Dead spot

[jenkins]

I have 03 chevy afe intake, bully dog power pup and working at mine site pulling a gooseneck trailer with 257B and a bundle of 5 inch posts with a honda four wheeler on the trailer, went I hit the bottom of the hill doing 5 mph the motor will not pull past 1500 rpms unless I put it in four low. I would think that the truck should pull through that. any Ideas

 

[BoostN]

I have 03 chevy afe intake, bully dog power pup and working at mine site pulling a gooseneck trailer with 257B and a bundle of 5 inch posts with a honda four wheeler on the trailer, went I hit the bottom of the hill doing 5 mph the motor will not pull past 1500 rpms unless I put it in four low. I would think that the truck should pull through that. any Ideas

When is the last time you changed your fuel filter? Is it throwing any check engine lights?

 

[tracker954x4]

Like jeff said, the fuel filter is always a possibility.

Are there any "Reduced Engine Power" messages displayed or is the check engine light on? Check to see if there are any DTC's stored, they could shed some light on to whats going on here.

 

[jenkins]

changed

Have changed it 4 days ago and still have same problem

 

[jenkins]

Have changed it 4 days ago and still have same problem

no check engine light but does send a code po1621 and i am having hard time finding what it is.

 

[BoostN]

P1621 PCM Memory Perf.

That's what I show for it.

Here is a link to all the codes: Diesel Haulin DTC Codes

 

[tracker954x4]

Looks like you have an ecm failure

xTooltipElement

Service Information




2003 Chevrolet Chevy K Silverado - 4WD | Sierra, Silverado (VIN C/K) Service Manual | Document ID: 864685
DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610
<A href="#ss1-864685">Description

This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.
<A href="#ss2-864685">Test Description



The number below refers to the step number on the diagnostic table.

1. A DTC P0602 indicates the ECM is not programmed.

Step
Action
Yes
No
1
Did you perform the Diagnostic System Check-Engine Controls?
Go to Step 2
Go to [URL="http://www.dieselhaulin.com/forums/cellHandler.do?cellId=63614&refDoc=864685&from=sm"]Diagnostic System Check - Engine Controls
2
Is DTC P0602 set?
Go to Step 3
Go to Step 5
3
Program the ECM. Refer to Service Programming System (SPS) in Programming.
Does DTC P0602 reset?
Go to Step 4
Go to Step 6


4

1. Ensure that all tool connections are secure.
2. Ensure that the programming equipment is operating correctly.
3. Ensure that the correct software/calibration package is used.
4. Attempt to program the ECM. Refer to Service Programming System (SPS) in Programming.

Does DTC P0602 reset?
Go to Step 5
Go to Step 6
5
Replace the ECM. Refer to Engine Control Module Replacement .
Did you complete the replacement?
Go to Step 6
--


6

1. Clear the DTCs with a scan tool.
2. Turn OFF the ignition for 30 seconds.
3. Start the engine.

Did the DTC fail this ignition?
Go to Step 2
Go to Step 7
7
Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?
Go to Diagnostic Trouble Code (DTC) List
System OK

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