[newman12fan]

Hi, I've been reading all night and haven't figured my problem out yet.
I have a 95 Jimmy 4x4 4.3 vortec engine automatic trans.
This miss problem actually started a few months ago. It sounds fine when first started, I can drive it about 5-10 minutes and I start feeling the miss at take off then it smooths out until 2000 rpm I took it to autozone and got the scanner put on it, the gentleman didn't tell me which codes it had but said it read #3 misfire and something with the egr valve.The miss is bad enough that it sounds like it's going to die, but hasn't yet. I did a total tune up and I removed the egr valve, cleaned it made sure the valve was moving freely, and put the screened egr vavle gasket back on (it ran bad a few years ago and the egr valve was gunked up and it fixed my problem so I thought it was worth a try). But the tune up, and the egr valve didn't fix it this time. I really hope I've given good information so someone can help me. Any advice would be appreciated.

While at it maybe I should check fuel pump psi. How do I do that on this model??

Thanks in advance!!