As an update to the hesitation issues with my car, 5 of my injectors have a poor spray pattern. These were brand new in spring of 2001 when I rusted my original ones. I'm going to have them professionally cleaned with the bosch tool or whatever it is (my uncle has the thing) next friday. My car also seemed to be running perfectly when analyzed. It had .02 CO emmitions, 0 of the P emmitions (I honestly dont remember what that one is called, I just know there is a P in it). Thats also without a CAT. The timing was dead on. One thing I'm still noticing is my frequency valve is usually pretty quiet under normal idle. But every now and then, seemingly out of nowhere, it buzzes as loud as it can and the idle goes bazerk. What I'm assuming is happening is the car is running lean via the frequency valve (but not too lean), then fully richens it up just at random. There is no envoronmental change. I dont know why it would suddenly enrich the mixture to that extent. I'm almost suspecting it could be a bad LAMBDA computer causing that. Thoughts? (remember, new plugs, wires, cap/rotor, fuel filter, O2 sensor). When my fuel injectors get cleaned, I will once again (3rd time since owning my car) completely pull the intake manifold with intention of replacing every single o-ring on top of this engine. The o-ring for the fuel distributor and the gasket for the air meter housing will be replaced as well. Since I'll be pulling all of this off, is there anything else people can suggest I check/change while I'm at it? (Water pump was done in 2001). Thanks. Jim Reeve MNDMC - Minnesota DeLorean Club DMC-6960