Mitsubishi Repair Problems? Ask a Mechanic for Answers ASAP
This is typically normally a bad TPS sensor .(very common)
Did you check for malfunction codes ?
If no code relating to the TPS then you will need to check the TPS for glitches, you will need a good scan tool that has live data .
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Kind regards Greg.
You have a scan tool with live data, if yes what is the st trim reading at idle and then at 2500rpm
MAF reading at idle .
Sweap test the TPS for glitches, cleaning it will not do anything