I searched this and could not find.
when i accelerate from a slow roll, I get engine rev and it takes a split sec before the car responds.Any clue??

 

It has been talked about quite a bit. A tune should take care of your problems.
Michael

 

what do you mean by tune?

 

My .02 is most likely the dreaded throttle by wire lag that us with automatic transmissions have experienced. Where you hit the GO pedal and nothing happens for a second or so due to the computerized torque management. This can be resolved by a computer retune SCT has been better with this than Predator. The engine when this happens does not overly rev prior to transmission engagement.

If your engine though is definitely revving up prior to the tranny kicking in then there is a more of a your car specific problem than the standard toque management issue we are all complaining about. This problem would need to go back to the dealer for correction.

These are 2 very distinctively different problems with 2 completely different courses of correction naturally.

 

thank you. mine does not overly rev,it's just the normal rev when you give it a little gas and then it jerks you.

 

If you're driving at speeds below 60, turn off overdrive. That definately gets rid of most of that lag. You'd be astonished at how low your speed can get in 5th gear. I've been in 5th as low as 35mph. Helps gas milage, screws perfomance.

 

Get The SCT XCAL 2, It give you a more aggressive tune for Automatics over the Preditor.

I had my tuner set my shift schedule very agressive it removed over 70% of the Lag. If you replace the Throttle body to a 60mm or 62mm they say it may remove up to 85% of the delay.

The purpose of the "throttle delay" is to avoid clunk. Removing tip-in rate limiting will now cause you to have clunks on rapid pedal tip-in's. Also, you must be careful when you say "throttle delay". Tip-in rate limiting is not a "delay" but a limit in the rate at which the throttle is opened. In the automatic, the vast majority of your "throttle delay" complaints will actually be transmission induced as a result of hydraulic delays and shift scheduling. Removing tip-in rate limiting will not help, tuning will.

Finally, all spark-ignited engines with a finite intake manifold volume will have a delay between when the throttle plate moves and when the engine starts to increase torque output. This is because the intake manifold takes a certain amount of time to fill with the incoming air. The bigger the intake manifold, the bigger the delay.

Some user adjustable setting for the SCT XCAL II

Fuel Adjustment
Wide Open Throttle:
6% Leaner to 14% Richer
Fuel Injector Selection
19lb to 60lb Fuel Injectors
MAF Selection
80mm to 90mm Lightning SCT Big Air BA-2400 & BA-2800 MAF Meters
Spark Adjustment
Global Spark: -5 to +5 degrees
RPM Adjustment Spark:
0 - 2000RPM: -14 to +4 degrees
2000 - 4000RPM: -8 to +4 degrees
4000 - 8000RPM: -8 to +4 degrees
View Trouble Codes
Diagnose Check Engine Lights & Clear Trouble Codes
Axle Ratio Selection
2.73 to 5.14 Ratios
Tire Size Selection
205/65/15 to 315/35/19
Other Selections
Idle RPM: -300 to +300RPM
Cooling Fan: On / Off Temp
Traction Control: On / Off
Two Step: On / Off & RPM
Shift Adjustment
Automatic Transmission Shift Schedule:
WOT 1st - 2nd: -3 to +7mph
WOT 2nd - 3rd: -4 to +8mph
WOT 3rd - 4th: -5 to +10mph
WOT 4th - 5th: -5 to +10mph

 

Scott,thank you very much.I don't have a clue what the heck you said :scratch: ,but I'm printing this and bringing it to the dealer. I wish I would have paid attention in my auto mechanic class in high school

 

When I state Dealer, I mean SCT XCalibrator 2 dealer
You should be able to find a speed shop in your area that you can get a tuner from, or Bamachips (Click here) will hook you up with a tuner and a tune for 87 -93 Octane and reduce the Delay. Trust me, you will love it

 

Before you try anything else, give this scheme a try: (posts 11 and 41 in the thread)

http://forums.bradbarnett.net/index.php?sh...pic=10690&st=40

It worked for me!

 

Chris,thanks for the tip. Unfortunately I tried it 3 X and it did not work.Took her in to Bill Currie today.Keep you guys updated....Where in Tampa are you? I'm in Lutz

 

Yesterday the mustang ( automatic transmission) felt like it was going into neutral at about 25 mph for about a second and then it jumped into gear, this happened a few times during the day. Today it happened again and reved up to 5000 rpm for about 2 seconds shortly after I had started the engine. I have called the dealer and the mustang is going into the shop on Thursday. I will keep you all advised.

 

I'm just down the road near Bearss and Dale Mabry. Let us know what they find.