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Hi:
My friend picked up a 1991 Ford Taurus used about a year ago, but neither of us were aware of this forum's presence up until now. However, we're both starving students, but I have some experience fixing cars and want to help him fix it.
1. Every once in a while, the check engine light will come on and off while driving. What is the most common CNG-related reason for pulling a CEL?
2. I know that for an older Mazda, you can short-circuit a couple of lines and have the check engine light blink in sequence to reveal the code, but how is it done in a Ford? I ask because the stealership wants almost $80 to pull the code and AutoZone only has ODBII scanners
.
3. An everyday mechanic, without using a scanner tool, told him that the code was for running rich, but what is the proper air/CNG ratio (to kinda put a pun on A/F)?
4. Even before the CEL drama, his car feels relatively weak in power for a V6, notably poor acceleration (esp. when the car is in motion) and a bit of throttle lag. Is this because of the CNG setup, or was it because this car running too lean/rich even before the CEL?
5. How long does an average CNG converted vehicle with 2 big tanks in the trunk run on every refill? I can't remember how much, but I remember that his DTE (Distance To Empty) is roughly 200-300 miles.
I know that these questions kinda point towards running rich, but I just want to be sure I'm not leaving anything out?
My friend picked up a 1991 Ford Taurus used about a year ago, but neither of us were aware of this forum's presence up until now. However, we're both starving students, but I have some experience fixing cars and want to help him fix it.
1. Every once in a while, the check engine light will come on and off while driving. What is the most common CNG-related reason for pulling a CEL?
2. I know that for an older Mazda, you can short-circuit a couple of lines and have the check engine light blink in sequence to reveal the code, but how is it done in a Ford? I ask because the stealership wants almost $80 to pull the code and AutoZone only has ODBII scanners
.3. An everyday mechanic, without using a scanner tool, told him that the code was for running rich, but what is the proper air/CNG ratio (to kinda put a pun on A/F)?
4. Even before the CEL drama, his car feels relatively weak in power for a V6, notably poor acceleration (esp. when the car is in motion) and a bit of throttle lag. Is this because of the CNG setup, or was it because this car running too lean/rich even before the CEL?
5. How long does an average CNG converted vehicle with 2 big tanks in the trunk run on every refill? I can't remember how much, but I remember that his DTE (Distance To Empty) is roughly 200-300 miles.
I know that these questions kinda point towards running rich, but I just want to be sure I'm not leaving anything out?
" method of troubleshooting, make sure the spark plugs and wires are good , cng is harder to ignite than gasoline , then try a new 02 sensor. Older 02 sensors can get "lazy" ( work ok, but have a slow responce time). Good Luck.
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