I hope that no one minds me asking so many questions in this group. I
seem to trust you guys a little bit more. Those that I ask out here
don't give me too many answers and I'm often told, "Well if you had an
American car..." *LOL* BUT ANYWAY...
I have a '90 Celica ST. I understand that the ST isn't exactly the
fastest vehicle but I was wondering if there was anything I could do to
boost the acceleration a little bit. Would fuel injector cleaners help?
I heard that these sometimes shouldn't be used because if there was
some sort of grime sealing a leak somewhere on the vehicle, the cleaner
would clean the grime and cause the leak to come back. Any truth in
What other options do I have?
Throttle body cleaning will not make the car accelerate faster.
If the throttle pedal is difficult to depress from idle, then the throttle
body may need cleaning.
I do not know the average price for this service, but it is very simple to
do yourself if you can identify the throttle body, can depress the nozzle on
an aerosol can, can wipe up a mess, and know "lefty-loosey, righty-tighty."
Remove the plastic tube leading to the throttle body, spray the inside of
the throttle plate-butterfly valve with carb aerosol carb cleaner, wipe out
the mess from the inside of the throttle body. Then, rotate the bell crank
on the side of the throttle body to pen the throttle plate and spray the
other side of the plate and wipe out. Pay attention to where the edges of
the plate touch the inside of the TB to make sure all the gummy residue is
The engine will smoke badly after you do this service but should clear up
There are many things that affect a vehicle's acceleration.
Assuming that there are no obvious performance issues like hesitation,
knocking, pinging, etc., here are some tings to check:
Make sure the brakes are not dragging.
Make sure the wheel bearings are in good shape.
Make sure the tires are properly inflated. I recommend mfr's recommended
inflation + 4 or 5 PSI.
Make sure the vehicle is properly aligned.
Make sure there is no excess weight in the vehicle
Stuff like spoilers, etc. tend to slow down a vehicle without a lot of
Make sure the AC compressor disengages under WOT conditions
Use OEM ignition parts
Use the proper weight motor oil
Make sure the accessory drive belts are not too tight or loose
Make sure the transmission and differential fluid are in good condition and
the proper weight
Make sure the transmission and/or clutch are not slipping
Make sure the vehicle passes emissions tests
Make sure the air filter is not clogged
Make sure there are not restrictions in the exhaust - you can try a fuel
injector cleaner like Chevron Techron or the Toyota branded stuff that
Toyota dealers sell, or Motor Vac.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.