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GT S197 General Discussion This section is for technical discussions pertaining specifically to the V8 variation of the 2005 and newer Ford Mustang.

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Old 03-21-2012, 02:27 PM   #1
Fahad_H
 
Join Date: Feb 2012
Vehicle: 2011 Ford Mustang
Location: SA
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Default 06 Mustang GT: Help me identify the problem

Hi,

We have an issue with our 2006 Mustang GT.

The car was running well for a year then all of a sudden it started to loose power at WOT.

mods include:
SCT Tuning
Steeda pulleys
Steeda CAI
Ford Racing intake manifold
SW off-road long tubes and cat-back

The car has brand new O2 sensors, and MAF.

Here is a video of few wot runs. The engine revs like normal when the clutch is depressed.

2006 Ford Mustang GT issue part2 - YouTube

and here is SCT livelink datalog file of some sensors

http://fahadhizam.com/uploads/2006_mustang_issue.csv

please let me know what should we look at.

Thank you
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Old 03-21-2012, 03:16 PM   #2
SpartaPerformance
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When did the issue start? Did you modify anything before hand? Any CEL?
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Old 03-21-2012, 03:25 PM   #3
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Quote:
Originally Posted by SpartaPerformance View Post
When did the issue start? Did you modify anything before hand? Any CEL?
about a month ago.

The transmission was fully rebuilt, then this issue happened.

MAF was replaced a couple of months ago. New O2 sensors were put about a couple of weeks ago.

The car isn't driven much, and was parked for three months before we rebuild the trans.

no CEL.

Thank you
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Old 03-21-2012, 03:27 PM   #4
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correction: the issue started before we rebuild the transmission.
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Old 03-21-2012, 03:33 PM   #5
Derf00
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When was the FRPP manifold installed?
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08 S197 GT Auto: FRPP Strut Tower Brace, FRPP Bullitt CAI, Bama 91-P Tune
Pending upgrades: Shaftmasters Aluminum 3.5" DS, FRPP 3.73 gears, Axle back exahust (?)

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Originally Posted by LostBoyz View Post
if you are getting 29mpg in your 5.0, you aren't driving it correctly
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Old 03-21-2012, 03:37 PM   #6
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Quote:
Originally Posted by Derf00 View Post
When was the FRPP manifold installed?
In May last year and the car was running very well in 2011.

thanks
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Old 03-21-2012, 04:55 PM   #7
moosestang
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You got a bad misfire going on there. Pull your spark plugs, I bet one of them is wet.

Do you have the stock coil-on-plugs?

How many miles on the spark plugs? What kind of spark plugs? It's either the plugs are bad or bad coil pack.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

Pumpkin jacking addict
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Old 03-21-2012, 05:00 PM   #8
moosestang
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it sounds like it clears up at higher rpms. My car sounded just like that when my accel coil pack failed. Sounds like a helicopter and vibrates bad.
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whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

Pumpkin jacking addict
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Old 03-21-2012, 05:04 PM   #9
Fahad_H
 
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stock coils at 70,000 miles.

spark plugs are autolite, less than 5,000 miles.

btw the car revs smooth and freely in neutral and while the clutch is depressed.

also very smooth at idle.

thanks
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Old 03-21-2012, 05:50 PM   #10
moosestang
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Quote:
Originally Posted by Fahad_H View Post
stock coils at 70,000 miles.

spark plugs are autolite, less than 5,000 miles.

btw the car revs smooth and freely in neutral and while the clutch is depressed.

also very smooth at idle.

thanks
Mine would only misfire under load and it idled rock steady. One or more of your stock coils is probably weak.

This is assuming you don't have any mechanical issues. Did you remove the charge motion plate when you installed the intake?

Can you data log the short term and long term fuel trims?
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Boost or Buell, decisions, decisions.

whipple HO SC,FRPP k springs, Pypes mid mufflers, hurst, frpp TB, 4.10's, spohn lca's, adj. UCA, relo brackets, 1 piece DS, spec stg 3+ clutch. 12.52@117.6mph so far with a 2.01 60 ft time

Pumpkin jacking addict

Last edited by moosestang; 03-21-2012 at 05:53 PM.
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Old 03-21-2012, 05:50 PM
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