I have 180k on my 1995 Roadmaster and I am having injector issues. It started about a month ago I started having difficult cold starts. I replaced the fuel pump earlier in the spring with a Racetronix.
I did a pressure test and found the pressure gets to between 40-45 and starts to drop. The system looses pressure <2 minutes. Does anyone know if these Racetronix pumps have a check valve? When I initially replaced the pump I was not having issues. It was only after I put about 2000 miles on it when something started to seem off. I removed the fuel injectors and then cleaned them with pressurized carb cleaner. After flushing and back flushing, I put each injector in an ultrasonic cleaner with Seafoam for 10 minutes while actuating the injector with a pulse generator. I put everything back together and now the car went from hard starts, to flooding at starts and running with a miss.
My next idea is to remove the fuel rail again and prime the pump and check each injector for leaks. They were leaking before I cleaned them during this test but I did not re-test before I reassembled (cocky I fixed it). I have read in previous post people going to Cruzin Performance
for injector cleaning services and I sent Rich an email. I described the situation and he claimed that the original Multec injectors have reached the end of service life and I would be better off sourcing new ones. If the the original injectors on these cars are reaching the end of life then the other LT1 cars must be toward the end of the road as well. It seems more common on the other forums people injectors are starting to give up.
So now what? AC Delco injectors
are $80-$100 per injector. I like my Roadmaster for sure, but itself is reaching end of service life. Living in the rust belt does not help...
I have heard good reviews from this site and others on the ACCEL injectors
but again, this is $400! Anyone had good luck finding a cheaper source?