Drivability tune

RyanGT · June 28th, 2008, 11:22 PM

At partial throttle what is the timing supposed to be at? Trying to get the drivability under control. WOT is supposed to be at mid-high teens with 15 psi boost.

I have a datalog for anybody that is interested. My wideband is currently being sent back for repairs... so only got the narrowband o2's. But its only partial throttle anyways, WOT is dyno tuned.

RyanGT · June 29th, 2008, 02:06 AM

bump, also its around 30s at partial throttle is why im asking, thats a huge difference.

limited · June 29th, 2008, 01:29 PM

might be a touch high, but thats normal for part throttle timing. if you go wot from 2000 or so the timing should drop way back to more like 9 or 10(just throwing a number out here) and then climb to peak timing from there

RyanGT · June 29th, 2008, 07:16 PM

cool thanks... i thought that seemed high. Im getting an ignition code too, and i just replaced the cops (mechanic lent me a set of 8) to see if that would get rid of the problem. So was thinking maybe it was misfiring cause of huge amounts of timing at partial throttle.

RyanGT · July 3rd, 2008, 12:03 AM

While WOT in 3rd, shifting to 4th it practically falls on its face. It stumbles huge. What do you think would cause that? Have a datalog of it. Also still seems low on power, and minor stumbling.

What would cause the shifting issue? Anythoughts? Mechanics take awhile to get time to look at it.. and joe has been busy and hasnt responded.

SWEET2KSTANG · July 3rd, 2008, 12:36 AM

the timing at part throttle shouldnt cause any misfire issues, unless it set way to aggressive, even then it should ping instead of anything else. do you know what total timing is???

RyanGT · July 3rd, 2008, 01:13 AM

Partial throttle is low 30s, when WOT it goes to 11-13 with 15 lbs. Not sure what total timing is. Also had missfire parameter turned on the last datalog, and wasnt set off once.

The radiator temp was at 185 for 45 min drive, didnt go above it. IAT was at about 140-156. And underhood temps seem super hot. Dont know if that would have any effect on drivability. Cause it does to it when it is first driven still...

SWEET2KSTANG · July 3rd, 2008, 02:23 AM

those temps are about right if its hot and just running around. i would make sure the plugs, fuel filter, and the fuel are all good. check the afr's, and go from there. if its running a little lean or if you have too much timing, this issue can occur.

RyanGT · July 3rd, 2008, 03:01 AM

fuel filters pretty new. Plugs are ngk tr55's... i heard those arent so good of plugs. Should i switch to autolites 103's? I have boost a spark, so im not sure if that would be whats the matter...

Might have to get re dyno tuned.. for driveability. He just did WOT in 4th, and idle. Didnt mess with drivability at all.

to make matters worse my a/f gauge took a dump on me and has to be sent back...

RyanGT · July 3rd, 2008, 03:05 AM

tr6's i mean, not the 55's.

limited · July 3rd, 2008, 03:17 AM

datalog the fuel pressure drop across the injectors at the shift and see where you are

SWEET2KSTANG · July 3rd, 2008, 04:25 AM

the ngk's should work just fine for your app. i would just take it to the dyno and have it tuned, or have someone else tune it.

RyanGT · July 3rd, 2008, 12:26 PM

I dataloged that actually, fuel pressure drop across injectors at rail. And it looks like theres some funky stuff going on. Same with fuel source.

At wot its around 50-55 (seems right) but towards the end went to 90 for a second. Some of the problem spots of sputtering was at 20's or 50s (spikes). At one point, i saw the pressure at 2 for about 4 seconds... and that is bad! Looks likes that happened in a few spots. That could be after i let off but still...

Think ill need some dyno time... Mechanic that i had messing with the drivability doesnt have a dyno, so he cant mess with the WOT stuff. Unless the frp is connected some how.

03_StangGuy · July 3rd, 2008, 12:43 PM

def get a dyno tune, should solve the problems.

