Replaced cracked intake manifold, now knocking at wot - MustangForums.com


Go Back   MustangForums.com > Ford Mustang Tech > 4.6L (1996-2004 Modular) Mustang
Search


4.6L (1996-2004 Modular) Mustang Technical discussions on 1996-2004 4.6 Liter Modular Motors (2V and 4V) within.

Replaced cracked intake manifold, now knocking at wot

Reply
 
 
 
Thread Tools Search this Thread
Old 08-27-2014, 10:41 PM   #1
kast1376
3rd Gear Member
 
kast1376's Avatar
 
Join Date: Jun 2006
Vehicle: 2004 GT
Location: Sacramento
Posts: 658
Johnny-Goonhand
Send a message via Yahoo to kast1376
Default Replaced cracked intake manifold, now knocking at wot

Need some educated guesses here! Recently replaced the intake manifold, and now when I go WOT, I get knocking. No knocking otherwise in any gear at any speed or at idle.

Any ideas?
__________________

Quote:
Originally Posted by Margarita Girl View Post
I like happy endings. Just saying.
LM1s, MGW, MM subframes and CC, H&R SS, Blues, Bassani Catted X, 13" brakes, 3.73 gears
kast1376 is offline   Reply With Quote
Old 08-31-2014, 02:46 PM   #2
JC316
4th Gear Member
 
JC316's Avatar
 
Join Date: May 2009
Vehicle: 1997 Cobra
Location: DFW, TX
Posts: 1,916
Default

Why did you have to change the intake? Best guess is that you have a vacuum leak that's leaning you out and causing detonation.
__________________
1992 Corvette M6
Guide to installing a Mark VIII engine in a 96+GT
JC316 is offline   Reply With Quote
Old 08-31-2014, 04:56 PM   #3
bluebeastsrt
6th Gear Member
 
bluebeastsrt's Avatar
 
Join Date: Jun 2006
Vehicle: 1995 mustang GT
Location: Jersey
Posts: 11,392
ItsUrFuneral
Default

Vacuum leak! End thread.
__________________
bluebeastsrt is offline   Reply With Quote
Old 08-31-2014, 08:34 PM   #4
kast1376
3rd Gear Member
 
kast1376's Avatar
 
Join Date: Jun 2006
Vehicle: 2004 GT
Location: Sacramento
Posts: 658
Johnny-Goonhand
Send a message via Yahoo to kast1376
Default

The intake cracked where the plastic joins with the aluminum cross over. Will start looking for a vac. Leak somewhere. Thanks guys!
__________________

Quote:
Originally Posted by Margarita Girl View Post
I like happy endings. Just saying.
LM1s, MGW, MM subframes and CC, H&R SS, Blues, Bassani Catted X, 13" brakes, 3.73 gears
kast1376 is offline   Reply With Quote
Old 08-31-2014, 08:37 PM   #5
99GTvert
is my username.
 
99GTvert's Avatar
 
Join Date: May 2006
Vehicle: 1
Location: Earth
Posts: 12,998
well, its getting cold outside again...****in reached down to the 40s the other day.  almost can't wait for the snowy stuff............................almost i don't have a twitter account nor have i ever been to a twitter web page (update: i have), but if i ever did decide to take the plunge i will let you know by posting it in this awesome little box of text (update: not really)! i like tacos lol...though between crunchy tacos and soft tacos i cannot really say which one is better.  sometimes, the mess a crunchy taco leaves behind is a little annoying while the soft taco just doesn't have the same taste... cake is so much better than pie no, srsly.  **** pie. ****ing
Default

That sucks. Did you use new gaskets for the intake? All your hoses plugged in? Is the new intake itself alright?
__________________
99GTvert is online now   Reply With Quote
Old 08-31-2014, 08:49 PM   #6
uberstang1
Chupacabra
 
uberstang1's Avatar
 
Join Date: Jul 2004
Vehicle: 1997 Mustang GT, 2002 F150 XLT 4x4 Triton
Location: wilkes-barre PA
Posts: 9,596
MustangSVT97r
Send a message via AIM to uberstang1 Send a message via Yahoo to uberstang1
Default

check the new intake for cracks as well, if u have acces to a vacum smoker thats your easiest way to find the leak.
__________________
Back under the knife, 04 iron block, 04 9 thread db casting 4v heads, blower cams, procharger f1a, meth, viper spec t56, team z suspension, cages, etc etc etc.
SKELETON CREW RACING
uberstang1 is offline   Reply With Quote
Old 09-01-2014, 02:08 AM   #7
kast1376
3rd Gear Member
 
kast1376's Avatar
 
Join Date: Jun 2006
Vehicle: 2004 GT
Location: Sacramento
Posts: 658
Johnny-Goonhand
Send a message via Yahoo to kast1376
Default

Quote:
Originally Posted by 99GTvert View Post
That sucks. Did you use new gaskets for the intake? All your hoses plugged in? Is the new intake itself alright?
All new gaskets, all hoses plugged in.

Uber, what is a vac. Smoker?

Edit: I wish I had access to a smoker! I really hope the intake isn't f%#ing cracked. If it is hopefully AM will replace it.

It's gonna be hard to track down. There is no issue at all until WOT, so I don't think the standard carb cleaner check will work.
__________________

Quote:
Originally Posted by Margarita Girl View Post
I like happy endings. Just saying.
LM1s, MGW, MM subframes and CC, H&R SS, Blues, Bassani Catted X, 13" brakes, 3.73 gears

Last edited by kast1376; 09-01-2014 at 02:17 AM.
kast1376 is offline   Reply With Quote

 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Exhaust Tick/Click Spiral534 4.6L (1996-2004 Modular) Mustang 6 10-06-2015 04:31 PM
02' GT Convertible, Need help choosing intake manifold. Calizic 4.6L (1996-2004 Modular) Mustang 5 08-28-2015 01:46 PM
intake manifold gasket soulcaliber39 2005-2014 Mustangs 1 08-26-2015 03:26 PM
1994-2004 Owner's, ENTER for your chance to WIN a new COWL for your Mustang!! Steve@CJPP CJ Pony Parts 1 08-19-2015 08:52 PM
Need Help Diagnosing Have Codes (Confused) djbigskrilla 2005-2014 Mustangs 13 08-11-2015 12:59 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

 

All times are GMT -5. The time now is 04:22 AM.



This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company