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Old 09-02-2020, 09:05 PM   #1
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Default Poor gas mileage

My vehicle is getting very poor gas mileage! I have an OBD reader so I did a live read on it and the maf sensor was reading very high so I took it off and cleaned it but now it's reading normal again and it's getting worse mpg I also replaced the map sensor! Anyone else have this issue and what was done to correct it?
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Old 06-26-2021, 01:29 PM   #2
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1996 SL2
Default Re: Poor gas mileage

Last statement That made no sense at all.
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Old 10-18-2021, 05:43 PM   #3
Dusty Trigger
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Default Re: Poor gas mileage

Clean your fuel injectors and whole gasoline system as it can be gummed up, etc. causing injectors to spray incorrect mist pattern and using too much fuel.

I have used Chevron Techron Concentrate Plus Whole Fuel System Cleaner as needed (Walmart $4.94/10 oz, etc.) to now use much less fuel at idle and improve acceleration.
Chevron originated the Nitrogen Based Fuel Cleaning Additive that must be used to be effective.

Last edited by Dusty Trigger; 10-18-2021 at 05:50 PM.
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Old 10-18-2021, 07:58 PM   #4
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Default Re: Poor gas mileage

Here is a detailed answer to this inquiry:

Feel free to read it when you have the time.
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Old 10-29-2021, 01:33 PM   #5
Doug C
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2008 Outlook XE
Idea Re: Poor gas mileage

Originally Posted by bordermec View Post
Last statement That made no sense at all.
It made sense !

A reading can start looking good after the MAF cleaning (and possibly a new air filter if due or dirty), but still have worsening mpg indicating the MAF was not the cause !!

ex. I recently acquired a '96 gmc sierra k1500 with minor issues, subsequently I uncovered after market add-ons within the air intake hosing, cleaned the MAF sensor with CRC' (as I read that contamination of the unit could cause the negative symptoms showing), and replaced hosing & the compromised manifold adapter to shed the add-ons a previous owner had installed presumably for better mpg, but the engine still 'stutters' when idling at a stop .

p.s. what Outlooks are you all driving ?

Last edited by Doug C; 10-29-2021 at 01:38 PM.
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