Tundra idles fine, but won't rev up.

There is not, unfortunately.

 

Update,

I replaced the crank position sensor and now it’s idling great and even allows me to rev it up to 1100 rpms but the problem still persists.

Could a weak ground to the ecu cause this? Where the new sensor is working better and able to send a stronger signal per se?

I won’t be able to swap throttle bodies just given the complexity of it and he needs his truck.

updated post crank shaft position sensor replacement.

https://youtu.be/JBLhziuGbMg?si=JX7teL07JVe58HSD

 

Another update:

After letting it idle a while I am getting codes p1300, 1325 1330.

 

Those are ignition codes iirc. Maybe the harness has issues to the coils.

 

Well I swapped those coils again to known good coils and it ran the same.

Then I tried unplugging those came cylinders and it ran considerably worse, so they seem to be sparking.

 

Did you check the codes to see if they followed?

 

All that soot by the tailpipe would indicate a rich running condition. Unburnt fuel. I would seriously check the MAF and O2 sensors. That earlier thread I posted about those codes lead to O2 sensor being the problem.

 

If the harness is bad, then it wouldn't change.

 

Found this in my searches "If DTCs P1300, P1315, P1325 and P1330 are output simultaneously, IGF1 circuit may be open or short"

 

Also:

P1300 Igniter Circuit Malfunction No. 1
P1305 Igniter Circuit Malfunction No. 2 (1998-2000 Land Cruiser, 2000 Celica & Tundra)
P1310 Igniter Circuit Malfunction No. 2 (Except 1998-2000 Land Cruiser, 2000 Celica &Tundra)/ Igniter Circuit Malfunction No. 3 (1998-2000 Land Cruiser, 2000 Celica & Tundra)
P1315 Igniter Circuit Malfunction No. 4 (1998-2000 Land Cruiser, 2000 Celica & Tundra)
P1320 Igniter Circuit Malfunction No. 5 (1998-2000 Land Cruiser & 2000 Tundra)
P1325 Igniter Circuit Malfunction No. 6 (1998-2000 Land Cruiser & 2000 Tundra)
P1330 Igniter Circuit Malfunction No. 7 (1998-2000 Land Cruiser & 2000 Tundra)
P1335 No CKP Sensor Signal Engine Running
P1340 Igniter Circuit Malfunction No. 8 (1998-2000 Land Cruiser & 2000 Tundra)

 

Hmm interesting. I found those codes only get set when I am pressing on the accelerator and not at idle. Could my fuel pump be creating low pressure at causing those to trip codes/ dysfunction at higher rpm when it’s not getting enough fuel?

 

These are all coil pack codes, not fuel related codes.

 

Your codes are for cylinders 1, 6 and 7.

 

Thanks! I had already found that online and tried swapping cylinders 1, 6 & 7 with good ones off a different tundra already. The codes persisted, but only when I am throttling up. That’s what was making me continue to wonder if it’s fuel related.

 

Another update. I ran additional power and ground to the respective + and - of cylinders 1,6 and 7 with no change. So I think I am left with problem being in the control wires in between the ecu and the injectors or the actual ecu?

Update #2:

This morning I am getting

 

Based on what you have posted, I would agree with this. Have you dove into the EWD and traced all of the ignition wiring back to the ECU? Based on the description of the random wire attached to the coil wiring, I bet you will find some hacked part of the harness somewhere. You can find a copy of the EWD's here: https://www.tundras.com/threads/ultimate-tundra-wiring-diagrams-collection.81448/

Although I am convinced this is an ignition problem, what happens if you open the throttle all the way? The way these throttle bodies work with a throttle cable is kind of strange. The throttle cable at the throttle body operates the APPS (accelerator position sensor). This in turn tells the electronic throttle motor to open the throttle plate which is what the throttle position sensor reports. However, in the last 80-100% of travel, there is a mechanical linkage inside the APPS that will physically open the throttle plate a about 20%.

It sounds like you have an OBD scanner capable of displaying real-time data. What is the MAF/Air temp, coolant temperature and throttle position reporting?