Blazer runs bad

[tristoid77]

What is it when the check engine light comes on and then the Abs and the air bag lights come on, as you are pressing the accelerator( only in drive). The blazer runs like a champ in park, but that doesn't help me go anywhere.

 

Replaced

crank sensor

has been tuned up

fuel filter replaced

[Wingnut]

What code is it throwing?

 

If you don't have a scanner, most auto-parts stores, or quick-lube places will hook it up and scan it for free.

[tristoid77]

The funny thing is, is that it has been hooked up to a scanner and it isn't throwing any codes. A friend of mine works at Midas and he hooked it up to the diagnostic machine and once again no code. I saw in another forum a guy had a similar problem and it turned out to be the EGR sensor. Possibilty???

[tristoid77]

I had the Blazer scanned again it threw the code PO339 CKP sensor A intermittent. As I said before I had the crank sensor replaced, plugs, wires, cap and rotor replaced. What do you think????