Ok well my car has been sitting for about 3 months now due to me needing to replace my DP.

During the down time I've done the following:

1. Replace my heater hoses back by the firewall

2. Switched from a 16g to a 20g

3. Had a stock 3g muffler welded on my 3" exhuast

4. Updated my MS firmware

Now...what happens is I start the car and it will idle fine and if I go to drive it, it will stall out within a minute or 2. If I just let it sit and idle long enough...it will stall out as well.

I datalogged the symptom at idle and there is a point right before it stalls were my map signal and my rpms cross and my rpms go way up and my map signal shoots way down. I will post a screen shot of it tonight. Almost looks like the map does a reflection effect of the RPM if that makes any sense.

Why is it stalling out all the sudden? I didn't do anything out of the ordinary for this to happen. Could my IAT sensor be failing?

Also after the car stalls out, I can't restart the car for at least 5 mins after it stalls. And this is true for everytime it stalls.

I know it has to be MS related.

All help is appreciated!

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

I would reload the previous firmware to see if the issue continues. The amount of fuel being injected also affects your map value. I am not quite sure whats going on but since you just loaded a newer firmware, i would revert back to the original you had and try that.

Terry

Well I didn't go back to my normal firmware as of yet. I did pull out my IAC sensor and the little probe in it was gone. I replaced it and now my car runs ULTRA LEAN! I mean 19.9. Since day one it hasn't held a tune...it just keeps falling out of tune really fast and doesn't seem to work very well.

I have been having nothing but issues with it since I purchased it. I am thinking about going with a portfueler here very soon if this keeps up.

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

What firmware did you upgrade to? When an engine is starting to chug or die out, you will notice that the map will get higher(engine pulls very little vac when its running bad)closer to 100 kpa, so that sounds somewhat normal..I would go through ALL of you settings in Megatune to be sure nothing got skewed when you did the firmware change. Sometimes a few settings can get off when upgrading. Especially check the closed loop perameters, as you your o2 settings may have changed, and the ECU is trying to run super lean. Verify you have all the settings the way they should be, then go from there.

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

I'll take a look and see if any of the settings have changed. Thanks for the heads up.

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

What I did before changing over to the 029t firmware was take screenshots of all of my settings so I could make sure nothing changed.

_____________________________________


http://www.dsmregistry.com/detail.php?carid=1133
*form follows function*

Did you notice any settings that changed?

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

All of my accel enrichment settings got changed.

_____________________________________


http://www.dsmregistry.com/detail.php?carid=1133
*form follows function*

yes it is...I should of done it, but never expected it to switch setting like that. Guess I learned my leason.

Car is still stalling out and no idea why. It seems that its temperature related, but I'm not 100% sure why. Reason I want to think that is cause the car will start up and and idle fine now that we adjusted the VE Fuel table so its not super lean anymore. But after my coolant temp reaches about 200 the car shuts off, and then I can't restart the car until it cools down a bit.

Now I am not 100% sure its that, its just a hunch due to the symptoms.

It really seems everything started going haywire after the update to the O29T firmware.

If I don't get this figured out this week, I will have to pull the MSnS and purchase a portfueler. My car has been down for 4 months now and its my daily driver so I can't realy sink any money into getting a daily to only sink more into it to keep it running....otherwise my car will never see the road again. I need to fix my car now.

I know its the MSnS and I am starting to beleive its not for me.

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

Was it running fine on the old firmware? Switch it back, then mess with the new when you have time.

You're brave to MS and all the custom work to your daily driver. As much as I really want to, (with my past experience) I don't think I could recommend that.

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

Is your car shutting off exactly when the fan is suppose to kick on?

Joel Baldridge, ASE Certified Master Technician, Audi Certified Expert Technician

The fan control indicator just flickers on the MT screen. It has always been that way, why, what are you thinking?


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the first solution that comes to mind for any new problem with my car usually involves a can of bad gas and a match...

