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Old 11-17-2011, 03:57 PM
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Boost problem???

Alright I just finished up swapping out my injector in the truck and got it all back together. When I got it started and warmed up good I revved it up just to make sure that everything was ok I guess and the boost gauge was only reading about 15 psi tops. I was just wondering if this was ok or is there a problem I read somewhere that it should be about 20 or so I believed? It doesn't have the CAI on it right now just the pipe that connects to the turbo if that has anything to do with it and the previous owner placed the hose for the boost gauge in the pipe going to the intake elbow in front of the EGR valve. Could this be a bad spot for measuring the boost? Thanks in advance and just took take away all questions yes I'm a newb in the diesel world always meesed with gas engines so its all new to me.
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Old 11-17-2011, 04:05 PM
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Boost gauge connection at elbow is the best place for it.

Are you reving the motor in park or are you driving?

Were the batteries disconnected for a prolong time, you might want to try the VGT relearn, If you have an early '04 truck with '03 motor, not sure if this works for the '04 motor.

Compliments of Bismic,
KAM (keep-alive-memory) reset & VGT learn procedure
1. Drive the truck until the engine and transmission have reached normal operating temperature.
(The VGT learn procedure requires that the oil and coolant temperatures be at normal operating temperature)
2. Flash truck back to stock (Only need to do this if running a tuner or module)
3. Turn on the headlights
4. Disconnect both batteries
5. Short out + to - battery cables to each other (Make sure both batteries are disconnected before doing this).
6. Let truck sit like this for 10-minutes
7. Turn off the headlights.
8. Re-connect batteries
9. Cycle the key to the run position twice. Pause in the “ON” position each time until the wait to start lamp goes out (minimum 5-seconds) and pause in the “OFF” position each time for 10-seconds to be sure the PCM has "gone to sleep".
10. Start the truck and let it idle for a minimum of 5-minutes at normal operating temperature. This allows the PCM to learn the EGR valve closed position value. Also you will likely hear the turbo pitch change several times during this period as the PCM learns the necessary duty cycles for accurate VGT control.
11. Complete the road test Drive Cycle:

15 miles of mixed driving (*should* be enough in most cases) to allow the PCM to "re-learn"
its adaptive strategy. Note: Anytime the batteries are disconnected, the PCM will throw the
P1000 code until the “Drive Cycle” is completed. As for the Tow/Haul mode, the transmission
must re-learn your driving style and loads hauled again as this was cleared when the truck was
re-flashed.
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Old 11-17-2011, 04:06 PM
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To really get boost you need to drive it and put it under a load. Or power brake it. Just idling revving it up won't do that much.
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Old 11-18-2011, 04:03 AM
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Yeah it was in neutral parked when I was revving it. The truck was down for about a week and a half so I'll have to try that for sure. It's an early 04 with the 03 problem child
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Old 11-18-2011, 06:36 AM
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Does the truck have to be running or turned off for the relearning process for the VGT?
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Old 11-18-2011, 07:15 AM
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Quote:
Originally Posted by 04psd250 View Post
Yeah it was in neutral parked when I was revving it. The truck was down for about a week and a half so I'll have to try that for sure. It's an early 04 with the 03 problem child
Yep, the turbo won't build maximum boost without putting a real load on it.
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Old 11-18-2011, 08:45 AM
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Ok I tried the KAM reset and took the truck out on the road now the truck doesn't want to build over 7 lbs of boost now? I changed the oil with T6 synthetic could the turbo be gummed up from the old oil or something?
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Old 11-18-2011, 01:28 PM
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Double check all your electrical connections and grounds. Your truck has been down for a period of time, there is a chance the vanes in the VGT are sticking, might need to clean turbo.

Without a good diagnostic scan tool to monitor what's going on, you might be throwing parts at it.

Here is the VGT diagnostic procedure.
http://www.forddoctorsdts.com/articl...argerGuide.pdf
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Old 11-18-2011, 01:31 PM
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Send a message via AIM to Galaxie
Drive it.


Sent from my iPhone using Autoguide
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Old 11-18-2011, 04:22 PM
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Well I have a diablo sport and I ran the scan on it and the KAM code came up along with the EGR but I deleted the valve so that's understandable and the drive cycle came up also but other than that nothing. I guess I'll just have to try the procedure again tomorrow and if that doesn't work than I guess I'll tear the turbo apart for a good cleaning because honestly I doubt it has ever been taken apart and cleaned. The previous owner never done anything at all to the motor except change the oil it seems so I'd say it's past due for sure.
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