Hello! Recently purchased a 300 Pro Max for a heck of a price and now I'm finding out why. The engine would not run over 5400 rpms so began to troubleshoot. The compression is 125-130 all cylinders. Fuel filters and pressure is fine. The TPS is acting unusual. With the throttle in neutral the TPS sensor shows 3.52 volts. At WOT the TPS reads .67 volts. I have read other threads suggesting the ecu may be bad but the ecu was obviously replaced because the DDT read a total of 8 hours on the unit. Attempting to adjust the TPS has been futile. The TPS does not have any dead spots and seems to be rather smooth when it is turned. Any suggestions? Thanks!
