Been having this problem for a while now, thought I fixed it when I replaced my leaky injectors with new ones, but it started happening again a couple days ago. My fuel pump has been whining on me, so I'll be looking to replace that soon as well.

Once the fuel pump is replaced, will the hesitation go away? I have a friend of mine with an 86 SVO (2.3 turbo) that has had this issue for some time now and has not been able to figure it out.

Also, I switched to an electric fan setup and tossed my clutch fan. Ever since, my car doesn't like to stay cool at idle. I removed my fan shroud, not sure if that has anything to do with it. My water pump and thermostat are fine, fan kicks in like it should. I fire'd her up and popped the rad cap to see if any bubbles were coming out, and saw nothing.