Overdrive on a 1988 Toyota R22e pickup carrying a Winnebago not work above 4000

calvinleman · #1 Oct 19, 2006, 02:54 PM

The overdrive on a 1988 Toyota R22e pickup carrying a Winnebago does not work above 4000 feet altitude, according to the owners manual and my experience. How can I modify the pickup automatic transmission overdrive so that it works above 4000 feet altitude?

On long flat roads above 4000 feet, I have to keep speed 40-50 to not race the engine. Here the engine has plenty of power to run 60 mph without taxing either the engine or the transmission.

perk4916 · May 15, 2007, 05:54 AM

1988 4cyl toyota pickup 4x4 fuel pump fuses and or relays are located where

kitch428 · May 15, 2007, 06:26 PM

Perk, the fuel pump circuit opening relay is located behind the glove box. It should click everytime the key is turned to start.
The EFI fuse is on the pass fender in the engine compartment. (hint, if the CEL comes on with key on, fuse good)
Calvin, try a new O2 sensor, a new efi temp sensor, and new thermostat. If you get it to a dealer, the Toyota fuel injector cleaner is a great product. It will help richen thoses injectors up some. The 22RE likes to run lean due to emissions. That's why the stumble @ idle.



At Ask Me Help Desk you can ask questions in any topic and have them answered for free by our experts. To ask questions or participate in answering them you must register for a free account. By registering you will be able to: Get free answers from experts in any of our 300+ topics. Accept money for answers that you provide. Communicate privately with other members (PM). See fewer ads. Sign Up!