Friends 2000 5.3l 290K km has a few issues. First it was running rough, scanner showed it was running lean, a cylinder misfire and the o2 sensors had issues. Of course I didnt record the codes. The tb was cleaned, but not removed, battery disconnected. The egr cleaned and so was the maf. It ran better, threw the same codes and then began an intermittent start issue. It would crank, fire briefly and then stop. We kept it cranking and it continues to spark but wont fire again. I dont have a fuel pressure gauge but there seems to be pressure at the rails as it shoots out with some force. When it was idling its timing was jumping from 14 to 25 degrees and back frequently.
Now it wont start, the codes were wiped and it wont run to get them back again. I want to re-clean the tb with it removed but wondering what would cause a no start. Surely issues with the o2 sensors wouldnt cause the no start.
any thoughts?
thanks
Now it wont start, the codes were wiped and it wont run to get them back again. I want to re-clean the tb with it removed but wondering what would cause a no start. Surely issues with the o2 sensors wouldnt cause the no start.
any thoughts?
thanks