Perhaps approved by the same executive as the clown who approved of the plastic intake manafold gasket concept, GM did it again on the GM 1999 Lumina 3.1 V6 and other motors by selecting plastic for use in the fuel injection spray nozzles. However, special assists go to the idiots that made the fuel injectors so hard to get to, so hard and expensive to clean, and so hard and expensive to test, rebuild, and/or replace. Google.com lists several fuel injector ultrasonic cleaning services that charge about $90 all told for cleaning. On/off labor is at least $500 to remove the injectors to mail out for cleaning. You are looking at $75-150 each to replace individual injectors that are too far gone to clean/rebuild. They are under 1200 lbs of fuel pressure which blasts you like a fire extinguisher with raw gasoline unless you have the foresight (or you've read the manual) to depressurize the system before working on it. Fortunently I was wearing my $300 presciption plastic eyeglasses at the time. Talked to mechanics it is a routine problem.
Perhaps approved by the same executive as the clown who approved of the plastic intake manafold gasket concept, GM did it again on the GM 1999 Lumina 3.1 V6 and other motors by selecting plastic for use in the fuel injection spray nozzles. However, special assists go to the idiots that made the fuel injectors so hard to get to, so hard and expensive to clean, and so hard and expensive to test, rebuild, and/or replace. Google.com lists several fuel injector ultrasonic cleaning services that charge about $90 all told for cleaning. On/off labor is at least $500 to remove the injectors to mail out for cleaning. You are looking at $75-150 each to replace individual injectors that are too far gone to clean/rebuild. They are under 1200 lbs of fuel pressure which blasts you like a fire extinguisher with raw gasoline unless you have the foresight (or you've read the manual) to depressurize the system before working on it. Fortunently I was wearing my $300 presciption plastic eyeglasses at the time. Talked to mechanics it is a routine problem.
- Greg H., Glencoe, IL, US