SPRAYED 01

iTrader: (22)

So I just got done reinstalled my freshened up forged 370 and freshened FLT trans. Only thing I really changed was the cam.

Same 3 bar ive been using trouble free for like 6 years. Fired the car up, filled witH coolant, running on the lift just checking things over and it dies. Now I haven't retuned yet but the cam isn't all that much different and it runs fine the way it is.

After it died I lowered the car and noticed by boost leash controller was reading 2psi boost with the engine off. I restarted and everything was fine. This has happened twice in about 10 minutes of idle time. It dies and I notice my controller reading boost.

Wiring looks good, nothings really much different. Could the sensor just be bad?

Alex

stevieturbo

Exactly what are you using the 3 bar map sensor for ?

Are you saying both the one used for the ecu, and another for the boost controller are giving problems ?

SPRAYED 01

iTrader: (22)

Ok your question just reminded me that my boost leash has its own map sensor. I totally forgot as I installed it like 4 years ago. So I guess the boost leash sensor or system is having an issue.

But why does the car die out when the leash sensed 2psi? Now when it does sense the boost it activates a solenoid and sends air pressure from my air tank to the waste gate but that shouldn't kill the engine.

stevieturbo

I've no idea what your Leash does, nor how it might interface with your engine, or engine control ecu.

But I would be very surprised if it was able to do anything to cause the engine to die, as generally they are totally independent of the engine ? And when you say air tank...that would suggest it is 100% independent...ie not even any air lines connected between the two ?

So by looking there...I think you're looking in the wrong direction.

droksformula

iTrader: (18)

Need to hook your car up to a scanner or tuning software to log if possible. Are you 100% your map wires aren't crossed?

SPRAYED 01

iTrader: (22)

You are correct the boost leash is totally separate. Ill just have to log for a long time to try and catch it dying out.

Taxman20

iTrader: (11)

with an increase in boost to the controller wouldn't the controller change the fuelling to account for it?

As for the sensor, I would say its probable just bad.

stevieturbo

The boost controller has nothing to do with the fuel, spark, whatever.

It's a standalone device intended to control only boost.

Taxman20

iTrader: (11)

I see where I am thinking. Reread the post. The controller is whats reading and its not getting its reading from a MAP sensor. I was thinking MAP was showing boost, which would change the fuel and spark accordingly.

Carry on.

stevieturbo

A MAP sensor is just a sensor. Various devices can use them to get a pressure reading from.

But that is all that does, give a reading. It doesnt control, it just reports

Both the ecu and boost controller could view this reading and then take action based on what it sees. In this case the ecu will probably have its own sensor, and likewise the boost controller.

And as you say, the ecu is in charge of tings like fuel/spark, so it can change these based on what it sees and what the user/tuner has programmed it to do.

The boost controller will try and adjust boost based on what it sees etc etc

Taxman20

iTrader: (11)

I understand all of this. I was just thinking wrong. I have an Eboost2 that does the same thing. Not a problem.

Old Geezer

iTrader: (3)

3 bar on both systems? If so, swap them, KOEO, check the reading on the Leash controller. Y/N??