HELP ! O2 sensor problem?


Braindead

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They say it can't be done, so I did it. Again
My 97 4.0 2WD Ranger munched the five speed manual so I bought a five speed from a 2002 Ranger and hoping the heavier trans would last longer.
Had issues getting the clutch master bled. Finally got it done with a large syringe and surgical tubing. Now the truck stumbles BAD and I cannot get past 20 mph on level ground. It runs just fine until it gets to around 20 mph then just cuts power off and on again. The speedometer is not working and I found one upstream O2 sensor unplugged with nothing to plug it into.
It has about 360,000 km (225,000 miles) but looks, runs (ran), and drives like it is nearly new. I bought it a year ago and can only surmise that it was either insanely maintained or has a dash panel from a higher mileage truck (not likely).
Checked all the usual things and other than some soft plug wires on one side, everything seems good.
30005
 


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RonD

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Feel around the bell housing/engine mating, not uncommon for upstream O2 sensor wires to end up inside the bell housing and shorted out :) when installing transmissions

Check Fuse #3(15amp) in engine fuse box, its the O2 sensor heater fuse, if blown then for sure a short in one of the O2 sensor wires


Reads like dirty fuel filter or low fuel pressure, for why it stumbles when fuel demand goes up
O2 sensor is not the cause of this

The 2002 5 speed doesn't have the correct Speed sensor(VSS), it uses OSS instead, this is why speedometer doesn't work
You will need to get a speedometer interface to convert speed signal for use with speedometer, computer and Cruise
Like the SGI-5E, $85, seen here: http://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=126/prd126.htm

Ford speedometer needs 8,000ppm(pulse per miles), rear axle ABS sensor runs about 20,000-30,000ppm, OSS 15,000ppm, you can use either as the IN signal for an interface, then calibrate it for 8,000ppm OUT
You can use the old VSS wires near old transmissions speedo connection for the OUT, these wires are connected to speedo, computer and cruise already
You can use the rear axle ABS sensor for the IN, or the OSS on the 2002 trans
 
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Braindead

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84, 85, 94, 97
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Rangers
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8"electric, 2.3, 4.0-OHV, 4.0-OHV
My credo
They say it can't be done, so I did it. Again
Fuel filter is on the short list of possible causes. All this complexity for seemingly no good reason is getting frustrating, and I know a lot of it is probably out of necessity, but I am a self-unemployed disabled single parent with a very tight budget and I am getting tired with Ford's engineering antics. Change for progress is one thing. It is generally good, but change for the sake of change is not progress. A couple of examples off the top of my head; the F150 wheel bolt pattern until 1996 was a pattern used by Ford since around 1920, and they changed to an oddball size used nowhere else I am aware of, or to SEVEN bolt wheels ! Or my Lincoln Mark 8's, another oddball bolt pattern. A more frustrating endeavor was when they did mock ups of heads for the Windsor based engines to use the modular engine's valvetrain to see how many would step up to say they would be interested in buying them, they didn't tell anyone ! I could go on for hours, but I am sure everyone here has similar issues with Ford parts and pieces.
Sorry about venting here. Rather inappropriate, really.
But there is an upside ! I finally have my first real "performance" Ford engine since the 427 low riser I bought back in the early 80s, I bought a Barra ! Probably going into the Ford Sierra (Merkur XR4Ti) body shell I have sitting around.
30011
 

adsm08

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Most of the oddball wheel patterns Ford has used were the result of a half-hearted attempt at changing everything over to being metric. The seven bolt F-150 wheels were for the 7700 package only, which had HD axles.

But yes, Ford's design department generally needs a good kick in the head.
 

stsalvage

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i have 2 ranger
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I be checking your Fuel Injectors Or check the Fuel relay under your fuse box check fuel pressure But check your injectors you might have a few that are DEAD fuel injectors don't last forever 200,000
 


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