SVTF issues.... - Focaljet

**Duncan** · 07-13-2008, 12:01 AM

Not 100% sure what it is or what to call it but im getting, what feel's like, throttle lag. When Im down shifting, the rpm's just hang out and dont reallly slow-my-roll the way it should. I've already taken my throttle body off and cleaned it, which was super dirty by the way) and it seems like it actually gotten worse. Help, anyone.......

**sjor** · 07-13-2008, 02:05 PM

I think what you're describing is a lack of compression braking (i.e., engine braking) when you lift off the throttle. Mine also refuses to compression brake. I've driven other newer cars that do this, too. Seems to be some emissions gremlin. This is easily my #1 aggravation with the car.

I've heard that a tune and an aluminum flywheel will make the car behave. Has that been anyone's experience?

**FORDSVTPARTS** · 07-13-2008, 09:43 PM

Could be the TP sensor acting up. They're cheap and easy to replace.

**Cnelson12** · 07-15-2008, 02:11 PM

Tune definitely helped me, it it only when you take your foot off the throttle?

**SVTgirliegirl** · 07-15-2008, 02:52 PM

My car does this too. It seems to just be when I am in certain gears though. It does it a lot in 3rd and seems to not like certain positions.

**Idrivefokused** · 07-15-2008, 05:34 PM

I've been having a weird problem that is simliar to this... my car would be idling at the first stop i get from when i started it.. My RPM's would just drop to a point where it sounds like the car would turn off then jump back up to about 1g... I'm thinking TP sensor as well?

**DonatasSVT** · 07-16-2008, 06:16 AM

It happens to me only when the engine is cold on low revs. After ~2mins it goes away.
I have a tune, aluminum fly and I have no complaints at all how my SVTf commpresion brakes (well actually I didn't have too many complaints before I added these mods but they definitely helped).

**sjor** · 07-16-2008, 11:27 PM

Quote:

Originally Posted by DonatasSVT

It happens to me only when the engine is cold on low revs. After ~2mins it goes away.
I have a tune, aluminum fly and I have no complaints at all how my SVTf commpresion brakes (well actually I didn't have too many complaints before I added these mods but they definitely helped).

Mine definitely does the high revs when cold, but it goes away once it warms up, too.

As for compression braking, yours actually did it while stock? Maybe something's aways been wrong with my car. When I lift of the throttle, it just keeps on coasting, even at relatively high rpm. The revs just drop slowly. My previous car (mid '90s Z28): when you lifted on the throttle, it was like slamming on the brakes. Loved it. This car and my dad's mustang ('99 bullett, is that when they made them?) just do not compression brake, at all. Very frustrating to always have to be on the brakes.

**DonatasSVT** · 07-17-2008, 03:35 AM

Well I'm not really sure what amount of compression braking are we talking about as I have never driven such a cars like Z28 or similar. In my SVTf it's definitely not the same as slamming on the brakes but it isn't coasting very easily too (with mods).
When it was stock - I don't remember very well but I think it braked a little less than now.
I guess the thing is that I have never driven cars which stop hardly on a lift off and in my stopping scale SVTf does just quite well

07-13-2008, 02:05 PM	#2
sjor Junior Member Join Date: Mar 2004 Posts: 78	Re: SVTF issues.... I think what you're describing is a lack of compression braking (i.e., engine braking) when you lift off the throttle. Mine also refuses to compression brake. I've driven other newer cars that do this, too. Seems to be some emissions gremlin. This is easily my #1 aggravation with the car. I've heard that a tune and an aluminum flywheel will make the car behave. Has that been anyone's experience? __________________ Keep it off the streets. The track's were it's at.

07-13-2008, 09:43 PM	#3
FORDSVTPARTS TEAM Sponsor Join Date: Nov 2004 Location: Minnesota Posts: 4,572	Re: SVTF issues.... Could be the TP sensor acting up. They're cheap and easy to replace. __________________ We are Tousley Ford offering all OEM Ford and Ford Racing parts at 10% over cost. PM me here or call Steve or Kevin at 1-800-328-9552 during regular business hours. Now accepting online orders here http://www.tousleyfordparts.com You can also find us here http://forums.focaljet.com/tousley-ford/ 2002 Silver SVT focus , custom CAI , Stage 2 throttle body, VF rear mount, FRPP 9mm wires, EAP/MACH HID's, Borla exhaust, K-W springs, FRPP UDP, Brisk LGS plugs, Screamin Demon coil, Diablo predator tune via Mike at Unique tuning. 153.27whp-140.56 lb.ft.

07-15-2008, 02:11 PM	#4
Cnelson12 TEAM Member Join Date: Oct 2005 Location: State College or Shavertown, PA Posts: 264	Re: SVTF issues.... Tune definitely helped me, it it only when you take your foot off the throttle? __________________ 2004 Infa-Red SVTF. #1772 of 1978, Born on 3/24/2004. Audophile, HID's, Winter Package, Borla Center Exit Exhaust, XCal2 tuned by FocusSport, CFM High Flow Cat and a few other things.

07-15-2008, 05:34 PM	#6
Idrivefokused TEAM Member Join Date: Dec 2007 Location: Pomona, CA. Posts: 145	Re: SVTF issues.... I've been having a weird problem that is simliar to this... my car would be idling at the first stop i get from when i started it.. My RPM's would just drop to a point where it sounds like the car would turn off then jump back up to about 1g... I'm thinking TP sensor as well?

07-16-2008, 06:16 AM	#7
DonatasSVT Rookie Join Date: Nov 2006 Location: Lithuania Posts: 28	Re: SVTF issues.... It happens to me only when the engine is cold on low revs. After ~2mins it goes away. I have a tune, aluminum fly and I have no complaints at all how my SVTf commpresion brakes (well actually I didn't have too many complaints before I added these mods but they definitely helped).

07-13-2008, 12:01 AM	#1
Duncan Rookie Join Date: Apr 2008 Location: Washington Posts: 6	SVTF issues.... Not 100% sure what it is or what to call it but im getting, what feel's like, throttle lag. When Im down shifting, the rpm's just hang out and dont reallly slow-my-roll the way it should. I've already taken my throttle body off and cleaned it, which was super dirty by the way) and it seems like it actually gotten worse. Help, anyone.......

07-17-2008, 03:35 AM	#9
DonatasSVT Rookie Join Date: Nov 2006 Location: Lithuania Posts: 28	Re: SVTF issues.... Well I'm not really sure what amount of compression braking are we talking about as I have never driven such a cars like Z28 or similar. In my SVTf it's definitely not the same as slamming on the brakes but it isn't coasting very easily too (with mods). When it was stock - I don't remember very well but I think it braked a little less than now. I guess the thing is that I have never driven cars which stop hardly on a lift off and in my stopping scale SVTf does just quite well __________________ '04 Infrared SVTf Tuned by Focus-Power, K&N 57i intake, Custom ORP CFM dogbone, FR short shifter Southbend rally clutch & Fidanza fly Hawk HPS, Toyo T1-S

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