gm4runner

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.

rworegon

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

gm4runner

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.

rworegon

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.

gm4runner

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?

Texas_Ace

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.

gm4runner

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