We tried fuel injector cleaners, but they only work temporarily and changed spark plugs and that only helped a little. The engine light goes on and off at will and autozone could not read any codes. Any ideas?|||check if your exhaust is clogged. take your car to a repair shop, you may spend more money while you replacing parts.
possible mass air flow sensor|||sounds like cat converter is plugged up see under car when running if it is glowing or smells like rotton eggs if not or feel exhaust pressure is weak|||could be the tranny|||take off from the cat- back of exhaust if your speed improved 1 or 2 things you can do 1 replace the cat which wold run about $400 or 2 which might not pass emission test is to gut out the cat , find an exhaust pipe that fits in cat housing and get it welded then put exhaust back together