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Old 06-04-2014, 10:38 AM   #1
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Do I have an aftermarket intake? pics

I have been chasing down a rough and gritty feeling in my engine since I got it.....It runs fine and reliable (knock on wood), but doesnt seem to put down the acceleration that its supposed to. I have an old thread about it here:

My GT is slow and rough. is that normal?

Anyway, looking at my intake manifold, it doesnt look like any that I see on Google Images. It appears to follow the PI style, but it has different molding marks and some sharper angles and stuff and I am concerned that it is some cheap aftermarket unit.

Can anyone tell me if its stock or not?

Plus, there is one loose bolt that leads me to believe it has been removed at one point.
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Old 06-04-2014, 10:40 AM   #2
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its an 02 GT btw.
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Old 06-04-2014, 10:54 AM   #3
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When I got the car, it had problems starting reliably and idleing reliably and also surged alot.

I tuned it up with the following:
Spark plugs
COPS
TPS
cleaned MAF
EGR
cleaned IAC
removed and cleaned TB and plenum
air filter
fuel filter
PCV and hose leak
OHM specd injectors (all good)
tranny flush and DR. Tranny addative
3 step injector cleaner and a couple bottles of Techron
Mobil 1 full synthetic and Fram filter

It now runs and starts consistantly, no more surges and ~23 mpg during daily commute.

But during medium throttle at take off, it still feels gritty until about 3,000 rpm, then it smooths out. Does this in 1st and 2nd.

Its smooth at light acceleration and WOT. only gritty during medium acceleration.
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Old 06-04-2014, 11:04 AM   #4
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As you know, the plastic intake on these cars is the weak point. They perform well but every one of them needs to be replaced at some point.
Dorman and Ford are the two big manufacturers so it's more than likely one of the two.
See if you can find any identifying marks on it.
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Old 06-04-2014, 11:27 AM   #5
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right on. thanks.

I looked up Dorman. Its pretty obvious thats what I have based on the pics. Is that a decent intake? as good as the oem?
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Old 06-04-2014, 11:42 AM   #6
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Ok. after reading about it, it looks as is this may be where my performance issues are coming from. looks like a new Ford intake is now on my "to do" list.
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Old 06-04-2014, 11:47 AM   #7
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Dorman has QC problems with those manifolds.
Some are better than others...
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Old 06-04-2014, 11:50 AM   #8
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Thanks for the help. I will be replacing this garbage intake, but I gotta wait for the funds to allow it. Currently self-building a pool in my backyard.
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Old 06-04-2014, 11:51 AM   #9
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Holy crap!
Underground?
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Old 06-04-2014, 11:55 AM   #10
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Quote:
Originally Posted by straybullitt View Post
Holy crap!
Underground?
ya. mostly. Im a cheap *** and I dont like to pay people for something I can physicaly do myself. I own a Bobcat, so I can do it all, but its very time consuming.
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Old 06-04-2014, 12:01 PM   #11
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For FA and others, heres a pic of the Ford PI intake vs the Dorman

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Old 06-04-2014, 12:03 PM   #12
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lol gritty?
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Old 06-04-2014, 12:04 PM   #13
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reviews of the Dorman state restricted flow, obstructed flow, and loss of performance. These are some of the things I've been experiencing with my GT since I got it.

---------- Post added at 12:04 PM ---------- Previous post was at 12:03 PM ----------

Quote:
Originally Posted by FullyAutomatic View Post
lol gritty?
Haha! I think so... take a look at yours FA
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Old 06-04-2014, 12:06 PM   #14
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I'll bet it's time consuming... It even takes the pool contractors a while to complete the job.
I was a general contractor for most of my career and that is one of the very few aspects of construction that I never messed with, aside from repairing tiles, etc. on existing pools.

Good for you Jeff!
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Old 06-04-2014, 12:10 PM   #15
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Quote:
Originally Posted by straybullitt View Post
I'll bet it's time consuming... It even takes the pool contractors a while to complete the job.
I was a general contractor for most of my career and that is one of the very few aspects of construction that I never messed with, aside from repairing tiles, etc. on existing pools.

Good for you Jeff!
Ha! Thanks. Im a heavy equipment operator by trade (backhoes and bulldozers, etc.) I build Chicago roads, so a pool is a small task in comparison, but Im doing it alone, in my spare time.
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Old 06-04-2014, 12:10 PM   #16
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I just checked.. I guess mine is a Dorman -_-
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Old 06-04-2014, 12:11 PM   #17
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Straubullitt I think Jefx is doing it red neck style lol
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Old 06-04-2014, 12:44 PM   #18
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Straubullitt I think Jefx is doing it red neck style lol
You mean like the "cement pond" that the Clampett's had on the Beverly Hillbilly's?


Jeff strikes me as the type of person that will pull this off no problem...

It will be interesting to see if the Ford manifold makes a noticeable difference.
There is another, slightly more expensive, option for you guys... The Edelbrock Victor jr. It's all aluminum. $400.
I don't know if it flows twice as good though.
Maybe Scotty will chime in and give an opinion on it...
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Old 06-04-2014, 12:49 PM   #19
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lol actually its on clearance for 300...
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Old 06-04-2014, 01:42 PM   #20
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Quote:
Originally Posted by straybullitt View Post
You mean like the "cement pond" that the Clampett's had on the Beverly Hillbilly's?


Jeff strikes me as the type of person that will pull this off no problem...

It will be interesting to see if the Ford manifold makes a noticeable difference.
There is another, slightly more expensive, option for you guys... The Edelbrock Victor jr. It's all aluminum. $400.
I don't know if it flows twice as good though.
Maybe Scotty will chime in and give an opinion on it...
Haha . ya. Im a bit of a redneck....literally. I rock a sweet farmer tan from being outside all the time lol! I promised the wife I'd have the pool done by June 1st, but the weather has set me back a couple weeks.

Id like to swap manifolds now, just for experiment sake, but the wife would kill me if I started another project. I have so many little things going on, that my Mustang "funds" are really more about time than money. I will get around to the intake sometime, hopefully before the end of summer.

FA, I am really interested if this would fix your "gritty" issue. If u decide to do it, please keep us posted...

Here's the manifold Straybullitt is talking about... It's $304.99 right now

Edelbrock Victor Jr. EFI Mustang Intake Manifold 28385 (99-04 GT) - Free Shipping
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Old 06-04-2014, 01:45 PM   #21
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Gwah? Eddy intake is good for a boosted or bigger cube app on a stock 2V you will pick up a little top end that the cams really can't make use of and you'll lose bottom end which the 2V doesn't have enough of to begin with. You also have to buy new fuel rails for it to work. Replacement PI intake from LRS or AM for $215 is your best bet. Get Fel pro gaskets, not the ones on AM. Torque is 22ft lbs for those bolts and google the bolt pattern on how to tighten.
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Old 06-04-2014, 01:47 PM   #22
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Quote:
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Gwah? Eddy intake is good for a boosted or bigger cube app on a stock 2V you will pick up a little top end that the cams really can't make use of and you'll lose bottom end which the 2V doesn't have enough of to begin with. You also have to buy new fuel rails for it to work. Replacement PI intake from LRS or AM for $215 is your best bet. Get Fel pro gaskets, not the ones on AM. Torque is 22ft lbs for those bolts and google the bolt pattern on how to tighten.
Thanks scotty
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