[redneckdan]

My wife's '86 toyota is miss firing at driving speeds. Usually happens when the engine is under load and the throttle is past 1/3 open. I'll be driving along, go from 1st to 2nd and start climbing a hill, the engine will start miss firing and keep doing so until I let off the gas and gently ease back onto the accelerator a little, if I push farther down on the accelerator (ie 1/2 throttle) it will start missing again. any ideas? I know more about early model fords than toyotas. thanks for the help.

 

[390FE]

Carb or EFI

if carb I would say it's possibly choking out. My plow truck does it untill it worms up.
Maybe a rebuild is in order.

If its EFI I have no clue. That technology is to new.:lol:

 

[toyota_man82]

probably the timing advance. Todays gas is crap so the more your vehicle accelerates the timing advances too. If the springs on the weights in the dist are worn you wont get as much advance as you need.

 

[jlangdon]

if it's EFI it could be something silly like a TPS. My truck does sort of similar thing if you are running with a small amount of throttle and then ease off of it, it start bucking a little. i think it's that the thing is worn out and it gets confused between idle and thorttled running. it goes away if i let off and ease back on to the same spot.

Just a thought.

 

[Sidney]

Check your spark plugs,if bad replace with OEM Denso or NGK available aftermarket as well.

Sidney® ™
Repairs TV's,VCR's,home/car audio out of my apartment
E-mail:sidneybek(at)yahoo.com
Dartmouth,Nova Scotia
Canada