1g MAP sensor?

[wingspan99]

There is a sensor under the intake manifold on the driver side, above the knock sensor, maybe it's a MAP sensor, except there's no mention of it in the Haynes manual. I know the air filter has the barometric pressure sensor to measure altitude, Intake Air Temperature sensor, and MAF sensor, so is this thing a MAP sensor and will I be able to datalog it when my logger comes in next week? -Tom

 

[dave99gst]

Ptu ? does it look sort of like this ?

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[92_talon_awd]

That's the Power Transistor isn't it?

 

[marcmsj]

Our vehicle doesn't have a MAP sensor. It's probably the PTU as others have pointed out.

 

[illeffekt vr-4]

Yep 2g's have MAP sensors, not the 1g's.

 

[marcmsj]

Yep 2g's have MAP sensors, not the 1g's.

Sure about that?

 

[illeffekt vr-4]

Pretty sure they're only on the 2g's. Just ask the guys that swap 1g's into 2g's.

 

[marcmsj]

Pretty sure they're only on the 2g's. Just ask the guys that swap 1g's into 2g's.

No sir.. no MAP sensor on a 2g. They have MAF sensors just like 1g's

 

[Redwidow]

^Correct. The only MAP Sensor on a 2G is on the 420A Cars. 4G63 cars have only MAF sensors. But back to the OP the part that your talking about is the PTU.

 

[chico904]

2G's do have a MDP sensor, which is commonly mistakenly called the MAF sensor.

 

[snowborder714]

Incorrect. The sensor that is on top of the 2g intake manifold is an MDP (manifold differential pressure) sensor. This is different from a MAP (manifold absolute pressure) sensor.

 

[chico904]

^^^Sorry about that, I confused them. It throws me off, because when I got the cel for it on datalogger, it comes up MAP sensor, instead of MDP sensor.

 

[->PrOjEcTGS<-]

This got blown out of proportion

OP- Unless your car was converted to run on speed density you DO NOT have a MAP sensor and the item you are probably mistaking it for is the Power Transistor Unit as described previously.

 

[dave99gst]

you are probably mistaking it for is the Power Transistor Unit as described previously.

Basicly my point

 

[wingspan99]

I'll try to get a picture of it tomorrow, it only has two wires. I can see the power transistor unit, it is mounted on the block behind the timing belt cover. Maybe I can put the camera behind the manifold to shoot the pic.

 

[ilco187]

i use a GM 3bar map sensor for my safc but 1g's dont have one from factory 2g's do

 

[hubz91talontsi]

NO 2g's do not.

 

[ilco187]

its a mdp as almost same thing.

map for 2g.
http://partimages.genpt.com/partimages/264534.jpg

mdp for 2g.
http://partimages.genpt.com/partimages/93947.jpg

do you have the cyclone intake.

 

[buddahboost]

MAP - MANIFOLD ABSOLUTE PRESSURE
MDP - MANIFOLD DIFFERENTIAL PRESSURE


Does MDP log boost? I Dont think so

"I'm assuming the MDP sensor on these cars is the same as the DPFE sensor, or Delta Pressure Feedback EGR sensor used on Fords. Basicly it's there to make sure that the EGR is behaving properly in relation to engine vacuum.

In other words, it's to monitor EGR performance, so the ECU knows the EGR is opening and closing at the proper times, ie, assuring EGR is closed at idle, etc." - Nitrous pete of talk forums