bluthndr
New member
- Joined
- Mar 16, 2008
- Messages
- 139
Of course, a P1093 - no power above 2K or so, but will run higher if you give it room. I am mostly a Cummins guy but have a decent level of ability with drivability. I have been reading up on this ('net, and Mitchell, and Snap-On, and TSBs) but can't sort it out. I have plenty of tools and Snap-On and factory HD (not Tech 2) scan tools at my disposal...
Anyways, it does have the p1093 code for low rail pressure on power enrichment:
Not sure where the "vacuum test port" is but I could not see anything restricted on visual inspection of the lines.
At this point I guess it could be:
I plan on checking the vacuum thing tomorrow, but I am annoyed not being much closer than I was 4 hours ago...
Any other ideas? We are talking way too much money to guess at...
Again, not a DMax guy, but hopefully someone can help me pin the tail on the donkey (no insult intended).
Thanks in advance to all the guys out there smarter than me on these...:redx:
Anyways, it does have the p1093 code for low rail pressure on power enrichment:
- If I command the pressure up at idle the actual keeps up to spec (160 des = 140 act), same thing if I floor it in park (actually pressures match even better).
- New fuel filter, no change.
- Older oil change, no fuel in oil, oil level ok.
- If I clear the code it comes back first time I drive it and lean on it, but I can get the pressure to spike to over 170 at least once or twice before it trips the code and goes into limp - then it seems like rail pressure flattens out (low) above 2000 RPM and will NOT come even close to desired.
- Also does not want to upshift after code is set, but this may be common with this code?
- No program at this time but used to have a bullydog program before all this happened.
Not sure where the "vacuum test port" is but I could not see anything restricted on visual inspection of the lines.
At this point I guess it could be:
- Injectors (common problem but the attainable high rail pressure makes me think not).
- A CP3 pump???
- An internally collapsed line (not firggin likely at all but not impossible)
- A "Fuel/Rail Pressure Control Valve?" (but it seems on LB7 trucks this is rare?)
I plan on checking the vacuum thing tomorrow, but I am annoyed not being much closer than I was 4 hours ago...
Any other ideas? We are talking way too much money to guess at...
Again, not a DMax guy, but hopefully someone can help me pin the tail on the donkey (no insult intended).
Thanks in advance to all the guys out there smarter than me on these...:redx: