Gen 2 Map sensor Flakey

[astiles357]

Hi Guys, I have been learning alot about my cummins from reading these forums. This is my first post, so please forgive me if this topic has been covered.

Background:

I finally got my quad adrenaline board replaced and I had no boost pressure. I replaced the map harness because there were a couple butt splices in the wiring and presumed that was the problem. Once I changed the harness I have a boost reading on my control pod of 48-51 pretty consistently no matter TP, speed, ect. I did some reading on here and found out some map sensors "Fail High", which seems to correspond to my issue and also gives good reason to my poor mileage 8-10 mpg. Occasionally when I start the truck up the boost starts at 0 and will go up to 20 or 21 depending on throttle, ect. But usually goes right back to 48-51 upon restart.

I ordered a map sensor from Advanced Auto for $135 with a 25% online coupon and when I received it the connector was more oval shaped than the one on the truck, so I returned it. I called the dealer today and found out that they sell a Boost Sensor and a wiring harness for $370 something. The parts guy didn't know much so that is why I am here.

Assumptions:

1. I am currently assuming the Map sensor is still bad even though it occationally works.

2. I am assuuming cummins has updated this sensor with a new connector style and requires the new harness to connect.

 

Questions: 

1. Is it normal for a map sensor to sometimes work and sometimes not being either/or on start condition? Or is this an electrical issue?

2. Are my assumptions correct about the new connector type and require a harness?

3. Recommendations for sensor and harness? Or old style sensor connector?

 

Below is picture of Old sensor on the left and new sensor on the right.

 

Thanks in advance!

 

 

 

[Guest 04Mach1]

19 minutes ago, astiles357 said:

Hi Guys, I have been learning alot about my cummins from reading these forums. This is my first post, so please forgive me if this topic has been covered.

Background:

I finally got my quad adrenaline board replaced and I had no boost pressure. I replaced the map harness because there were a couple butt splices in the wiring and presumed that was the problem. Once I changed the harness I have a boost reading on my control pod of 48-51 pretty consistently no matter TP, speed, ect. I did some reading on here and found out some map sensors "Fail High", which seems to correspond to my issue and also gives good reason to my poor mileage 8-10 mpg. Occasionally when I start the truck up the boost starts at 0 and will go up to 20 or 21 depending on throttle, ect. But usually goes right back to 48-51 upon restart.

I ordered a map sensor from Advanced Auto for $135 with a 25% online coupon and when I received it the connector was more oval shaped than the one on the truck, so I returned it. I called the dealer today and found out that they sell a Boost Sensor and a wiring harness for $370 something. The parts guy didn't know much so that is why I am here.

Assumptions:

1. I am currently assuming the Map sensor is still bad even though it occationally works.

2. I am assuuming cummins has updated this sensor with a new connector style and requires the new harness to connect.

 

Questions: 

1. Is it normal for a map sensor to sometimes work and sometimes not being either/or on start condition? Or is this an electrical issue?

2. Are my assumptions correct about the new connector type and require a harness?

3. Recommendations for sensor and harness? Or old style sensor connector?

 

Below is picture of Old sensor on the left and new sensor on the right.

 

Thanks in advance!

 

 

 

By looking at the picture I think Advanced gave you one from another year. If you are near a Cummins dealer or even a truck dealer like Freightliner or Peterbilt that deals with Cummins you will get a better deal than messing around with Dodge dealers selling the exact same parts with a Mopar sticker covering the Cummins sticker.

[dripley]

They definitely quit making the 02 style and an adapter harness is needed. I have one on mine but dont remember where I got it. But I do know $370 from the dealer is a rip off. 

[astiles357]

Just the harness from the dealer was 60 some dolars. I figured maybe buying the harness from the dealer and buying the sensor somewhere else. Unless I can get the harness somewhere else as well. 

[dripley]

Check this out. Pretty sure this is where I got mine. Just been to long ago to remember.

https://www.rockauto.com/en/catalog/dodge,2002,ram+2500+pickup,5.9l+l6+diesel+turbocharged,1440064,fuel+&+air,manifold+pressure+(map)+sensor,11207 

 

One comes with the adapter. You can also check with Cummins but I dont think the OE is still available any more.

Edited October 25, 2018 by dripley

[Guest 04Mach1]

So after a little research I found Cummins updated the MAP sensor for 2002.

 

You'll need Cummins part numbers:

4921505 - approximate cost $110

3104228 - approximate cost $25

 

So with genuine Cummins parts your looking at about $135.

[astiles357]

dripley and 04Mach1,

You guys are awesome! Thanks.

[Mopar1973Man]

Rockauto has the MAP sensor for 79 bucks. Or 87 bucks with adapter harness. Might look over there. Ditch the Cummins name save a bit more.

[astiles357]

The pictures on rock auto don't match the description. P/N: AS370 has pictures of sensor and harness for $87, but Description says sensor only. P/N: AS370K has just picture of sensor, but description says Sensor Kit, Includes Harness for $149. Looks like Geno's Garage has both the cummins parts for $111. Don't misunderstand, I am not necessarily looking for the cheapest initial cost.

Anybody experience the aftermarket sensors outlast the Cummins sensors, disregarding the $30 ebay parts?

[Mopar1973Man]

Basically, you looking to buy a 2001 MAP sensor. 2002 MAP sensors were discontinued.

[dripley]

35 minutes ago, astiles357 said:

The pictures on rock auto don't match the description. P/N: AS370 has pictures of sensor and harness for $87, but Description says sensor only. P/N: AS370K has just picture of sensor, but description says Sensor Kit, Includes Harness for $149. Looks like Geno's Garage has both the cummins parts for $111. Don't misunderstand, I am not necessarily looking for the cheapest initial cost.

Anybody experience the aftermarket sensors outlast the Cummins sensors, disregarding the $30 ebay parts?

Pretty sure they have those backwards from reading the descriptions. I do have one of the SMP in mine and has been for several years. It works just fine. But looking at @04Mach1's post the Cummins is cheaper. That was not the case when I bought mine. It was a lot more back then and thats why I went with the SMP.