Installed Accufab 75mm TB and Plenum, but now..

Smeech

Member

Feb 28, 2004

148

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16

Fremont, Ca

Nov 21, 2004

#1

• Nov 21, 2004

• #1

I installed the accufab 75mm TB and Plenum on my car... it went pretty smooth, sounds good... changed the tone. It idles just fine, a little higher than before (maybe 100-150 rpm higher, around 700) and runs really smooth.

However, it has a diesel-like sound to it when idling. It's only really noticeable when I have the hood open, and I'm paranoid about the "piston slap" problem... does the TB/Plenum create a raspier sound under the hood?

It wasn't making that sound before the swap... We hand tightened the plenum but didn't overtighten them IMO..

 

Beau

Founding Member

Jan 29, 2000

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San Diego

Nov 21, 2004

#2

• Nov 21, 2004

• #2

did you leave a vacuum line disconnected or something? i had both on my 03 GT and never had it idle like a diesel motor.

 

Smeech

Member

Feb 28, 2004

148

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16

Fremont, Ca

Nov 21, 2004

#3

• Nov 21, 2004

• #3

I don't think so.. but I'll double check cracks/missed vacuum lines. Is it possible I don't have the Plenum tightened enough? It's tight, but I didn't want to overtighten it...

I left the stock o-ring on the lower intake manifold when I put on the plenum.. should I just remove it?

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

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Nov 21, 2004

#4

• Nov 21, 2004

• #4

no, you leave the stock o ring in... I had the same problem, theres a line on the back side I didn't have pushed in all the way and it was leaking slightly

 

Smeech

Member

Feb 28, 2004

148

1

16

Fremont, Ca

Nov 21, 2004

#5

• Nov 21, 2004

• #5

yes, i know which line you're talking about, and it's not in all the way, only halfway. I thought that was enough. I'll check that..

How did everyone else tighten the plenum?

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

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Dunedin, FL

Nov 21, 2004

#6

• Nov 21, 2004

• #6

Smeech said:

How did everyone else tighten the plenum?

Click to expand...

Without a torque wrench, just use a small socket wrench and tighten with one hand.

 

Smeech

Member

Feb 28, 2004

148

1

16

Fremont, Ca

Nov 21, 2004

#7

• Nov 21, 2004

• #7

twogts4us said:

Without a torque wrench, just use a small socket wrench and tighten with one hand.

Click to expand...

thanks for the quick replies!

 

Smeech

Member

Feb 28, 2004

148

1

16

Fremont, Ca

Nov 21, 2004

#8

• Nov 21, 2004

• #8

well, pushed on the hose in the back as well as I could, and tightened the plenum down better (some bolts did need good tightening) and it sounds fine now.

 

Beau

Founding Member

Jan 29, 2000

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San Diego

Nov 21, 2004

#9

• Nov 21, 2004

• #9

good job

 

D

Darkhorse845

Banned

Nov 17, 2004

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Nov 21, 2004

#10

• Nov 21, 2004

• #10

Yes,good job!

 

madmatt

Ellis Juan sympathizer

Founding Member

Dec 28, 2002

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Lexington, SC

Nov 21, 2004

#11

• Nov 21, 2004

• #11

Hows the SOTP gain with them on? Congrats on fixing your prob.

 

myponyrocks

I have more billet on the Stang than most women ha

Apr 18, 2004

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Nov 22, 2004

#12

• Nov 22, 2004

• #12

no SoTP gains, at least I dont feel em, throttle response is silky smooth now though, and that makes it worth every penny even if I'll only see the increase on the Dyno

 

twogts4us

15 Year Member

Apr 1, 2004

4,188

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Dunedin, FL

Nov 22, 2004

#13

• Nov 22, 2004

• #13

madmatt said:

Hows the SOTP gain with them on? Congrats on fixing your prob.

Click to expand...

I really noticed a difference on mine at 3K...it suddenly pulls like it never did before, pulling pretty hard to 6K (it can NEVER pull hard enough ). Below 3K, the difference is minimal. The 3.73s likely make the additional power more noticable.

 

Smeech

Member

Feb 28, 2004

148

1

16

Fremont, Ca

Nov 22, 2004

#14

• Nov 22, 2004

• #14

twogts4us said:

I really noticed a difference on mine at 3K...it suddenly pulls like it never did before, pulling pretty hard to 6K (it can NEVER pull hard enough ). Below 3K, the difference is minimal. The 3.73s likely make the additional power more noticable.

Click to expand...

Same here.. plus I like no slack in the throttle. The exhaust has a deeper tone, and the car now sounds mean coming towards you.

 

Tylerb59

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Mar 7, 2003

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Arlington, WA

Nov 22, 2004

#15

• Nov 22, 2004

• #15

YES.

Damnit, I'm having the same problem. I thought I check every connection going in but that diesel sound is / was driving me nuts.