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  1. R

    1fz-fe 80 series

    hmmm, if it runs perfect on LPG and then on petrol has the pop pop issue could be a valve issue. The way LPG combusts can hide issues with valves in that it runs perfectly smooth on lpg but not so on petrol Id be having a really good look for vacuum leaks as well. is it injected LPG or...
  2. R

    1fz-fe 80 series

    is the pop pop pop in the exhaust at idle and felt like a pulse when you put your hand near the tailpipe? An incorrectly adjusted exhaust valve or burnt exhaust valve can exhibit similar symptoms as well as unmetered air between the MAF & throttle body. with #5 plug try swapping another lead...
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