OK...well I went back to the 029q2 and everything works fine again, except the warmup which is the reason I updated in the first place.

The only thing that blows my mind is why I couldn't restart the car right after it stalled out. I wonder if I just had a bad flash into 29t or if that version has a problem with the neon decoder!

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

That's exactly what I was thinking. Is anyone else running 29t on here?


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the first solution that comes to mind for any new problem with my car usually involves a can of bad gas and a match...

I'm running the 029t version. I had a similar problem with the fan option. If I connect the Rad fan to the relay, I would not have connection to the MS.
With the cable disconnected I have no problems conecting to the MS. It also flickers when I turn the car on. So far I have a switch on the fan. I will get an extarnal thermostat for the rad fan until the problem with the fan control is fixed.
Try this, after you car dies, disconnect the rad fan cable from the relay and try to turn ON the car. See if you can start it.

1995 Eclipse RS-T
GT35R, SPEC Stage 5 clutch
E85 Fuel(Helping the Ecosystem)
MS, v3.0, 029t
10.87 @ 135

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

1995 Eclipse RS-T
GT35R, SPEC Stage 5 clutch
E85 Fuel(Helping the Ecosystem)
MS, v3.0, 029t
10.87 @ 135

Originally posted by customrsturbo
If the car is ON, I can connect the fan cable to the relay and the fan stays ON. If I turn OFF the car and try to restart the car, the comunication to the MS is gone. If I disconect the fan cable from the relay, the comunications resumes.

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

I'd like to try the 029v firmware, just to see what happens.
-----------
'96 Eclipse GS
'94 Talon TSi AWD 6 bolt

Originally posted by Aggression

Originally posted by customrsturbo If the car is ON, I can connect the fan cable to the relay and the fan stays ON. If I turn OFF the car and try to restart the car, the comunication to the MS is gone. If I disconect the fan cable from the relay, the comunications resumes.

See that makes no sense, but at the same time it does with the 029t firmware. Have you tried or thought about going to the 029v and seeing if that acts any differently?

1995 Eclipse RS-T
GT35R, SPEC Stage 5 clutch
E85 Fuel(Helping the Ecosystem)
MS, v3.0, 029t
10.87 @ 135

Originally posted by customrsturbo

Originally posted by Aggression

Originally posted by customrsturbo If the car is ON, I can connect the fan cable to the relay and the fan stays ON. If I turn OFF the car and try to restart the car, the comunication to the MS is gone. If I disconect the fan cable from the relay, the comunications resumes.

See that makes no sense, but at the same time it does with the 029t firmware. Have you tried or thought about going to the 029v and seeing if that acts any differently?

No, it doesn't bother me that much. I will provide a external thermostat for fan control.

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- 05 Subaru STi
- 97 eclipse gs (289whp w/ 276tq)

Originally posted by Aggression

Originally posted by customrsturbo

Originally posted by Aggression

Originally posted by customrsturbo If the car is ON, I can connect the fan cable to the relay and the fan stays ON. If I turn OFF the car and try to restart the car, the comunication to the MS is gone. If I disconect the fan cable from the relay, the comunications resumes.

See that makes no sense, but at the same time it does with the 029t firmware. Have you tried or thought about going to the 029v and seeing if that acts any differently?

No, it doesn't bother me that much. I will provide a external thermostat for fan control.

I can understand that but I've heard people saying they get smoother accel with v as well. Its worth a try don't you think?

1995 Eclipse RS-T
GT35R, SPEC Stage 5 clutch
E85 Fuel(Helping the Ecosystem)
MS, v3.0, 029t
10.87 @ 135

Maybe the addition of a big cap on the power supply input could help with that.



-----------
'96 Eclipse GS
'94 Talon TSi AWD 6 bolt

1995 Eclipse RS-T
GT35R, SPEC Stage 5 clutch
E85 Fuel(Helping the Ecosystem)
MS, v3.0, 029t
10.87 @ 135