Dear Sprinter-Forum Members,
My 2005 Dodge Sprinter 3500 SHC (4.11 differential) accumulated about 158,000 miles. I noticed a gradual increase in engine noise, like a knocking sound, particularly at about 2000-2500 rpm. At first, I simply dismissed it as common diesel noise. My van started and ran perfectly. Fuel mileage was fine, typically 17 - 20 mpg. There was no real indication anything was wrong other than the sound. But as I researched diesel fuel injectors I learned of the importance of testing for proper calibration. I also learned of the disastrous consequences of improperly functioning fuel injectors.
Luckily, I live near Express Diesel USA, Inc., the only Bosch Diesel Center in San Diego (www.expressdiesel.us). I paid them a visit to check out their facility. It is state-of-the-art! They have a Bosch EPS815 Test Bench. The staff was friendly, knowledgeable, and gave me a brief tour of the facility. They showed me a sample printout from the test. They test injectors for $60 a piece, if you bring the injectors to them. Turnaround is generally a few days. So for $300 and peace of mind, I figured I'd get them tested. Highly recommended!
Luckily, I also live near Sprinter Pit Stop, a sensational repair shop dedicated solely to Sprinters. I asked them to remove my injectors, take them to Express Diesel USA, report the test results, and then go from there. It turned out that 4 of 5 injectors failed testing! I opted for fully-rebuilt, factory-certified, warranted fuel injectors. Sprinter Pit Stop installed them with new hold-down bolts and copper seals. They programmed the ECM with the IMA codes.
The end result was surprisingly good! I say surprisingly because I didn't really know how injector calibration would affect the sound or performance of the engine. The newly rebuilt injectors dramatically improved the engine noise - it sounds like it did when it was new! It also runs smoother and has more torque. I wholeheartedly recommend you get your injectors tested! You'll be glad you did.
I also found the Bosch printout to be rather confusing and hard to interpret. To make it easier to interpret, I generated graphs of the results. My graphs are easy to interpret (see *.PDF attachment).
Warmest regards,
Jon
My 2005 Dodge Sprinter 3500 SHC (4.11 differential) accumulated about 158,000 miles. I noticed a gradual increase in engine noise, like a knocking sound, particularly at about 2000-2500 rpm. At first, I simply dismissed it as common diesel noise. My van started and ran perfectly. Fuel mileage was fine, typically 17 - 20 mpg. There was no real indication anything was wrong other than the sound. But as I researched diesel fuel injectors I learned of the importance of testing for proper calibration. I also learned of the disastrous consequences of improperly functioning fuel injectors.
Luckily, I live near Express Diesel USA, Inc., the only Bosch Diesel Center in San Diego (www.expressdiesel.us). I paid them a visit to check out their facility. It is state-of-the-art! They have a Bosch EPS815 Test Bench. The staff was friendly, knowledgeable, and gave me a brief tour of the facility. They showed me a sample printout from the test. They test injectors for $60 a piece, if you bring the injectors to them. Turnaround is generally a few days. So for $300 and peace of mind, I figured I'd get them tested. Highly recommended!
Luckily, I also live near Sprinter Pit Stop, a sensational repair shop dedicated solely to Sprinters. I asked them to remove my injectors, take them to Express Diesel USA, report the test results, and then go from there. It turned out that 4 of 5 injectors failed testing! I opted for fully-rebuilt, factory-certified, warranted fuel injectors. Sprinter Pit Stop installed them with new hold-down bolts and copper seals. They programmed the ECM with the IMA codes.
The end result was surprisingly good! I say surprisingly because I didn't really know how injector calibration would affect the sound or performance of the engine. The newly rebuilt injectors dramatically improved the engine noise - it sounds like it did when it was new! It also runs smoother and has more torque. I wholeheartedly recommend you get your injectors tested! You'll be glad you did.
I also found the Bosch printout to be rather confusing and hard to interpret. To make it easier to interpret, I generated graphs of the results. My graphs are easy to interpret (see *.PDF attachment).
Warmest regards,
Jon
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