fuel map sensor no good

[rhino_50]

My fuel map sensor went out on my 03 ram today. Dealer is trying to say that my stacks caused this because there is no back preasure in the exhuast. Is this true our are they trying to hang the bill on me?I thought that the faster you got the hot air away from the turbo the better? PLEASE GIVE ME SOME ANSWERS THANKS GUYS FOR ANY HELP WOULD BE GREAT.

 

[Prairie Dog]

Jeez what a crock. Don't they have any idea how much damage they do customer loyalty when they do stuff like that?

 

[JWerkheiser]

Go back to your dealer wearing knee boots and have them explain it to you exactly how that could have caused it. Then tell them your "common sense-or" is working and it is telling you they are full of you know what. They must be some kind of con artists to try and get you to pay up.

 

[MMeier]

Mr. rhino, they are definitely blowing smoke up your wazoo, damn, just like my st ***er does to me!!!

 

[rbattelle]

Total crapola! I agree, ask them to explain exactly what function relates exhaust back pressure to fuel rail pressure. Ask them to cite a specific source, such as the 2003 service manual. They won't be able to, because there is no relation between exhaust back pressure and the fuel map sensor.



The thing that bothers me most about that kind of dealership behavior, is the thousands who are not members of this kind of forum who don't know any better and continue to provide them with business.

 

[Badunit]

Are we talking about the IAT/MAP sensor on the intake manifold or a fuel sensor? Not that it really matters, your dealer is still full of it.

 

[GLolas]

So what are the symptoms of a bad fuel map sensor? (Pardon the ignorance)

 

[rhino_50]

The truck has no power when you go to pull out . The engine lays down so to speak , but the engine stays running but at low idle. I hope no one else has this problem. Thanks to all loyal TDR members for the response back. I'm so gald to have people to ask questions about ram trucks with cummins engine in. You guys gave me some much needed confidence. THANKS RHINO 50

 

[nickleinonen]

the stea... er dealer is full of something. make them prove it if they push the issue. . turbo diesel engines operate better with less backpressure. . i believe the max recomended backpressure on turbo diesel engines post turbo is 2"H2O. that's less than 1 psi backpressure [about . 67 psi]

 

[Vaughn MacKenzie]

MY DEALER TOLD ME THE SAME THING (almost) when I took it in after it started smoking bad all the time. I don't have stacks but an Aeroturbine replacing the muffler.



Techie

"I think without the muffler it lets the air flow too fast. "

Me

"No, when it's idling all the fuel should be burning in the cylinder. It uses very little fuel at idle and therefore shouldn't smoke"

Techie

"Well I think the muffler catches most of the soot. "

Me

"No, when it's idling all the fuel should be burning in the cylinder. It uses very little fuel at idle and therefore shouldn't smoke"

Techie

"Well I've never seen one with a muffler like that so I don't have anything to compare it to. "







FORTUNATELY they checked it out and diagnosed it properly and replaced the ECM and everything's been fine ever since.



Scary, though, what they teach them in Dodge School



Vaughn

 

[rbattelle]

What they teach them at Dodge school:



"Any stickers installed on any windows anywhere on the truck voids the warranty due to the adhesive-backing, which causes excess air to collect on the glass, thereby causing insufficient fuel pressure leading to broken universal joints. Warranty coverage should be denied"

 

[Prairie Dog]

:-laf :-laf :-laf



I know what you mean, I'm afraid to take mine in for the buzzing throttle because they may notice I added air to my tires .

 

[rhino_50]

Just pick up my ram from the dealer. I just signed the papers and left. No hassels about stacks. On the way home a dodge 1500 gasser passed me and gave me thumbs up on the stacks. Stacks are cool!