1994 corvette hesitation
I have a hesitation and have had this problem several times with varying symptoms. this time I am kinda stumped. The car doesn't turn on its check engine light and runs like it has a bad tank of gas. Idles a lil rough but when you give it trottle it seems to be... a few cylinders short, runs ok at full throttle but pings. (and heads for ditch) lol Have recently changed the oxygen sensors as they were bad (checked with a scan tool). no codes no info from scan tool. what could cause this to happen and not throw a code. mass air is not new but has less than 50k in it same with water pump and optispark, there are no leaks I can see near the opti-spark so I think Its ok. The car itself has 187k on it ussually runs great no knocks and good compression on all cylinders.