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1993 Ranger 2.3 5sp 2wd

  • Bear76
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02 Jul 2019 21:24 #31339 by Bear76
1993 Ranger 2.3 5sp 2wd was created by Bear76
My ranger is having issues. After running for about 15-30 minutes, it starts to hesitate and stumble under load at about 3k rpm. It progressively gets worse until it’s useless at any rpm under load. If I put it in neutral it will idle ok. I’ve been able to limp home and the next day it will start and run strong for about 15-30 minutes and it all goes downhill again. I have no codes and the check engine light doesn’t come on. I’ve checked all grounds, tested all sensors, and fuel pressure. I’m stumped. Any ides? Thanks

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02 Jul 2019 21:34 #31340 by Cheryl
Replied by Cheryl on topic 1993 Ranger 2.3 5sp 2wd
Check for a restricted converter?

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02 Jul 2019 22:41 #31341 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
I did. I found that the insides shattered. I replaced it but no change. I even ran without one for a bit while waiting for a replacement, no change.

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03 Jul 2019 01:11 #31345 by Andy.MacFadyen
Replied by Andy.MacFadyen on topic 1993 Ranger 2.3 5sp 2wd
Is the issue worse on hot days ?

" Welcome to the 21st"


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03 Jul 2019 06:42 #31352 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
I don’t think external air temp is making it worse but it’s summer right now.

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03 Jul 2019 09:28 #31357 by jreardon
Replied by jreardon on topic 1993 Ranger 2.3 5sp 2wd
Try unplugging the spout connector. When you do this you'll lost spark advance but see if it still stumbles.

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03 Jul 2019 11:19 #31358 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
I’ll try this today.

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03 Jul 2019 13:06 #31359 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
Ok, tried it. It didn’t change anything.

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03 Jul 2019 14:37 #31361 by jreardon
Replied by jreardon on topic 1993 Ranger 2.3 5sp 2wd
Could this be EGR? Make sure you don't have vacuum to your EGR when it's acting up.

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03 Jul 2019 14:56 #31362 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
I’m going down this road too. How do I check the egr vac while driving? It only happens while under load, it will rev fine once out of gear. I had it on stands and put it in gear and it’s fine

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03 Jul 2019 15:35 #31364 by jreardon
Replied by jreardon on topic 1993 Ranger 2.3 5sp 2wd
Just leave the vacuum hose to EGR unplugged and pinched so the EGR valve will stay shut when computer wants to open it.

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05 Jul 2019 11:30 #31416 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
Ok, did this and no change. I’m going to pull the bed and check the fuel pump. The pressure checks fine but I haven’t tried when it’s hot. I’ll check the grounds volts and pressure hot.

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05 Jul 2019 11:36 #31418 by Cheryl
Replied by Cheryl on topic 1993 Ranger 2.3 5sp 2wd
When you said you ran it without a converter you mean the converter removed? Or everything from the converter removed including the converter? Is it possible a chunk of the old converter went downstream and is causing a restriction?? I’d still suggest having a back pressure tester hooked up and drive it til it messes up and see if the gauge registers anything.

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05 Jul 2019 11:56 #31419 by Cheryl
Replied by Cheryl on topic 1993 Ranger 2.3 5sp 2wd
And monitor fuel pressure at the same time. No need to pull the bed off

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05 Jul 2019 13:19 #31420 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
I completely removed the converter and put in a test pipe. I fished out all of the matrix that made it downstream. I have since installed a new CC. Still the same issues. I’d rather remove the bed than work on my back plus I can run test leads from the fuel pump into the cab and test the voltage real time when it starts bogging down.

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05 Jul 2019 13:34 #31422 by Cheryl
Replied by Cheryl on topic 1993 Ranger 2.3 5sp 2wd
Good idea about voltage checking. Not to sound stupid or anything you sure the brakes aren’t sticking? It’s hard to diagnose when not actually there. Does that year not have a schrader valve on the fuel rail?? Do you have an off 1 scanner? If not maybe run jumper leads from the o2 sensor and monitor voltage. Again no offense we are not there to actually see what’s happening

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05 Jul 2019 14:15 #31424 by Bear76
Replied by Bear76 on topic 1993 Ranger 2.3 5sp 2wd
It has an OBD1 ecu. I have a reader but it doesn’t show any codes. I’ve tested the o2 sensor and it checked out fine. The brakes don’t seem to be locking, I’ve had to push it out of the road a couple of times. Yes there is a schrader valve and the pressure is good but I haven’t set up a rig to test it while I’m driving.

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