High RPM's on CNG causing bogging and backfire.
I am having a backfire issue only when the RPM's are over 5000. For example, when driving up a hill and having to pass a vehicle, I step on the gas and the car kicks down into a lower gear and then feels as if it is bogging down and is very loud and shakey. The 5000 or above RPM is only reached when I have to step on the gas around 50 MPH to 65 MPH. I have blown 2 air filter covers and replaced the plugs inbetween blowing the last cover. I didn't replace the wires because they looked almost new. Has anyone experienced something similar or can anyone explain why I can't run on CNG at or above 5000 RPM? I let the CNG run out and tried the same thing on gasoline and the car would bog down and shake a little at that high RPM but no backfire. Any ideas?
Thanks in advance.
So sorry, I was so caught up with the problem I forgot the details. 2001 Chevy Cavalier, 126k miles, 2.2L engine and runs great when I don't have to go over 5000 RPM.
I hope this helps.
Thanks!
I am having a backfire issue only when the RPM's are over 5000. For example, when driving up a hill and having to pass a vehicle, I step on the gas and the car kicks down into a lower gear and then feels as if it is bogging down and is very loud and shakey. The 5000 or above RPM is only reached when I have to step on the gas around 50 MPH to 65 MPH. I have blown 2 air filter covers and replaced the plugs inbetween blowing the last cover. I didn't replace the wires because they looked almost new. Has anyone experienced something similar or can anyone explain why I can't run on CNG at or above 5000 RPM? I let the CNG run out and tried the same thing on gasoline and the car would bog down and shake a little at that high RPM but no backfire. Any ideas?
Thanks in advance.
So sorry, I was so caught up with the problem I forgot the details. 2001 Chevy Cavalier, 126k miles, 2.2L engine and runs great when I don't have to go over 5000 RPM.
I hope this helps.
Thanks!
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