Could I have injector problem and no smoking? As Low psi on couple of injectors
Could I have injector problem and no smoking? As Low psi on couple of injectors
The high pressure fuel system is common rail, so all injectors should have the same PSI. However, injectors can fail absent of smoke evidence. What did you find that brought the question?
I'm not really sure mech said I had low pressure at 2 injectors he showed me on screen while truck is running. What my truck is doing while at idle surging it's like a gas burner with large cam. And fuel mileage has dropped slightly.
The LLY injectors have been the most reliable of any Dmax to date. A surge/rolling idle is typically caused by a failing pressure regulator or major air in the system.
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2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
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2007 Chev K2500 Classic EC Short LT (Sold)
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2016 GMC K3500SRW D/A CC short LTZ
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You may be referring to "fuel rate". Balance is achieved when all 8 injectors produce a fairly low deviation from one another. I just had the injectors replaced in my LB7. The #2 injector was way out of tolerance, and was consistently setting P0302.
The FPR in my truck has always caused a small amount of surging at idle - it has done this for 100K miles. GM specifies a +/- 100 rpm or less at idle as not being a warrantable defect. Most Duramax fuel systems produce surge values lower than 100. I've not worried too much about the surge in my truck....
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You are probably 90% of the way there (regulator labor) when doing an injector job
Kennedy Diesel-owner
More than just a salesman-I use and test the products that I sell on a daily basis!
Superflow Lie Detector in house
2002 Chev K2500HD D/A CC Long LT 11.77@ 124mph at 7700# fuel only-e.t. needs help
2005 Chev K3500SRW D/A CC Long LT(SOLD)
2007 Chev K2500 Classic EC Short LT (Sold)
2012 GMC K3500SRW D/A CC Long LTZ Happy Birthday to me! Built 1 working day after my birthday and delivered 7 days later.
2016 GMC K3500SRW D/A CC short LTZ
Custom tuning in house using EFI Live tuning software!