Vehicle: 98 Chevy Cavalier Bi-fuel
Gas mode: (by removing cng fuse from under hood) runs fine
CNG MODE: When we try to start the vehicle with the fuse in we can get it to start for about 2 seconds at a time in between many cranks and only about half the time.
Here is what we have done (I'm writing in definitions just in case I am wrong as to their meanings):
We have verified that gas comes (with fair pressure) all the way up to the low pressure regulator(the round box under the hood just before the square computer box)
After attempting many tests we finally toke a known good low pressure regulator, and a known good computer box (square box under the hood with large wire connector that plugs into it) and a known good wire (the wire that connects to 2 places on the computer box and solenoid valve (the one just before the low pressure regulator). We have also changed the spark plugs and verified that they are firing during our tests. Any suggestions?
Gas mode: (by removing cng fuse from under hood) runs fine
CNG MODE: When we try to start the vehicle with the fuse in we can get it to start for about 2 seconds at a time in between many cranks and only about half the time.
Here is what we have done (I'm writing in definitions just in case I am wrong as to their meanings):
We have verified that gas comes (with fair pressure) all the way up to the low pressure regulator(the round box under the hood just before the square computer box)
After attempting many tests we finally toke a known good low pressure regulator, and a known good computer box (square box under the hood with large wire connector that plugs into it) and a known good wire (the wire that connects to 2 places on the computer box and solenoid valve (the one just before the low pressure regulator). We have also changed the spark plugs and verified that they are firing during our tests. Any suggestions?
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