New Datalog

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New Datalog

Unread postby Fasterthangas » Sat Sep 26, 2015 2:16 pm

Today Michael went into my tune remotely to see what was up with my fussy car. He was able to dial in a nice idle and I now get no stalling.
The problem that I'm still having is when I put her in gear and drive away. The rpm's jump up and the car wants to cruise on it's own without touching the gas.
If I kick the pedal quick; the idle drops a bit, surges and then settles to around 1100rpm. Neither the accelerator cable nor the TB is sticking.
So....I have the engine idling high from light to light and I suspect this is what is heating my tranny up or at least partially. Today the tranny reached 230* and I babied her home.
I have bad pinging when loading engine in O/D. I'm not sure if it's a good idea around town to use O/D with a 2800 stall converter.
Michael discovered that my butterfly set screw was backing off on it's own during idle so I locked it down.
A BIG thanks to Michael for going above and beyond to try to figure this one out.
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Re: New Datalog

Unread postby StangD » Sat Sep 26, 2015 2:35 pm

Glad to hear Michael helped you out and some progress was made. OD probably not a good idea at low speed until you finish your tune at least. You could be lean right at the point it is pinging? Have you made any attempt to dial in your fuel yet?
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Re: New Datalog

Unread postby Fasterthangas » Sat Sep 26, 2015 2:56 pm

StangD wrote:Glad to hear Michael helped you out and some progress was made. OD probably not a good idea at low speed until you finish your tune at least. You could be lean right at the point it is pinging? Have you made any attempt to dial in your fuel yet?


I think Michael messed with the MAF curve. My main concern has been this darn idle in Park and Drive. If I don't get this right; I fear I may burn up the tranny.
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4" CAI
Accufab 75mm TB
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1-3/4" shorty headers into 2.5" duals out the back with H pipe. Jones Maxflow straight through mufflers

Re: New Datalog

Unread postby decipha » Sat Sep 26, 2015 6:48 pm

I didnt mess with the maf curve it seemed pretty close i just dropped the low slope and kicked up the breakpoint and it was pretty close

OD isnt a problem

It sounds like your distributor is set wrong, yank the spout and make sure its at 10 dbtdc
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Re: New Datalog

Unread postby Fasterthangas » Sat Sep 26, 2015 7:31 pm

decipha wrote:I didnt mess with the maf curve it seemed pretty close i just dropped the low slope and kicked up the breakpoint and it was pretty close

OD isnt a problem

It sounds like your distributor is set wrong, yank the spout and make sure its at 10 dbtdc


I verified that early on with two different timing lights. I even checked the balancer TDC mark with a piston stop. I think I have the car from hell. Anyone have some holy water?
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4" CAI
Accufab 75mm TB
T5
3.73's
1-3/4" shorty headers into 2.5" duals out the back with H pipe. Jones Maxflow straight through mufflers

Re: New Datalog

Unread postby decipha » Sat Sep 26, 2015 8:17 pm

ha lol

well it its detonating then you need yank some timing in the cell its pinging
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Re: New Datalog

Unread postby quartermaster » Sat Sep 26, 2015 9:46 pm

Hi Eric Do you have a functioning egr valve? They reduced the chance of detonation during cruise and light to moderate load as well as nox emissions. Andrew
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Re: New Datalog

Unread postby Fasterthangas » Sun Sep 27, 2015 9:59 am

quartermaster wrote:Hi Eric Do you have a functioning egr valve? They reduced the chance of detonation during cruise and light to moderate load as well as nox emissions. Andrew


No Andrew. Previous owner pulled all emission stuff.
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4" CAI
Accufab 75mm TB
T5
3.73's
1-3/4" shorty headers into 2.5" duals out the back with H pipe. Jones Maxflow straight through mufflers

Re: New Datalog

Unread postby Fasterthangas » Sun Sep 27, 2015 10:02 am

decipha wrote:ha lol

well it its detonating then you need yank some timing in the cell its pinging


What appears to be happening is that O/D is kicking in way to early. It's lugging big time at slow speeds. Shut O/D off and the car is just fine.
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230/238 @ .050 custom cam
AFR Renegade 185 heads
Ford Racing EV14 34lb. injectors
90mm Lightning MAF
4" CAI
Accufab 75mm TB
T5
3.73's
1-3/4" shorty headers into 2.5" duals out the back with H pipe. Jones Maxflow straight through mufflers

Re: New Datalog

Unread postby StangD » Sun Sep 27, 2015 10:48 am

If you can isolate the rpm/load range/MAF point where it is rattling we can easily pull a little timing and make sure it isn't lean there. That would be better than detuning it everywhere. As Decipha said, need to find the correct cell(s) to tweak and that will require some info from you since you are driving the car. This will be a very useful thing for you to learn how to do now. As would learning how to bump the tunes shift point into OD a bit. You don't need to be in OD at 30mph. It's just gonna piss off your engine. Especially when weather is very warm which is always where you live.
94 Mustang GT-T5-347(Fordstrokers DIY)-TF190s,FTI Cam,Ported Victor EFI,42s-LMAF,85MM TB-Nitrous-Suspension mods and DRs.
CBAZA-TM40

12.1 @119.50 NA

Pulling baby wheelies and breakin stuff.
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Re: New Datalog

Unread postby decipha » Sun Sep 27, 2015 11:21 am

going into OD has nothing to do with pressure

Go to the 3-4 shift speed function and make it shift at a higher speed
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Re: New Datalog

Unread postby StangD » Sun Sep 27, 2015 11:45 am

decipha wrote:going into OD has nothing to do with pressure

Go to the 3-4 shift speed function and make it shift at a higher speed


He's referring to encouraging spark knock from lugging it more than necessary at low rpms. It would be cool if 3-4 shift tune change alone might even cure it without killing any timing.
94 Mustang GT-T5-347(Fordstrokers DIY)-TF190s,FTI Cam,Ported Victor EFI,42s-LMAF,85MM TB-Nitrous-Suspension mods and DRs.
CBAZA-TM40

12.1 @119.50 NA

Pulling baby wheelies and breakin stuff.
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Re: New Datalog

Unread postby decipha » Sun Sep 27, 2015 11:50 am

if its pinging its overadvanced regardless, its needs to be yunk out no other way around it
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91 4r70w - Skarlett
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93 auto - Danika
94 5spd Rionda
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Re: New Datalog

Unread postby StangD » Sun Sep 27, 2015 12:40 pm

decipha wrote:if its pinging its overadvanced regardless, its needs to be yunk out no other way around it


I get that, and as I stated I will help him pull some timing. But if it was my car I would correct the condition causing the lugging while I was at it, rather than pulling more timing than is probably necessary. I cn make my car ping if I pull some fuel and shift too early driving uphill. Quite easily corrected without pulling timing. Sounds like he's shifting into OD too early and "driving uphill" for no reason. That is my only point.
94 Mustang GT-T5-347(Fordstrokers DIY)-TF190s,FTI Cam,Ported Victor EFI,42s-LMAF,85MM TB-Nitrous-Suspension mods and DRs.
CBAZA-TM40

12.1 @119.50 NA

Pulling baby wheelies and breakin stuff.
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