claytondudley

I have a 95 s320. Been sitting at a parts changer for 3 weeks and nothing positive from them yet. I had a multiple cylinder misfire. I repaired by new plugs,wires,coils. Ran good for two days. I changed out the fpr also cause it was bad. I drove the car in the am one morning 15 miles parked it went inside for 10 minutes and started it and it was reving up and down in all gears. I couldnt figure it out so took it to parts changer. We haved cleaned throttle body ,injectors, rewired a few bad spots we found (harness behind block) checked all the wires for burnouts from male and female plug on throttle assembly and harness. All check good from pins to plug. Checked fuses in trunk and under hood. Ecms show to be good also. Changed maf sensor and no change in idle. If i turn on defrost like putting load on engine it will idle down a small bit, but doesnt when turn ac on. If you give it throttle it sounds like its gonna die like choking out. We have also used throttle body cleaner to check for vaccum leaks. Check engine light is on. Any thoughts? Besides sell it. We have disconnected batteries and left driver door open to drain ecms. If you try to drive it it wont go over 10 mph without dieing.

Thanks for help in advance!!

oldsinner111

I'm afraid you need to remove throttle body and rewire it.It has bad wire in it also.

claytondudley

I have checked for vaccum leaks with throttle body cleaner a few times. Is the throttle body basic wiring?

oldsinner111

yes you can rewire throttle body yourself,buy high tempeture wire,and rewire.

claytondudley

Thats better than buying one.! This car has been in the shop ever since i bought it. Parts changer says its in limp mode and he cant get it out without buying a mercedes computer. He tells me it has asr and he cant reset comp cause it keeps going to limp mode. I kinda thought if it keeps going to limp mode that would definitely say theres still something wrong.

claytondudley

Ok I rewired the throttle body and I am still having the same problem!!

oldsinner111

My God that didn't help?Possibles Maf sensor,throttle position sensor,check transmission for leaks,in main harness.Your wiring harness is new right after 1997?

lindevista99

Have you check engine harness ?