3 Bar map sensor reading 2psi boost at idle, intermittent
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From: Northwest side of Chicago
3 Bar map sensor reading 2psi boost at idle, intermittent 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
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
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From: Northwest side of Chicago
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.
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.
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From: Norn Iron
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.
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.
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Verdad Gallardo 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.
Carry on.
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From: Norn Iron
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
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
