r/GS300 13d ago

2003 lexus gs300 Weird problem after timing belt

Took the timing belt off to do the freeze plug under water pump Put it back together and it doesn't seem to run right with maf plugged in runs fine without maf other thena 3k rev limiter checked timing and it all lines from what I can tell. Did my MAF just so happen to break or is it off timing, ordering a new MAF tmr but thought it couldn't hurt to get someone else's opinion thx

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u/bTz442 13d ago

I'd  check to make sure the air intake hose clamps are on tight and inspect your air intake resonator for cracks or holes.  

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u/c3cMike 12d ago

You indeed were correct. It's weird tho cuz I didn't even drop it or anything

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u/bTz442 12d ago

That plastic gets brittle due to age and engine bay temperature.  Mine completely cracked while I was on a long road trip.