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CEL on, automatic choke not holding, low idle after warm up, no 4th gear.

(1990 Ford Ranger)
in Knoxville, TN on March 31, 2018
Automatic choke kicks out after starting (when cold), won't stay on. It also won't shift into 4th gear & idles low.
TPS is ok.
What seems to make the problem better or worse? N/A
How long have you had this problem? Month
Tags: check engine light on, ford, ranger, 2.9 v6, automatic
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Displaying 2 answers & 3 comments
Popular Answer
on March 31, 2018
Highly recommend hands-on testing by qualified personnel.

(Automatic choke?)
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on March 31, 2018
That's the best way I can explain it. On cold starts when normal, the idle is higher like an auto choke. As the engine warms up, the idle gradually drops until it's where it's supposed to be @ operating temperature.

Now on cold starts the idle drops almost immediately then the CEL comes on.
on March 31, 2018
Hello -- did you select a 1990 Ranger and it's in fact an older one? As pushrod inferred, there's no automatic choke on a fuel injected 1990 Ranger with a 2.9L V6...nor would there be a TPS with a carburetor.

Random shot in the dark not knowing if your vehicle application is correct: Check your TV (throttle valve) cable that connects to the transmission and the throttle body. There is a grommet there that commonly splits and then causes shift point and throttle and transmission issues. If it is separated, you may be too late and transmission damage may have occurred. Again, shot in the dark -- and pushrod is right -- hands-on testing by qualified personnel is suggested! Good luck.

ALSO -- with a check engine light -- have this tested first! Clues are to be had here...
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on March 31, 2018
Hello, Thanks for replying.
I know there's no auto choke, I was just trying to describe how it's acting.

Where exactly is that grommet, & how can I test the CEL ?

Thanks !
on May 04, 2018
Hello, I solved the problem after I posted this.
The Coolant Temp.Sensor connector worked its way loose off the sensor due to broken connector locking tabs. WHAT A RELIEF !!!
I replaced the connector.
So now the CEL is off, idle is back to norm & it shifts into 4th just fine.

Afterwards, I thought I'd check the grommet (I think you're talking about)
on the TV cable & it seems OK.

Please respond. Thanks !
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