car dies near 3k rpm

[elturbonitroso]

hi guys here is my problem i was using my ms1ns-e to control only the fuel and the car rev fast and idle now im using the spark control and when the car is near the 3k the car dies im using a 4 pin module to conditining the signal from the vr sensor and a msd to drive the coil any suggestion in what should i try. is a v2.2 board code 029q2 and megatune 2.25 and everything hook up like this from the vr sensor + to W in the 4 pin from - of the vr sensor to G a 470 ohms 1/2 w resistor from B to C B is 12 volt and C to pin 24 in megasquirt im using fidle for spark since idont have one and from fidle to the white wire of the msd and now when the car is near the 3k rpm the car dies any idea in what could cause this.thanks

[MegaScott]

hi guys here is my problem i was using my ms1ns-e to control only the fuel and the car rev fast and idle now im using the spark control and when the car is near the 3k the car dies im using a 4 pin module to conditining the signal from the vr sensor and a msd to drive the coil any suggestion in what should i try. is a v2.2 board code 029q2 and megatune 2.25 and everything hook up like this from the vr sensor + to W in the 4 pin from - of the vr sensor to G a 470 ohms 1/2 w resistor from B to C B is 12 volt and C to pin 24 in megasquirt im using fidle for spark since idont have one and from fidle to the white wire of the msd and now when the car is near the 3k rpm the car dies any idea in what could cause this.thanks

Please post your MSQ as well as a datalog of when the problem occurs.

Thank you.

[elturbonitroso]

now my big ? is how do i post a log.

[jsmcortina]

Use the "Browse" then "Add attachment" just above the "Preview" and "Submit" buttons when posting.

James

[elturbonitroso]

here is my log

[elturbonitroso]

and this is the first time and log.

[MegaScott]

Elturbonitroso,

turn on the key, fire up Megatune, go to "file" "Save as" and save the .msq file to a place you can remember, post that file here. For whatever reason, the logs won't open for me.

[elturbonitroso]

lets try this one its different one and a log.

[elturbonitroso]

nobody with some advice.

[jsmcortina]

We still don't have your MSQ

James

[elturbonitroso]

they work now.

[elturbonitroso]

i took the car out of the garage for a little spin and this is what happen when i go slow in the throttle the car stutter and i press the pedal more and nothing the car die i hear the relays.turn on the car in neutral i rev the car and rev but it makes like a litte stop near the 3k what sould i try to work on.

[MegaScott]

How are you picking up Fuel pressure on your log? If that really is the fuel pressure, it's all over the map, if it really is doing that, no wondor it runs lke crap. The fuel pressure goes all the way from 47psi to 2psi. Is the fuel pump somehow turning intermittantly on and off?

[elturbonitroso]

scott where in the log you see fuel pressure.

[MegaScott]

scott where in the log you see fuel pressure.

So you don't have fuel pressure hooked up to your Megasquirt?

You must have it enabled in your .ini and it is reading something off X7. The default has this field turned off. you would have had to go in and remove the semi-colon for this to log.

Code: Select all

[Datalog]
    ;  entry = fuelpress,        "Fuel Press",   int,    "%d"

[elturbonitroso]

the egt one also move and i dont have any egt hooked up to the megasquirt.

[MegaScott]

You know it just looks like you need to tune it, read the tuning section of the Megamanual.

http://www.megamanual.com/v22manual/mtune.htm

[jsmcortina]

I looked at the log last night and what I thought I was seeing was this:
engine starts and idles ok. Blip throttle and raise rpm to 2000-3000, release throttle, engine rpms drop and then suddenly fall to zero.

Is this what happens in practice? It is the sudden 600rpm then 0rpm that looks odd - almost as if the tach signal failed.

James

[elturbonitroso]

i was looking at the rpm gauge in megatune and the rpm drop to 0 what shoul i do or check to correct that problem.