What is this plug on the manifold? Pic-
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#9
^ After looking through the factory training manual again, I have concluded that it is only the air temperature sensor in the AFM that affects load calculations. The sensor in the manifold/TB elbow is used mostly for idle control (BAC valve, fuel pressure regulator solenoid). It is on the 3rd gen cars (speed density therefore no AFM) where the IAT plays a huge role.
So I stand corrected and withdraw my objection.
So I stand corrected and withdraw my objection.
#11
^ After looking through the factory training manual again, I have concluded that it is only the air temperature sensor in the AFM that affects load calculations. The sensor in the manifold/TB elbow is used mostly for idle control (BAC valve, fuel pressure regulator solenoid). It is on the 3rd gen cars (speed density therefore no AFM) where the IAT plays a huge role.
So I stand corrected and withdraw my objection.
So I stand corrected and withdraw my objection.
#14
What was your original problem again? Just cold starting problems? Does it ever run, so you can shut it down & see how it hot starts? I know you had some threads asking about the AFMs and other sensors; are those all related?
If you haven't done it already, pull codes and go through the FSM tests at the ECU. Check that the voltage matches on all the pins. You can check the CAS signal while you're there.
If you haven't done it already, pull codes and go through the FSM tests at the ECU. Check that the voltage matches on all the pins. You can check the CAS signal while you're there.
#16
ok. But since that sensor isnt really all the important would it be retarding my timing? Even after I have plugged it back in?
And yes Rocket this is all related to my cold start issue. Runs great once I get it started and immediately after I get it started. I can shut it off and turn it right back on again. It is that first start.
And yes Rocket this is all related to my cold start issue. Runs great once I get it started and immediately after I get it started. I can shut it off and turn it right back on again. It is that first start.
#17
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Has zip to do with your starting. I just saw this thread and some remarks and remembered something written by HENRIK and threw it in. You can trust anything HENRIK or TURBO2LTR say on the ECU side of things.
#18
I've attached a page out of the training manual. It calls both of the temp sensors "Intake Air Temp (IAT) Sensor", and shows the one in the AFM to be the input used for fuel injection corrections. It's possible Henrik was refering to this sensor input, and not the one on the manifold / compression tube. They both have the same name according to Mazda, so it would be easy to mix up. Anyway, it's not really relevant, but still something to know.
Dltreezan, do you still have thermowax & the BAC, or did you remove those?
Dltreezan, do you still have thermowax & the BAC, or did you remove those?
#20
Its very unlikely that you have a bad CAS, stuff like that just doesn't go bad in these cars usually. To make sure you can check the resistance values on it, more info in the FSM.
Thats good to hear you kind had me scared for a sec.
^ After looking through the factory training manual again, I have concluded that it is only the air temperature sensor in the AFM that affects load calculations. The sensor in the manifold/TB elbow is used mostly for idle control (BAC valve, fuel pressure regulator solenoid). It is on the 3rd gen cars (speed density therefore no AFM) where the IAT plays a huge role.
So I stand corrected and withdraw my objection.
So I stand corrected and withdraw my objection.
#21
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I've attached a page out of the training manual. It calls both of the temp sensors "Intake Air Temp (IAT) Sensor", and shows the one in the AFM to be the input used for fuel injection corrections. It's possible Henrik was refering to this sensor input, and not the one on the manifold / compression tube. They both have the same name according to Mazda, so it would be easy to mix up. Anyway, it's not really relevant, but still something to know.
Dltreezan, do you still have thermowax & the BAC, or did you remove those?
Dltreezan, do you still have thermowax & the BAC, or did you remove those?
Well, the thread https://www.rx7club.com/showthread.p...&highlight=AIT talks about the intake manifold and how this guy used a ?? third gen sensor and wanted to know if this was Kosher or not.
And he talks about plugging it in which means it can't be the afm air intake sensor. And HENRIK knows which sensor because he says you can't connect it wrong.
Either HENRIK or Trubo2LTR also mention this sensor in another thread out there in regards to retardation of timing. I'm pretty sure of that. About 80% sure.
EDIT: Post #19 here: https://www.rx7club.com/showthread.p...ghlight=timing
#23
Well, the thread https://www.rx7club.com/showthread.p...&highlight=AIT talks about the intake manifold and how this guy used a ?? third gen sensor and wanted to know if this was Kosher or not.
And he talks about plugging it in which means it can't be the afm air intake sensor. And HENRIK knows which sensor because he says you can't connect it wrong.
Either HENRIK or Trubo2LTR also mention this sensor in another thread out there in regards to retardation of timing. I'm pretty sure of that. About 80% sure.
EDIT: Post #19 here: https://www.rx7club.com/showthread.p...ghlight=timing
And he talks about plugging it in which means it can't be the afm air intake sensor. And HENRIK knows which sensor because he says you can't connect it wrong.
Either HENRIK or Trubo2LTR also mention this sensor in another thread out there in regards to retardation of timing. I'm pretty sure of that. About 80% sure.
EDIT: Post #19 here: https://www.rx7club.com/showthread.p...ghlight=timing
#24
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But if the sensor was mangled up real bad and put out a resistance that was something like 300*F, then it would retard the timing....I reckon. Guessing.
So here's what you do. YOU go buy a variable resistor and connect it to the wiring for the sensor. Then go for a ride with something like a RTEK2.1 and drive along and turn the pot to output a higher temp/resistace and watch the timing on your Palm. Let us know what happens.
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