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Discussion Starter · #1 ·
I just did an SR5 cluster upgrade and now that I have a tach I'm noticing the motor won't rev past 4300 RPM when floored. If I use a small amount of skinny pedal the motor will rev all the way up to 5700 RPM or so then hit the rev limiter. But, when I use half or full throttle the motor will flutter around 4300 RPM.

I may have some questionable vacuum lines but I am not sure if this could be a culprit because this problem is dependent on how much gas I use.

First thing that comes to mind was the TPS. So I pulled the throttle body and checked the TPS. It was out of adjustment so I moved it around till I got these results:

VTA-E2 (0.0mm) .70k Ohms
IDL-E2 (.57mm) .11k Ohms
IDL-E2 (.85mm) Infinity
VTA-E2 (OPEN) 4.55K Ohms
VCC-E2 (ANY) 5.83K Ohms

All parameters are good so I know the TPS is good. I also checked the AFM and came up with this:

E2-VS 450 Ohms
E2-VC 180 Ohms
E2-VB 280 Ohms
E2-THA 1.87k Ohms

I know the E2-VS is out of range by 50 ohms (should be 20-400) and according to the FSM, the AFM should be replaced. But with the AFM only being off by just that little amount, I am sceptical if this would by my problem.

btw: this motor is a 88 22re (4runner) with a fresh rebuild about 2500 miles ago. The motor has a 268 cam, Street RV head, LCE Header and is bored .030 over.

And I am getting a code for the water temp sensor and o2 sensor. I doubt these are related to my problem because as stated before, the motor will rev all the way if I use a light amount of gas.

So... Here's where you chime in

Premium Member
29,254 Posts
Could be related to the temp sensor. I cant remember for sure if the 22re ecm does it, but often there is essentially a warm up period where the ecm will protect the engine from overspeeding while cold, esssentially limiting it to a lower rpm range until it is fully warmed up.

For example the Auto 3vze's wont shift into O/D until warmed up, so it is possible that the temp sensor could be part of the issue.

It is always easier to fix what you know is wrong before you try to diag a mystery condition. Remove as many variables as possible, makes it easier on yourself.

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