Can I pay for Diagnosis for my Misfires?

[ps2cho]

Hi guys,

It has been such a long time and I am honestly getting so sick of my 1988 Mercedes 300TE Misfiring constantly.

Me and my dad have gone through so many things trying to figure this out (he doesn't have a lot of time free to do everything...)

and I just feel this will never be figured out. Fixing it is NO problem! We can do it all..we just can't figure out what the heck the problem is that is causing the misfire!

We have done so far:
* OVP
* Voltage Regulator
* Injector's+Seals (previous owner)
* New Fuses
* Non-Resistor OEM Bosch H9DCO's
* New Bosch Ignition Wires
* Distributor+Cap (previous owners)
* Valve Stem Seals
* Breather Hoses
* I checked for leaky pipes/cracked pipes
* Compression is perfect (1/ 180, 2/ 180, 3/ 185. 4/ 185, 5/ 195, 6/ 190)

Can I just take the car somewhere and have it diagnosed? Do mechanics do this for relatively cheap for like a couple hundred dollars?

I'm on the edge of just buying a new car...but I really don't want to do that. It's embarrassing having other people in the car with me and I avoid it at all costs because the damn thing shakes so much. I've lived with it for 18 months now and I'm drawing the line soon...

Thanks, ps2cho