RyanGT · July 3rd, 2008, 04:37 PM

Had a dyno tune for WOT and idle, but we didnt mess with the drivability. Should have!!! Kinda annoyed, i didnt know better but he should have.

SWEET2KSTANG · July 3rd, 2008, 10:23 PM

the connction and the sensor good on the fuel rail?

RyanGT · July 4th, 2008, 12:36 AM

No idea on the sensor if its good or not... no codes for it. Connection is good. I should email you the datalog so you could see some of the issues. I got the times where is was extremely fubared. It has more than just those spots though...

SWEET2KSTANG · July 4th, 2008, 12:43 AM

send it to me and i will take a look at it.

RyanGT · July 4th, 2008, 01:39 AM

It wont let me pm you a file, and your email is locked. Can you pm me your email? Thanks for helping me out!

June 28th, 2008, 11:22 PM	#1
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	Drivability tune At partial throttle what is the timing supposed to be at? Trying to get the drivability under control. WOT is supposed to be at mid-high teens with 15 psi boost. I have a datalog for anybody that is interested. My wideband is currently being sent back for repairs... so only got the narrowband o2's. But its only partial throttle anyways, WOT is dyno tuned. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

June 29th, 2008, 02:06 AM	#2
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	bump, also its around 30s at partial throttle is why im asking, thats a huge difference. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

June 29th, 2008, 01:29 PM	#3
limited Regular Join Date: Mar 2007 Location: Tacoma,Washington Posts: 408	might be a touch high, but thats normal for part throttle timing. if you go wot from 2000 or so the timing should drop way back to more like 9 or 10(just throwing a number out here) and then climb to peak timing from there __________________ 99 limited edition conv. KB 2.1 9 psi intercooled.vt stage 3 blower cams,gt40 fp/bap,vt covers,frpp 3:73's,demolet cai,accufab 75mm tb,Sct Ba 2400,tri-ax,bfg kdw's,magnaflows Tuned by Joe at http://www.tricktuners.com

June 29th, 2008, 07:16 PM	#4
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	cool thanks... i thought that seemed high. Im getting an ignition code too, and i just replaced the cops (mechanic lent me a set of 8) to see if that would get rid of the problem. So was thinking maybe it was misfiring cause of huge amounts of timing at partial throttle. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 3rd, 2008, 12:03 AM	#5
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	While WOT in 3rd, shifting to 4th it practically falls on its face. It stumbles huge. What do you think would cause that? Have a datalog of it. Also still seems low on power, and minor stumbling. What would cause the shifting issue? Anythoughts? Mechanics take awhile to get time to look at it.. and joe has been busy and hasnt responded. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

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July 3rd, 2008, 12:36 AM	#6
SWEET2KSTANG I Post Entirely Way Too Much 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 5,027	the timing at part throttle shouldnt cause any misfire issues, unless it set way to aggressive, even then it should ping instead of anything else. do you know what total timing is??? __________________ stock long block, bolt ons, slicks, and a little squeeze N/A-12.81@103.7 N2O-11.79@115.8 parting out 04 cobra, pm me for details

July 3rd, 2008, 01:13 AM	#7
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	Partial throttle is low 30s, when WOT it goes to 11-13 with 15 lbs. Not sure what total timing is. Also had missfire parameter turned on the last datalog, and wasnt set off once. The radiator temp was at 185 for 45 min drive, didnt go above it. IAT was at about 140-156. And underhood temps seem super hot. Dont know if that would have any effect on drivability. Cause it does to it when it is first driven still... __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 3rd, 2008, 02:23 AM	#8
SWEET2KSTANG I Post Entirely Way Too Much 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 5,027	those temps are about right if its hot and just running around. i would make sure the plugs, fuel filter, and the fuel are all good. check the afr's, and go from there. if its running a little lean or if you have too much timing, this issue can occur. __________________ stock long block, bolt ons, slicks, and a little squeeze N/A-12.81@103.7 N2O-11.79@115.8 parting out 04 cobra, pm me for details

