On Wed, 24 Jan 2007, Werner Fehlauer wrote: > John - I would look at the obvious things first, like injectors. I had all > of mine in the SD taken out, checked for spray pattern and calibrated. My > indy did me a "favor" by replacing one that had a leak, and that made the > engine idle pretty rough, hence the calibration. Runs a lot better now. > I'm thinking that injectors working at different pressures, and with perhaps > something in the lines causing a bit of flow restriction would give those > symptoms. You could start by just cracking the lines at the injector while > idling, to see if that changes the smoothness. You haven't changed filters > lately in that car, have you? > Of course, with that much newer engine than my 617, I suppose that there > could be some exotic stuff going on.... > Werner
The filters are pretty recent. I ran Hi-test through them (1/4 tank, add hi-test, run 200mi, add fuel, run it down to 1/4 tank) I guess I will see about injectors. What is pricing like for rebuilt ones (so I can take them to have them calibrated)? The reason I suspected EGR is that the gasses could cause combustion issues, and a sticking EGR or otherwise leaky EGR valve would allow air to escape under pressure... atfer the MAF has measured how much air was going into the engine, which the computer uses to determine the fuel injection quantity (and therefore rack position). I do get some smoke on acceleration (which is smooth and strong). -j.
