Put a scan tool on it yesterday and found that the injector pressure at idle is running around 660 but is only raising to around 750 by 2000 rpm. Put a new
icp sensor in this morning and tried it again. On start up they were at 850 or so at idle but eratic when raising rpm up to 1500. Saw readings as high as 1200 with noticeable unevenness. As it warmed up slightly the pressure at idle dropped down to about 670 at idle and just under 900 at 2000 rpm. I guess the next thing will be to replace the solenoid. I figure by the time I get to $2500 in parts I'll replace the radiator cap and it will work fine.