headers, other bolt ons of course like exhaust, then move to suspension and weight reduction and you can have a mid to high 12 second car on the cheap. Im no expert on this of course as you can tell, but Ive looked into it some. It seems that the older push rod motors would be much easier for a novice like myself to "build" one. I have been thinking of building one on the side for some future car I dont have, get a cheap Harbor Freight engine stand and go to town, lol.

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Not sure who Panther is, but I have a junked 99 Mercury Mountaineer at my disposal. I'm sure there are parts there I can scavage.

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Old 05-12-2016, 11:18 AM   #439
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For the Mountaineer you can use the block, rotating assy, Heads and Intake although they'll be the less desirable P heads. You can use the Exploder distributorless ignition if you modify it to work but I've never messed with that. That is if you are 5.0 pushrod anyway.


As cheap and tunable as the 4.6 is now... I won't mess with a Ford pushrod ever again tbth. I like having a motor that doesn't leak or lift the heads off under boost or a big shot of nitrous and where I can get blocks for free vs paying $2500 for one that won't split open at 500hp.
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Old 05-12-2016, 11:34 AM   #440
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Tested battery voltage and its 12.5 so that's not the issue, I need to re work the block ground it's not the best.

As far as the IAC situation goes I'm still stumped.

I just pulled the intake off to see if maybe the throttle screw needs adjusted, there is definite slack in the throttle cable, not sure if that is the cause of anything tho
https://youtu.be/gmyLy-3P54c


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Old 05-12-2016, 11:46 AM   #441
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Okay I'm almost 100% sure it's the IAC, check this video out.

This is the sound I hear when I'm at a light and the rpms climb to 2200 at idle

https://youtu.be/-b22dpevYf8


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Old 05-12-2016, 12:19 PM   #442
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Your local stealership doesn't have one in stock right meow?
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Old 05-12-2016, 12:23 PM   #443
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They do but I'm not paying them 200$ for it when I can get the same motorcraft part on rockauto for 60$ lol


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Old 05-12-2016, 12:37 PM   #444
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It's a shame you're having these small problems that thing sounds suhweet!


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Old 05-12-2016, 12:41 PM   #445
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When does the new IAC get delivered?
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Old 05-12-2016, 12:56 PM   #446
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Hopefully soon lol


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Old 05-12-2016, 01:03 PM   #447
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For the Mountaineer you can use the block, rotating assy, Heads and Intake although they'll be the less desirable P heads. You can use the Exploder distributorless ignition if you modify it to work but I've never messed with that. That is if you are 5.0 pushrod anyway.


As cheap and tunable as the 4.6 is now... I won't mess with a Ford pushrod ever again tbth. I like having a motor that doesn't leak or lift the heads off under boost or a big shot of nitrous and where I can get blocks for free vs paying $2500 for one that won't split open at 500hp.
I don't care to mess with any pushrod engines. I find it easier to deal with cams. I personally get irritated with the computers.

I was a master locksmith when the PATS security system was installed by Ford. I hated the system then, and I hate it now.

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Old 05-12-2016, 01:04 PM   #448
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Tested battery voltage and its 12.5 so that's not the issue, I need to re work the block ground it's not the best.

As far as the IAC situation goes I'm still stumped.

I just pulled the intake off to see if maybe the throttle screw needs adjusted, there is definite slack in the throttle cable, not sure if that is the cause of anything tho
https://youtu.be/gmyLy-3P54c


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I'm waiting for Scotty to answer on this one. I am curious.

I know this build has kicked your butt, but for those of us reading through your experience, it has been an education.

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Old 05-12-2016, 06:24 PM   #449
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I can't wait to see some videos after you get everything situated and broken in!

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Old 05-12-2016, 06:31 PM   #450
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I've got in it a couple of times just to see what she will do, and I learned 2 things.

1. I need a good tire, it's got street tires now, if I get in it at any speed under 40 it breaks loose and the *** end kicks out.

2. This is a whole new animal compared to before the build


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Old 05-12-2016, 07:52 PM   #451
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Left the house an hour ago, now I'm getting ready to head back home and it won't start again lol I think the start solenoid is shot, sometimes I can hear it click sometimes I can't


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Old 05-12-2016, 08:54 PM   #452
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Yea it might be time for a new one. Sorry you're running into these problems man!


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Old 05-12-2016, 09:23 PM   #453
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I'm moving about this weekend so once I get my security deposit from my old apartment I'll order a new starter. Any specific brands better than another?


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Old 05-13-2016, 11:27 AM   #454
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I just get one from Rockauto.

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Old 05-20-2016, 11:55 PM   #455
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So I got all moved into my new place and car hauled back today 8hr tripClick image for larger version

Name:	ImageUploadedByMustang Evolution1463806403.962594.jpg
Views:	94
Size:	66.7 KB
ID:	201236Click image for larger version

Name:	ImageUploadedByMustang Evolution1463806417.534255.jpg
Views:	94
Size:	46.0 KB
ID:	201237


I was noticing something tho when I drive her.

I'm still not going over 3500rpm but when I do in like 1st and shift quick to 2nd it acts like it cuts out.

does that sound tune related? Does the same thing from 2nd to 3rd. Like if I'm shifting hard and getting right back in it as if I was racing. But I'm not revving high.


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