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Losing Throttle

I am experiencing a loss of throttle. It dose not happen every day, but really erratic and no check engine light. Always right after it sits over night. It will

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Old 01-16-2019, 04:21 PM   #1 (permalink)
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Default Losing Throttle

I am experiencing a loss of throttle. It dose not happen every day, but really erratic and no check engine light. Always right after it sits over night. It will come back, but slowly and shortly after it goes away. We have had it to the Dealer twice and now when we call them, we feel that we are wasting their time. I would hate to take the car back to them with the tail end all smashed from being hit! Anyone have any ideas?
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Old 01-16-2019, 04:27 PM   #2 (permalink)
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First thing to do is see if there are any DTCs. You can buy a code reader as cheap as $15 or rent one from an auto parts store.

If there are any DTCs, post them here.

If no DTCs, I'd try cleaning the MAFs - it's an easy job and only costs a can of cleaner. If that doesn't work, I'd clean the TBs.
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Old 01-17-2019, 02:23 AM   #3 (permalink)
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Welcome to the 370Z forums. Definitely see if you can read any codes first and check back here if there are any codes. It is very possible your MAF’s or throttle bodies are dirty and need to be cleaned. Also clogged up/dirty fuel injectors can cause loss of power as well.
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Old 01-17-2019, 03:07 AM   #4 (permalink)
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You can always try a bottle of Chevron fuel injector cleaner or Chevron fuel system cleaner it always worked well for me. Also you can hand clean your fuel injectors.
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Old 01-18-2019, 03:40 PM   #5 (permalink)
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Welcome , have fun with the roadster.
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Old 09-25-2020, 11:42 PM   #6 (permalink)
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Did you ever fix that issue
I have a similar issue, every time I start it from sitting overnight
I get a loss of throttle . It doesnít last long and within less than a minute
Itís normal but Iím not sure what it is. There are no
Codes and techs canít find an issue.
Clean out the maf and check everything
Strange
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