2001 No MAP Sensor after Quadzilla Installation

[int3man]

Hi All,  So I thought that my issue was no 5 volt power to the MAP and Oil Pressure sensor.  So I pulled the harness out and gutted it.  Found the joint and it measured 1K ohms from ECM to sensors.  Reinstalled and reconnected.  Measured 5 volts on the (IQuad) red wire that plugs into the MAP Sensor.  IQuad shows no boost!   Check engine light is on.  Manual says that might be normal for 3 or 4 key cycles.  I'll drive it some more after I see what the oil leak is all about.  Man I can not catch a break!!

 

Thanks for any advice.

Michael

Edited December 9, 2018 by int3man

[Mopar1973Man]

All wires should be 0 ohms. A max of 5 ohms. Anything past 5 ohms calls for repair of that wire. 

[int3man]

1 minute ago, Mopar1973Man said:

All wires should be 0 ohms. A max of 5 ohms. Anything past 5 ohms calls for repair of that wire. 

Right you are.  But I'm not showing any Boost and I have 5 volt reference voltage at the MAP sensor wire.  And I thought that would fix my oil pressure sensor, same 5 volt reference and it didn't fix it.  Gauge tests good with a cluster test.

 

Michael

[Mopar1973Man]

18 minutes ago, int3man said:

Found the joint and it measured 1K ohms from ECM to sensors.

 

That 1k ohm resistance needs to go away. 

[int3man]

I fixed it.  And now I still have issues and Thus my confusion.  ( I posted under oil pressure gauge no response.)  I'll try again tomorrow.

 

I was just fishing if someone else had issues after installing IQuad.  

 

Thanks!

[Mopar1973Man]

So now remember the oil pressure sensor and/or MAP sensor failure can drag them both down. Do you have any errors currently?

[int3man]

15 hours ago, int3man said:

Right you are.  But I'm not showing any Boost and I have 5 volt reference voltage at the MAP sensor wire.  And I thought that would fix my oil pressure sensor, same 5 volt reference and it didn't fix it.  Gauge tests good with a cluster test.

 

Michael

Just ran the ODBEC Scanner and it is only reporting an over voltage on the MAP sensor.  So apparently it had adjusted down to the voltages as they evolved.  I guess I'll drive it at this point and see if the Oil Pressure gauge and MAP sensor come around.  Checked the Blue Tooth ODBEC Reader and it is reporting a P0237.  So hopefully the ECM just needs to relearn the running voltage.

Edited December 9, 2018 by int3man

[int3man]

O.K.  So I got my head out of the clouds (head cold).  Had a senior moment.  I went looking for and a found a +5 v reference voltage shortage.  I should have at the same time tested for and looked for a poor ground reference!  Now I have to go back into the loom and look for that after I meter it at the plug.  I tested between the Battery and +5 v on the MAP plug but I didn't measure the critical measurement across the pins in the plug.  I'm willing to bet that I will find no ground or a crappy one at best.

 

Two sides to a coin.  And three connections to our sensors.

Will work on it this weekend.

Michael