I'm working on a problem with my 1991 3FE FJ80. It has started having problems accelerating and going up hills. I'd describe the problem as:
-press on the accelerator
-tachometer goes up to about 2800 rpms
-needle on the tac starts to waver at about 2800-2900 rpms
-engine at the same time starts to shudder
-tach starts to jump all over the place from about 2400 to 2900 rpms
-vehicle starts bucking and trying to accelerate. Like, trying really hard to accelerate but just bouncing between 2400 and 2900 rpms.
-acceleration eventually sorts itself out after taking foot off the accelerator and slowly accelerating up to speed
Idle is pretty good, it's about 650 rpms so it's where I want it.
I'm going down the troubleshooting list in the FSM. PCV valve, grommet and hose need to be done, and it's been ordered. But I don't think that explains this behaviour.
I have:
-run injector cleaner
-checked all air and vacuum hoses for leaks, put a bunch of new hose down
-replaced the fuel pump as well, and after replacing it the system was back to normal, but then I realized the system is always good for about the first 20 minutes of highway driving- accelerates and climbs hills well. Then after around 20 minutes of driving if I try to accelerate it'll just bog down and be unable to accelerate properly.
Any ideas? I'm thinking it's a fuel problem, but what's weird is that there doesn't seem to be a fuel problem for those first 20 minutes on the highway.
-press on the accelerator
-tachometer goes up to about 2800 rpms
-needle on the tac starts to waver at about 2800-2900 rpms
-engine at the same time starts to shudder
-tach starts to jump all over the place from about 2400 to 2900 rpms
-vehicle starts bucking and trying to accelerate. Like, trying really hard to accelerate but just bouncing between 2400 and 2900 rpms.
-acceleration eventually sorts itself out after taking foot off the accelerator and slowly accelerating up to speed
Idle is pretty good, it's about 650 rpms so it's where I want it.
I'm going down the troubleshooting list in the FSM. PCV valve, grommet and hose need to be done, and it's been ordered. But I don't think that explains this behaviour.
I have:
-run injector cleaner
-checked all air and vacuum hoses for leaks, put a bunch of new hose down
-replaced the fuel pump as well, and after replacing it the system was back to normal, but then I realized the system is always good for about the first 20 minutes of highway driving- accelerates and climbs hills well. Then after around 20 minutes of driving if I try to accelerate it'll just bog down and be unable to accelerate properly.
Any ideas? I'm thinking it's a fuel problem, but what's weird is that there doesn't seem to be a fuel problem for those first 20 minutes on the highway.