Hey guys, been awhile since I’ve posted. Recently I acquired a 91 DLX Pickup 22re 5speed and the thing has been running great for the most part up until last weak. I noticed that once its been running for a little while the thing just will not go! At idle and below like 2000 rpms (I don’t have the tach so I’m guessing on the rpms) it runs and revs perfectly fine, then when it passes that magic number is just stops. Its not a misfire. It sounds the same as when it hits the rev limiter but at 2500rpms.



So my guess is that for whatever reason the engine is shutting off the fuel or spark when it hits those conditions. Someone suggested to me this morning that maybe its the temp sensor that runs to the computer because it runs perfectly fine when it first starts up until it reaches operating temperature. Anyone have any thoughts on whether or not this is true? Need to get this fixed asap as its my only set of wheels in the snow

 

We could use some more information, like what speed and which gear.
Is this in first gear or is it when you are doing 50 on the highway in 5th gear?
Is it in every gear at that RPM? what happens if you downshift to a lower gear? does it take off like a scalded dog or bog down?
2500 RPM with a 22re isn't going to give you much acceleration EVER, they just don't have much power.
If you downshift and it still falls on it's face the things you should look at (not necessarily in order) are:
fuel supply/delivery (filter or injectors clogged, pump not supplying enough flow/pressure)
exhaust restriction (clogged catalytic converter)
weak spark or needs a tune up.
timing
compression
air intake restriction (clogged filter)
airflow sensor
throttle position sensor
brakes dragging

I am sure there are other possibilities I am missing, but this will eliminate a lot.

 

Its all gears. And I know what a normal 22re is supposed to feel like. I’m talking this thing literally has no go. Its cutting off fuel or spark and not revving higher. This is also only an issue once its warmed up, at start up and for the first 10-15 minutes of driving its totally fine. After that it just cuts out after a certain rpm, no matter the gear or speed. So that eliminates most of what you said. Down shifting gives varied results. Sometimes it just keeps the fuel cut, other times it bucks the truck because its missing hard like its hitting a rev limiter. Its definitely not a normal misfire though. This is something the computer is cutting off. Just not sure why or how to diagnose it

 

I have seen issues similar to yours on other brands that were caused by weak spark.
I have also seen similar issues caused by poor connections or grounds.
I have also seen similar issues caused by low voltage output from the alternator, even though the charge light did not illuminate.
There are still some items on the list I made that you should check regardless as they may be contributing factors.
Similar to going to a doctor for a sprained ankle, they still check your blood pressure and pulse.
Since this truck is a recent acquisition you should check the spark plugs, cap/rotor, air filter, timing, compression to see what you have to work with.
Since it's a 91 and you live in Cali I would guess that it has a ton of miles on it, so what would it hurt to change the fuel filter? Dump it out into a clear container and look for water or black crud from a failing fuel pump.
You mentioned temperature sensors in you first post, if you think that might be the issue get out a meter and a service manual and see if it is in spec. if you don't have a manual (I don't either) you could at least see if the resistance changes with temperature in a fairly linear manner.

 

Good advice. I think you hit the nail on the head with checking the grounds (specifically the fueling system). The other really great part is the fuel filter advice. Check it. My guess is the fuel tank is full of rust.

22re's don't have "limp mode" OBD1 fuel injection it's not that complicated.

 

Did you find the fix “theking11863”?

thanks
Ralph2

 

you now have as many posts on the forum as "theking". since "theking" only posted 4 times in 5 years, you might be out of luck in getting an answer.

 

start a new thread so someone can help you on your specific problem