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Old 08-04-2013, 02:29 PM   #1
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I got a 98 mustang gt auto has a noise coming from engine bay almost sounds like a air horn going off but it doesn't it while in part but when I'm driving down the high way my car will not get up and go it just takes it time and it also jerks

Only mods are CIA and full exhaust

And my exhaust sounds like it farting

I just had a problem with my spark plug blowing out had it rethread but the guy put in one motor craft plug and the rest are bosh platinum plugs

Also had to replace a vacuum hose due to dry rotting

Here a video
http://youtu.be/_mLWdVVgW9o
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Old 08-04-2013, 04:00 PM   #2
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Anybody... Help?
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Old 08-04-2013, 05:02 PM   #3
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Old 08-04-2013, 07:33 PM   #4
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Quote:
Originally Posted by Vmcgrath
I got a 98 mustang gt auto has a noise coming from engine bay almost sounds like a blow horn going off but it doesn't it while in part but when I'm driving down the high way my car will not get up and go it just takes it time and it also jerks

Only mods are CIA and full exhaust

And my exhaust sounds like it farting

I just had a problem with my spark plug blowing out had it rethread but the guy put in one motor craft plug and the rest are bosh platinum plugs

Also had to replace a vacuum hose due to dry rotting

Here a video
http://youtu.be/_mLWdVVgW9o
I swear I'm not trying to be funny or a smart *** or a dick or anything.but are u blowing a air horn behind the camera?? It sounds exactly like one
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Old 08-04-2013, 07:37 PM   #5
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Nope I pinky swear that the noise I'm trying to figure out it coming from my engine bay sound near the throttle body but I can't pin point it
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Old 08-04-2013, 07:43 PM   #6
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Sounds like the iac to me...how's your idle?
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Old 08-04-2013, 07:47 PM   #7
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Quote:
Originally Posted by Vmcgrath
Nope I pinky swear that the noise I'm trying to figure out it coming from my engine bay sound near the throttle body but I can't pin point it
Well it may have something to do with air since it sounds like a air horn? I'm not very good with stuff like that lol. Good luck man
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Old 08-04-2013, 07:49 PM   #8
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Originally Posted by NJstanger View Post
Sounds like the iac to me...how's your idle?
Thank you for giving me something to look into but the idle stutters and the rpm are jumpy it start up at one the goes down then up and down
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Old 08-04-2013, 08:29 PM   #9
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Could be a vacuum leak from one of the hoses or the manifold
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Old 08-04-2013, 08:33 PM   #10
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Could be a hose that is weak that collapses under load causing the noise. Press on all air hoses to look for weak spongy ones
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Old 08-04-2013, 09:04 PM   #11
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Originally Posted by Vmcgrath View Post

Thank you for giving me something to look into but the idle stutters and the rpm are jumpy it start up at one the goes down then up and down
Again sounds like an iac problem too me...my buddy tells me he had a similar noise(I never heard it), but changed his iac valve and noise has yet to return.
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Old 08-04-2013, 09:16 PM   #12
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Originally Posted by NJstanger View Post

Again sounds like an iac problem too me...my buddy tells me he had a similar noise(I never heard it), but changed his iac valve and noise has yet to return.
Okay I will do that sometime this week thanks for the advice

---------- Post added at 09:15 PM ---------- Previous post was at 09:12 PM ----------

Quote:
Originally Posted by Mgsgreystang View Post
Could be a vacuum leak from one of the hoses or the manifold
Thank you I will check that out as well

---------- Post added at 09:16 PM ---------- Previous post was at 09:15 PM ----------

Quote:
Originally Posted by Mfore33 View Post
Could be a hose that is weak that collapses under load causing the noise. Press on all air hoses to look for weak spongy ones
I just replace one hose because it was bad it like when ones bad then the all go bad
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