I am getting a code 5 on pin 8 which according to my chart of codes is a CTP switch. I have a 300 E 2.8 104 motor. Where is the CTP located? My car cuts out, stalls and surges at speed. The car basically runs well if I unplug the MAF air sensor. Then I also get a code 4 on pin 8. Are these related, or should I replace the CTP switch first.

Thanks,

Bill

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87 560 SL
93 300E 2.8
91 300CE-24