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Question

I have a 2002 duramax 3500 with 190,000 miles. after i fueled it up one day it was very sluggish. I thought bad fuel and changed the fuel filter and have also run several several tanks through since then and still have the problem. the engine light is not on. I pulled the air intake apart to the turbo and spin the blades with no effert. any help would be great.

Submitted: 30 days and 9 hours ago.

Category: Chevy

Value: $15

Status: CLOSED

Year : 2002
Make : Chevrolet
Make (other) : silverado
Model : 3500
Engine : duramax

Already Tried:
fuel filter and air filter changes

Posted by sean 30 days and 9 hours ago.

Answer

hi i can help this is often caused by bad injectors ,but there are a few things to check first , these injectors are warrateed for 200k miles
Customer Concern: Loss of power and an Electronic Control Module (ECM) code: P1093. Vacuum level on supply line is normal.
Tests/Procedures: 1. Check the fuel supply line from the fuel filter to the injection pump for a kink.

2. Check for fuel in the engine oil. If so, replace the fuel injectors (all eight).

3. Check the fuel return rate from each bank of fuel injectors, engine cranking for 15 seconds with the engine 1 relay removed from the under-hood fuse block.

4. Should have less than 12 mL from each bank, left and right.

5. If more, replace the fuel injectors per TSB #04-06-04-007F.

6. Verify that vacuum on the fuel supply line is 5" or less at Wide Open Throttle (WOT) in P or N.

7. Disconnect the fuel pressure regulator electrical connector, check for maximum fuel pressure, near 23,000 PSI.
Potential Causes: Restricted Fuel Filter
Fuel Injectors
Restricted Fuel Pump Supply Hose
Tech Tips: See special policy #04039B and bulletin #04-06-04-007F. The special policy extends the injector warranty to 7 years/200,000 miles.

30 days and 8 hours ago.

Reply

all 8 fuel injecters were replaced at 160,000 miles. will they still fall under this warrenty

Accepted Answer

you will have to ask your very close to the 7 years

Accepts:
Expert:	sean
Pos. Feedback:	100.0 %
Answered:	10/23/2009

ASE Certified Technician

30 yrs experience ase cetified tech shop owner

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Customer Concern:	Loss of power and an Electronic Control Module (ECM) code: P1093. Vacuum level on supply line is normal.
Tests/Procedures:	1. Check the fuel supply line from the fuel filter to the injection pump for a kink. 2. Check for fuel in the engine oil. If so, replace the fuel injectors (all eight). 3. Check the fuel return rate from each bank of fuel injectors, engine cranking for 15 seconds with the engine 1 relay removed from the under-hood fuse block. 4. Should have less than 12 mL from each bank, left and right. 5. If more, replace the fuel injectors per TSB #04-06-04-007F. 6. Verify that vacuum on the fuel supply line is 5" or less at Wide Open Throttle (WOT) in P or N. 7. Disconnect the fuel pressure regulator electrical connector, check for maximum fuel pressure, near 23,000 PSI.
Potential Causes:	Restricted Fuel Filter Fuel Injectors Restricted Fuel Pump Supply Hose
Tech Tips:	See special policy #04039B and bulletin #04-06-04-007F. The special policy extends the injector warranty to 7 years/200,000 miles.