Hotwire or Karman Mass Air does anyone know how to test for them
08-07-2008, 01:45 PM
#1
Hotwire or Karman Mass Air does anyone know how to test for them
We are tring to figure out what this truck uses for a mass air Hotwire or Karman for wiring in the SAFC does anyone know how to ditermine what the truck has.
2001 Suzuki Grand Vitara 2.5L V6 H25 is the motor code.
Uses a mass air and map sensor
We are boosting the truck soon.
2001 Suzuki Grand Vitara 2.5L V6 H25 is the motor code.
Uses a mass air and map sensor
We are boosting the truck soon.
08-07-2008, 05:06 PM
#2
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Re: Hotwire or Karman Mass Air does anyone know how to test for them (JDMCRX)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX »</TD></TR><TR><TD CLASS="quote">We are tring to figure out what this truck uses for a mass air Hotwire or Karman for wiring in the SAFC does anyone know how to ditermine what the truck has.
2001 Suzuki Grand Vitara 2.5L V6 H25 is the motor code.
Uses a mass air and map sensor
We are boosting the truck soon.</TD></TR></TABLE>
Hot wire has a hot wire in it (duh). It hangs in the airflow usually. Karman has a mirror in it I think but I don't remember.
2001 Suzuki Grand Vitara 2.5L V6 H25 is the motor code.
Uses a mass air and map sensor
We are boosting the truck soon.</TD></TR></TABLE>
Hot wire has a hot wire in it (duh). It hangs in the airflow usually. Karman has a mirror in it I think but I don't remember.
08-07-2008, 05:59 PM
#3
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KVF sensor makes a digital oscillation. So place your DMM in Hertz and check it. The higher the frequency the more the flow.
It works on the principle of a IR emitter and detector. The air flow "tumbles" across a predetermined path. Behind the path, a mirror is suspended with what looks like a rubber band. When air flows, the tumble flips the mirror back and forth. The emitter is always emitting the IR beam. The detector will close the circuit when the IR beam reaches it and this happens when the mirror lines right upto it. The problem with these systems happens with cams. The air flow across this type of meter is really designed one way. Aggitation on a large cammed engine becomes a problem. Some of these also use a circuit to make the voltage linear to the air flow.
Hot wire is a simple 12volt or 5volt sense wire. The higher the voltage the more the flow. They work on a set voltage and current monitoring. As the air flow goes across the meter the resistance changes. The circuit within the unit changes the transistor based output to a linear output.
These circuits in the MAF meters are very sensitive to electricity so never ever measure resistance as most of them are considered solid state. The best way is to determine which type it is by measuring voltage across the signal wire and if it doesn't vary much as the engine is reved, the next option is frequency measurement.
It works on the principle of a IR emitter and detector. The air flow "tumbles" across a predetermined path. Behind the path, a mirror is suspended with what looks like a rubber band. When air flows, the tumble flips the mirror back and forth. The emitter is always emitting the IR beam. The detector will close the circuit when the IR beam reaches it and this happens when the mirror lines right upto it. The problem with these systems happens with cams. The air flow across this type of meter is really designed one way. Aggitation on a large cammed engine becomes a problem. Some of these also use a circuit to make the voltage linear to the air flow.
Hot wire is a simple 12volt or 5volt sense wire. The higher the voltage the more the flow. They work on a set voltage and current monitoring. As the air flow goes across the meter the resistance changes. The circuit within the unit changes the transistor based output to a linear output.
These circuits in the MAF meters are very sensitive to electricity so never ever measure resistance as most of them are considered solid state. The best way is to determine which type it is by measuring voltage across the signal wire and if it doesn't vary much as the engine is reved, the next option is frequency measurement.
08-08-2008, 09:21 AM
#6
Re: Hotwire or Karman Mass Air does anyone know how to test for them (JDMCRX)
Well checked it out i got a 0-5V refernce. I hook it up 0 corrections i can not rev it up at all. The input and put put are the same.
Modified by JDMCRX at 7:52 PM 8/8/2008
Modified by JDMCRX at 7:52 PM 8/8/2008
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