can't figure out code CRL P0101, I've tried everything please help? ???

Question

I've tried everything I can think of. I can't keep buying things hoping they work. What next? Map sensor? Maf wiRe harness? I replaced maf sensor, o2 sensors, plugs, plug wires, cleaned throttle body, air filter, new fuel filter, it's still throwing code p101 and has very rough idle like it's missing.

Answer 1

P0101 MAF (mass airflow) circuit range / performance problem

When there is a rough idle with a MAF range problem this necessarilly does not mean that the MAF is faulty, what happens is the rough is taking the MAF outside it ability to control its engine management or range. The rough idle which is a misfire is causing the MAF to code. What causes the MAF to go out of its range would be fuel related issues such as the fuel injector and low fuel pressure, and timing issues,  If the problem where ignition related you would have a P0300 code and the cylinder that is doing the misfire. Check the sparkplug note any that are wet and that would be the suspected cylinder, you should also check the fuel pressure regulator vacuum port for any fuel leaking out of its vacuum port and into the intake manifold