Cel 0304, 0172, 0174

[supafly]

2000 LS 3.9 v8. It started out with just the 0304 code last week, so I changed plugs and COP's($400). Still running rough. All the injectors are getting power signals. Also, 2 months ago, I had to repair a cracked fuel line at the elbow connecting to the inlet side of the fuel filter. Changed the filter too. haven't checked fuel pressure yet going to get a tool later maybe. I've never messed with fuel delivery systems much, so it's new to me. Am I going the right direction?

 

[joegr]

Maybe, but it looks more like an air leak of you jumped time on one of the cams.

 

[supafly]

Jumped time on one of the cams...hmm. Ok. so how can i tell if timing is off. I assume it is similar to the 4.6 v8 I had on my mustang I had to rebuild. chains on front of engine behind some sort of oil jacket. are there timing markings?... I got the time and space to do this if I have to.:shifty:

 

[joegr]

Jumped time on one of the cams...hmm. Ok. so how can i tell if timing is off. I assume it is similar to the 4.6 v8 I had on my mustang I had to rebuild. chains on front of engine behind some sort of oil jacket. are there timing markings?... I got the time and space to do this if I have to.:shifty:

Search this forum. There's much info here.