idles at 800 and revs to 1400..thats it

[snowshoveler]

Truck in question is a stock 99 with a 5 speed. Only mods are a fass lift pump and 1/2 inch lines.

 Like the title says the truck will idle fine and when you give it a bit of throttle it will jusm right to 1400. Nothing in between and nothing over.

My ECM was starting to fail,,,found a good used one along with an injection pump from a cracked 53 block.

Swapped it out today and still the same.

Sort of seems like the APPs but my DRB3 reads the apps and it says it goes from 0 to 100 percent just fine.

Any ideas...

Thanks Chris  

[dripley]

What does the DRBIII say for codes?

[Silverdodge]

Is it an auto ecm

[GSP7]

What is a auto ecm? 

 

Is that where you cycle the key and a code number shows on the dash instrument cluster?

 

I have a '99 so dont know how that works

[Marcus2000monster]

14 minutes ago, GSP7 said:

What is a auto ecm? 

 

Is that where you cycle the key and a code number shows on the dash instrument cluster?

 

I have a '99 so dont know how that works

I think he means a ECM for a Automatic tranny. 

[snowshoveler]

My scanner says there is a communication issue. I have previously tried the ECM from my 4x4 auto truck. Both 99s. It did not change. I put the ECM from the standard in the auto truck. It was not happy about it. Something about the anti stall feature in the standard trans ECM perhaps. The new to me ECM is from a standard.

[Marcus2000monster]

1 minute ago, snowshoveler said:

My scanner says there is a communication issue. I have previously tried the ECM from my 4x4 auto truck. Both 99s. It did not change. I put the ECM from the standard in the auto truck. It was not happy about it. Something about the anti stall feature in the standard trans ECM perhaps. The new to me ECM is from a standard.

whats the code?

[snowshoveler]

I forgot the code number...the scanner gives you a number and a brief explanation of it.

[Marcus2000monster]

5 minutes ago, snowshoveler said:

I forgot the code number...the scanner gives you a number and a brief explanation of it.

It would be helpful to us to know at least the code number. I would test for AC noise and also clean grounds. 

[Dieselfuture]

Unplug apps and see if it will idle normal, ecm controls idle, if it will go up it's ecm if not maybe something wrong with apps, ditch the factory style and get a timbo, no more problems. 

 

Edited March 3, 2018 by Dieselfuture

[Mopar1973Man]

Doubt its a APPS sensor...

 

Typically its a ECM when there do a limited rev. 

[snowshoveler]

I forgot the code number...the scanner gives you a number and a brief explanation of

[dripley]

Mine did that when the ECM went, except it did not stop at 1400.

[Mopar1973Man]

1 minute ago, snowshoveler said:

I forgot the code number...the scanner gives you a number and a brief explanation of

 

Most codes are not reported correctly on OBDII tools. Here is the correct definitions..

https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/obdii-error-codes_94/

 

[snowshoveler]

I am at it again.  Drb3 reports  p0238 and says that is map sensor voltage too high. 

P1689 and says no communication between ECM and injector pump module. 

You  couldn't ask for anything to start and idle any better. 

 

1 minute ago, Mopar1973Man said:

 

Most codes are not reported correctly on OBDII tools. Here is the correct definitions..

https://mopar1973man.com/cummins/articles.html/24-valve-2nd-generation_50/51_engine/obdii-error-codes_94/

 

 

[Mopar1973Man]

 

 

2 minutes ago, snowshoveler said:

I am at it again.  Drb3 reports  p0238 and says that is map sensor voltage too high. 

P1689 and says no communication between ECM and injector pump module. 

You  couldn't ask for anything to start and idle any better. 

 

 

 

Very rare indeed. Most here only dream of having DRBIII tool. 

[dripley]

Mine stared fine but would rev up and down on its own. If i touched the throttle it would start climbing in rpm until i shut it down.

[snowshoveler]

I am not gonna brag...cause I would have trouble changing a lightbulb without my friends...but I bought the DRB for 100 bucks a few years ago.

[Mopar1973Man]

Just now, snowshoveler said:

I am not gonna brag...cause I would have trouble changing a lightbulb without my friends...but I bought the DRB for 100 bucks a few years ago.

 

Those are like $3,000 tools! You stole that! 

[snowshoveler]

The only problem is...I am too far from you guys to learn much from it. I would love to be within an hour or 2 of some of you. 

The knowledge here is amazing.

 Chris