code p0303 1997 expedition

macandcre · **Joined:** Sat Jun 07, 2008 4:51 pm **Posts:** 2

have code p0303 on 1997 expedition. Have replaced all plugs and wires, coil, and fuel injector. Any other ideas?

Sponsored Links · **Joined:** 29 Jun 2004 08:12 pm **Posts:** N/A

jeff compton · **Posted:** Sun Jun 08, 2008 4:11 pm

yup the forums are full of them!

fuel injection center · **Joined:** Tue Sep 11, 2007 5:46 pm **Posts:** 191

Check engine compression, specially cylinder # 3, could be a cylinder leaking caused by blown gasket, manifold etc.
And also don´t forget to check fuel pressure.

macandcre · **Joined:** Sat Jun 07, 2008 4:51 pm **Posts:** 2

have now checked the pressure and it seems to be ok. Also replaced fuel filter...Now what?

jeff compton · **Posted:** Tue Jun 10, 2008 7:31 pm

now what?" I don't know maybe diag it!

fuel injection center · **Joined:** Tue Sep 11, 2007 5:46 pm **Posts:** 191

Continue by checking the engine compression, check if the compression in the cylinders matches more a less with the compression of cylinder # 3.

keep posted

code p0303 1997 expedition

Who is online