240 overheated, now idles BAD..

[dundfaukus]

My brother drove his 93 240 while it was heating up for a good while on the highway, finally when he exited the car just shut off by itself. I looked at it and it had 2 problems, almost no oil and no coolant.

I swapped the plugs, wires, water pump(which was bad), and thermostat. Fired up the car and it idles horrible...of course I put in oil too.

It drives but the engine vibrates and clanks. I did a compression check and got 120 150 150 100 (cyl 1 2 3 4).

I let the car run for a while and did not notice any overheating or smoke(white/blue) coming out the echaust. Even if the HG was blown, I doubt it would run so horribly(my old eclipse HG was shot and the car still ran fine aside the overheating). I also checked to see if plugs/wires were okay and in correct order.

Anyone have any advice on what I should be looking at to fix the rough idle problem, I want to look in every possibility before changing the HG or swapping engines...

Thanks.

[Chukidori]

Itmay not be it but try replacing the coolant temp sensor while ur at it ...I hear excessive overheating damages them quickly , as a result it will think its runing hot all the time and retard timing and dump a **** load of fuel to try to save itself...

[dundfaukus]

If it was the temp sensor, I should be throwing a CEL right?

There is no CEL and no codes when I checked.