Rigged up a pressure gage at the upstream EGR
tube nipple. Based on an exhaust back pressure video I saw, I would say that I DO NOT have a clogged exhaust. No recordable pressure at idle and only slight (under 2 psi
) pressure showing at about 3000 rpm
So where does that put me?
Let's review where we came from:
1. Car exhibited extreme loss of power (worse after getting warm)
2. Blew off DPFE
hoses trying to drive it home
3. Confirmed only P0171 code (lean bank 1) suspect that was on for years
4. Replaced all cats and muffler
5. Replaced plugs and wires
6. Replaced fuel filter
Car still exhibits low power and potential miss. Will get a code reader to determine any new codes set or pending.
Things to do:
function tomorrow (borrowing a vacuum pump)
Verify no vacuum leaks at small EGR
Could this be a bad coil pack? How to tell?
Thanks in advance for the help....I think we are getting there Sherlock