Engine cuts out at full throttle
 

hey i have a 1996 4runner with the 3.4 5VZFE and the 5spd manual trans. the car has been cutting out at full throttle, but if i ease of the gas a little i can redline the motor if i want(not that i do). when i give it full throttle the car will actually cut the rpms down to 3500 and acts as if its being governed AND I CAN ALSO SMELL FUEL WHEN THIS HAPPENS.the car has 550,000 miles on it, but this motor only has about 180,000 if that. any help is appreciated. :chair:

So, don't stomp on it or redline it and the problem is solved, right?

i don t stomp on it haha if you gradually increse to full throttle the same thing happens, and i cant redline the motor currently either....thats the problem. SO, yes i guess that would solve it, but i want to fix it fully. BUT technically no, it doesnt solve anything.

What have you done to troubleshoot the issue?
What is the recent maintenace history?
Is there a vacuum leak in the intake tube or any other vacuum line?
When was the MAF last cleaned?
Last timing belt change?
Air filter clean?

You could have a bad and/or partially plugged injector that holds the engine back when you are calling for lots of power.

oh boy where do i start haha, to try and trouble shoot i replaced the plugs and wires, fuel filter, cat w/ 02 sensor, i even replaced the mass air flow, TP sensor, ECT Sensor, and the fuel pump was done about 2 years ago. i have NOT done a timing belt yet, air filter was recently changed, and how can i test the injectors?

I would do a seafoam treatment, more just because it can't hurt then I think it will actually fix it.

Now load up the gas tank with injector cleaner, that could do some good for the issue at hand.

Do you have any CEL's?

A video of the problem would help.

i have run seafaom through the pcv valve already,and it made a differenece in power, but the problem still persisits. i will try seafoam as an injector cleaner too, but No CEL, and i will post a vid of it soon. Thanks