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Discussion Starter · #41 ·
Rich_d- I didn't spray brake cleaner on the maf sensor. I sprayed it on any lines connected to the pcv and maf system..
 

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Discussion Starter · #42 ·
Also... Is ANYONE going to answer me about how IF the 02 sensors/cat were the problem, THEY'D THROW A CODE?!
 

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Also... Is ANYONE going to answer me about how IF the 02 sensors/cat were the problem, THEY'D THROW A CODE?!
not always. codes don't get thrown till they degrade to a certain point. i haven't re-read the entire thread so i don't know if this has been mentioned. the injectors could be mechanically leaking, which would cause horrid gas mileage and not throw a code. also i had a 2005 Matrix that would constantly throw the cat code and i replaced the rear o2 sensor hoping that would fix it, the cat was clear, and i find out that that car was intended for the canadian market which doesn't (at the time) have the ethanol blend and find out that the computer needed to be reprogrammed to account for the ethanol. my fix was putting an extension on the rear o2 mount moving the rear o2 sensor out of the direct path of the exhaust but still somewhat in the path. the code didn't trigger and mpg improved, but i don't recall how much it improved.
wish i had bookmarked the website i found the ethanol info at, sorry.
id see if you can find a way to have the injectors tested for leaking.

hope this helps
 

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マズダスピード3
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Also... Is ANYONE going to answer me about how IF the 02 sensors/cat were the problem, THEY'D THROW A CODE?!
To answer your question, you need to post data.

Fuel trims
MAF
O2 sensors

We're at this point shooting in the dark without the data. If you do have it, freeze frame data helps also.
 

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Discussion Starter · #45 ·
Good news, everybody! I set an appointment with an auto shop to tell me what my fuel trims are. And, provided they can get it done on Friday, I'll let ya know ASAP.
 

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Discussion Starter · #46 ·
And now, the moment you've all been waiting for... Fuel trims! For some reason, they did both open loop and closed loop.
-Open loop: STFT= -6.27 LTFT=4.65
-Closed loop: STFT=3.87 LTFT= 1.53
 

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I have no clue what that means. What did they tell you it meant?
 

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89SupraT 96T100
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It just takes FOREVER for it to shift (even with O/D on).
This comment here tells me to look into the transmission before anything else.
What transmission fluid did you use? What procedure (drain and fill or actual flush)? Did you find metal shavings at the bottom of the oil pan? What does the oil look like now?

If it keeps revving high before it switches gears then something is wrong in the transmission not in the engine.
 

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89SupraT 96T100
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Transmissions are very sensitive and must use the correct oil or you might end up using an oil that does not only have the wrong viscosity, it might erode/corrode/destroy parts inside or sensors.
 

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2003 Corolla S with 243k miles
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And now, the moment you've all been waiting for... Fuel trims! For some reason, they did both open loop and closed loop.
-Open loop: STFT= -6.27 LTFT=4.65
-Closed loop: STFT=3.87 LTFT= 1.53
This looks fine. No issue here.
 

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Discussion Starter · #52 ·
1989SupraT- (copied and pasted from comment #13) "John Anthony- No idea what fluid was actually used, but hopefully they used T-IV compatible fluid. Yes, it was a drain-pan drop-filter replacement-refill. I asked the shop I took it to- about a flush, and they didn't recommend doing a flush (because of possible damage- which I was 100% ok with). I COULD be wrong- but I don't think the trans filter is dirty, because the last time I checked the trans dipstick, it was still pretty pink. But I'll check it again". (copied and pasted from comment #32) "John Anthony- I checked the trans fluid a few days ago, and I'd guess it was still 60% pink".
 

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If you are hoping the shop used the correct fluid you already started wrong. Most shops do not use the recommended fluids for anything, they use what they can get cheaper or have on hand, unless you specifically ask for it and then they usually charge extra because of the extra expense.

I would do the drain and fill myself a couple of times still pretty cheap to do before I try anything else.
 
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