Question about Subaru Forester

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I have two problems. One, the accelerator worked poorly which I helped with a Blitz trottle controller. And two, the automatic gear down fails to kick down when you press the accelerator all the way to the floor. This results in the car having little acceleration. Its dangerous.

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Hi! Have you tried replacing the torque converter of the transmission? This controls the high and low shifting of the vehicle. This may help you out. Have a good one and thank you for using FixYa!

Posted on Nov 03, 2010

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Posted on Jan 02, 2017

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Where is the passing gear on a 2003 Mitsubishi Diamante


'Passing gear' is a term that means the transmission is down-shifted to a lower gear (e.g., from 5th gear to 4th gear) for improved acceleration to pass another vehicle. There is no physical component called a passing gear in the transmission.
To engage the 'passing gear' with an automatic transmission should require nothing more than pressing the accelerator pedal down firmly. The transmission should downshift automatically to the next lower gear (sometimes it will downshift two gear ratios, depending on your speed and how far you depress the accelerator pedal).

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My Pontiac grand prix se has no power


Where to start,
- Check exhaust
-- Blueish smoke, Could be Fried Cylendar Rings, Verify With Compression test - Also check if the oil level is going down
-- White Smoke, Could be spark plugs, wires, or coil pack
--- Check oil for a white or brownish foam, if so head or intake gasket.

- if 3.4L, intake gaskets are a common issue, sometimes you can hear it sucking if you accelerate from the throttle body. (Be carefull, moving parts!)

- See if vehicle is having a problem with climbing over a certain RPM, If so
-- Plugged Fuel Filter
-- Plug Catalytic Converter
-- Plugged Air Filter

- If automatic
-- See if transmission is kicking down a gear during harder acceleration.

Also note that a bad TPS (Throttle Position Censor) located on the throttle body can cause this as well. Often felt as very poor acceleration or studdering during acceleration.

Failing O2 censor can cause an issue like this as well, unhooking the censor completely will put the car in a failure default setting that will allow it to operate close to normal, but make sure you replace it if it has failed to avoid replacing Catalytic Converter as well.

Start there, but it could be many other things as well. If check engine light is on, get it read. or pick up a code reader and read it yourself.

Good Luck

Oct 12, 2014 | Cars & Trucks

1 Answer

I have a 1994 mitsubishi mirage ls 1.8 automatic and it accelerates poorely.. i foot it and it goes slow its like the pressure is not all there? and i have smoke comming out of my muffler its black bu


Hello

The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems.


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1 Answer

Very poor acceleration through all gears


diesel pump might not be working right. Try and check fuel pressure. I dont know if its turbo but if the turbo is failing then you will loose power

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No power when accelerating hard


Possibly a plugged catylitic converter. This can cause to much back pressure and that will cause the engine to run poorly under acceleration or loaded conditions.

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1992 Ford E350 7.3 Diesel Automatic Cube Van


I would look under the hood for a relay box and see if the relay needs to be replaced for the tail lights. As far as the acceleration i would try ramping up to passing speed the vehicle could have a governor limiting the top speed.

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check valve timing ?? someone changed cam belt??

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