Bad MAf m60b30

[gricey]

I have been chasing down a misfire that happens when the car is warm and I accelerate from a stop.

It does not appear to have any vacuum leaks and i have replaced all of the hoses anyway, along with a bunch of other stuff, Fpr, valve cover gaskets, plugs , plug boots and I did find a coil that was cracked, so i replaced that.

The car runs great first thing in the morning,but on the way home from work though it will start with this slight misfire and it starts to idle a little rough.

I have cleaned the ICV and it moves freely.

When i disconnected the maf nothing happened. Im pretty sure the car should run rough and maybe even die with it disconnected. i actually drove it home with no maf and it did great. better than usual.

I have never got a 1215 code though, i occasionally get one of the o2 codes like 1221 or 1212

So I am thinking it may be the MAF

[skylinergtr]

if you never got a maf code, then i suggest the o2 sensors have bit the bullet. Odd's are they are probably original. I know sometime last year my car was running exactly as you described. I replaced the maf (i did have a maf code), and still it was running rough. Once i replaced both o2 sensors with OE Bosch ones, the car was running great again.

[gricey]

Possibly, I did replace those about 10k miles ago. Shortly afterwards the head gasket blew though, and maybe they got contaminated then. I thin ill have a look at them.

I do have a spare 02 sensor as autozone ordered too many and just gave me the other one!

So the car should run when you disconnect the MAF?

[skylinergtr]

when i disconnect my maf now, the car will die. i think this suggests that its working