My 2000 bi-fuel Cavalier, which is still running so-so on CNG, has about 125 psi feeding the LPR, and that drops to about 110 psi upon engine loading. Also, the 1st LPR pressure port reads 3.0 psi . According to the manual, 115 & 4 psi are minimum, and, also according to the manual, I should first change the HPR filter.
So, what is a good source for the HPR filter kit?
Thanks in Advance,