July 3rd, 2008, 03:01 AM	#9
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	fuel filters pretty new. Plugs are ngk tr55's... i heard those arent so good of plugs. Should i switch to autolites 103's? I have boost a spark, so im not sure if that would be whats the matter... Might have to get re dyno tuned.. for driveability. He just did WOT in 4th, and idle. Didnt mess with drivability at all. to make matters worse my a/f gauge took a dump on me and has to be sent back... __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 3rd, 2008, 03:05 AM	#10
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	tr6's i mean, not the 55's. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 3rd, 2008, 03:17 AM	#11
limited Regular Join Date: Mar 2007 Location: Tacoma,Washington Posts: 408	datalog the fuel pressure drop across the injectors at the shift and see where you are __________________ 99 limited edition conv. KB 2.1 9 psi intercooled.vt stage 3 blower cams,gt40 fp/bap,vt covers,frpp 3:73's,demolet cai,accufab 75mm tb,Sct Ba 2400,tri-ax,bfg kdw's,magnaflows Tuned by Joe at http://www.tricktuners.com

July 3rd, 2008, 04:25 AM	#12
SWEET2KSTANG I Post Entirely Way Too Much 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 5,027	the ngk's should work just fine for your app. i would just take it to the dyno and have it tuned, or have someone else tune it. __________________ stock long block, bolt ons, slicks, and a little squeeze N/A-12.81@103.7 N2O-11.79@115.8 parting out 04 cobra, pm me for details

July 3rd, 2008, 12:26 PM	#13
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	I dataloged that actually, fuel pressure drop across injectors at rail. And it looks like theres some funky stuff going on. Same with fuel source. At wot its around 50-55 (seems right) but towards the end went to 90 for a second. Some of the problem spots of sputtering was at 20's or 50s (spikes). At one point, i saw the pressure at 2 for about 4 seconds... and that is bad! Looks likes that happened in a few spots. That could be after i let off but still... Think ill need some dyno time... Mechanic that i had messing with the drivability doesnt have a dyno, so he cant mess with the WOT stuff. Unless the frp is connected some how. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 3rd, 2008, 12:43 PM	#14
03_StangGuy Hardcore Enthusiast Blown 03 GT Join Date: Jun 2007 Posts: 1,457	def get a dyno tune, should solve the problems.

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July 3rd, 2008, 04:37 PM	#15
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	Had a dyno tune for WOT and idle, but we didnt mess with the drivability. Should have!!! Kinda annoyed, i didnt know better but he should have. __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 3rd, 2008, 10:23 PM	#16
SWEET2KSTANG I Post Entirely Way Too Much 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 5,027	the connction and the sensor good on the fuel rail? __________________ stock long block, bolt ons, slicks, and a little squeeze N/A-12.81@103.7 N2O-11.79@115.8 parting out 04 cobra, pm me for details

July 4th, 2008, 12:36 AM	#17
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	No idea on the sensor if its good or not... no codes for it. Connection is good. I should email you the datalog so you could see some of the issues. I got the times where is was extremely fubared. It has more than just those spots though... __________________ 2000 Black convertible GT: KB 14psi, and other goodies...

July 4th, 2008, 12:43 AM	#18
SWEET2KSTANG I Post Entirely Way Too Much 2000 mustang gt 11.79@115.83 Join Date: Oct 2006 Location: N.W. AR Posts: 5,027	send it to me and i will take a look at it. __________________ stock long block, bolt ons, slicks, and a little squeeze N/A-12.81@103.7 N2O-11.79@115.8 parting out 04 cobra, pm me for details

July 4th, 2008, 01:39 AM	#19
RyanGT Hardcore Enthusiast 2000 GT Join Date: Dec 2006 Location: Lynnwood, Washington Posts: 1,200	It wont let me pm you a file, and your email is locked. Can you pm me your email? Thanks for helping me out! __________________ 2000 Black convertible GT: KB 14psi, and other goodies...