I have a 97 ranger. I have the equus 3130 scanner. When I try to read the o2 voltage inlive data it shows 0. I cant do the o2 test either. I'm not sure if the truck doesn't support this function or the tool is defective. Can anyone read the o2 voltage & do a o2 test with on of the scanners actron or equus? Tech support wasn't much help. Thanks!
pawpaw:
What year is your ranger? I guess your scan tool shows live data too. When checking live data the o2's show zero. STFT's shows -100 & I think the LTFT's showed -100 too. I'll have to double check that. I don't have any o2 codes. The only code I have is the p1443. I know what it is just have to find the culprit, hose, valve etc. I think I let the o2 heat up long enough, how long should I waite? I'm going to try the scanner on another car. thanks!
The P1413 code is for the evap system, little or no purge condition. Maybe a vapor recovery vacuum hose leak at the intake manafold, or a pesky charcoal canister purge valve, which is fairly common.
A whif of Silicone, or Coolant can kill the O2 sensors. They are heated, so they'll come on line fairly quickly. They should be up & running in less than a minute, unless they're really lazy & ready for replacement. Most folks change them around 100K miles.
Not sure if you have some program problem with your scantool, or if you have some other problems with the Ranger, but the fuel trim isn't right either.
If the scantool will read ok on another vehicle, then at least you'll know it's ok!!!!
Yup the Actron CP9145 will read live PID data streams.
BTW welcome to FTE.
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99 Ranger 4dr 4x2 4.0L 5spd auto 3.55L/S Payload pkg2 tow pkg
Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)
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pawpaw:
What year is your ranger? I guess your scan tool shows live data too. When checking live data the o2's show zero. STFT's shows -100 & I think the LTFT's showed -100 too. I'll have to double check that. I don't have any o2 codes. The only code I have is the p1443. I know what it is just have to find the culprit, hose, valve etc. I think I let the o2 heat up long enough, how long should I waite? I'm going to try the scanner on another car. thanks!
You may not have O2 codes, but the fuel trim condemns either them or the MAF. Or you have a dead connection somewhere.
PAWPAW thanks for the welcome. I checked the scanner on a 06 suzuki car & it read the O2 in live date just fine. So I guess the scanner is working ok.
Bear River: Even without any O2 codes With the fuel trims showing -100 all the O2 could be bad? It has an O2 test, it didn't work either. The screen came up blank with an exit icon, didn't show any O2's. How can I check them? If It was a dead connection where in the heck would that be? Thanks.
When I spoke to tech support about it not showing the O2 readings in live data he suggested that maybe the truck didn't support that function. That doesn't sound right to me. I didn't mention the fuel trim so maybe he would have givin a different answer. Maybe I will call them back to see what he says.
Does this scantool automatically link to the vehicles computer, or do you have to first input the vehicles particulars???? If the latter, are you sure you put in the right info????
We need some historical background on the vehicle, as it's not likely that ALL of the O2 sensors or their electrical connections would suddenly go dead, unless something unusual happened.
Did this condition come about suddenly after some event????
So is this a flood vehicle????
Do you off road????
Did/do you have a coolant leak into the engine, like a blown/leaking head, or manaflold gasket????
Have you been spraying silicone under hood with the engine running???
How is it running now????
You could pull the O2 sensors electrical connections & inspect them for corrosion, bent or pushed back pins or sockets, or cut wires, or damaged insulation.
While you have their connectors apart you could also use a multimeter to measure the O2 sensors output, to see if they're switching wit the engine running. If they are'nt, then they are dead for some reason.
If they're switching, look to an electrical connecion problem between the O2 sensors connector & the computer.
You could then back probe the computers firewall electrical connector so see if the signal is making it that far.
If so, then suspect the computer.
A bunch more thoughts for pondering, let us know what you find.
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99 Ranger 4dr 4x2 4.0L 5spd auto 3.55L/S Payload pkg2 tow pkg
Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)
Our signature is a sign of a job completed autograph your work with excellence
Sent the first scanner back & received a another scanner today. It does the same thing as the first one. Since the first worked fine on the suzuki car, I don't think it's the scanner. It doesn't show o2 readings & the fuel trims are still -100 in live data. When I looked at the freeze frame data for p1443 the fuel trim showed different than -100. I don't recall the numbers but they weren't negative. The truck runs good. It has a rough idle at startup & sometimes a rough idle when you come to a stop light. It hasn't been off road, flooded, coolant leaks in the engine compartment or the other things you mentioned as far as I know.
Your correct about the fuel trim & the o2 readings. It also has a o2 test function, it doesn't seem to work on the truck either. That test worked fine on the suzuki car I tested the scanner on. Earlier this week I cleared the codes. It was p1443, p0171, p0174. Drove the truck about 300 miles. Checked the codes this afternoon & the only code was the p1443 again. I was surprised the lean bank codes didn't show up. Anyway the MAF reading is .445-465, TPS 18.8-19.2 thanks!
Your correct about the fuel trim & the o2 readings. It also has a o2 test function, it doesn't seem to work on the truck either. That test worked fine on the suzuki car I tested the scanner on. Earlier this week I cleared the codes. It was p1443, p0171, p0174. Drove the truck about 300 miles. Checked the codes this afternoon & the only code was the p1443 again. I was surprised the lean bank codes didn't show up. Anyway the MAF reading is .445-465, TPS 18.8-19.2 thanks!
OK, lets see if we can unravel this one some more.
Were the above MAF readings at idle & in volts???? If so, then raise the engines RPM to a level it would normally be with the vehicle at 60 mph & post the MAF voltage readings.
On the TPS numbers, what units are they, volts, ohms, ect???? How were they taken, closed throttle, WOT (Wide Open Throttle), part throttle????
On the fuel trim readings, you said in your 5/18/09 post, that the "freeze frame" fuel trim data looked different but couldn't remember what the numbers were, so do another freeze frame test & post ALL of the freeze frame data points collected, their numbers & in what units for each reading.
If the O2 sensors are working, your scantool should be able to read their output PID to the computer.
I'm not clear on the "O2 Test" you say your scantool performs on O2 sensors.
Will the scantool read the O2 sensors live data stream???? If not, will it grab the O2 senors PID in the freeze frame mode???? If so, be sure to post those numbers, along with the MAF sensor readings & their units.
Interestng about the lean codes going away, but it might have to do with your lingering P1443 EVAP little or no purge, trouble code.
Have you done any trouble shooting on it yet???? Kinda sounds like a bad vacuum hose, or fitting.
A bunch more trouble shooting thoughts.
__________________
99 Ranger 4dr 4x2 4.0L 5spd auto 3.55L/S Payload pkg2 tow pkg
Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)
Our signature is a sign of a job completed autograph your work with excellence
pawpaw: I hooked the scanner up & the lean codes are back. P0171,p0174. The freeze frame data for my p1443 is STFTB1 7.8, LTFTB1 2.3, STFTB2 3.1, LTFTB2 0. Those are read in %. Rpm 1719, MPH 35. Live data taken at 1750 rpm. Fuel trim bank 1&2 are still -100. MAF 1.141-1.167, TPS 24.7%, O2S show O. Notice fuel trim show up on the frezze frame data but not in live data? I think the p1443 might be the valve or the hose from the canister? Can I test the valve?
ford2go: That's about equus said when I called. Maybe that's why the fuel trim show -100 & my o2s show 0 in live data mode? But freeze frame data for P1443 shows the fuel trims?
Thanks guys for the help.I don't get on to reply with results etc, as quick as I would like because I do Dialysis & I don't feel to good afterwords sometimes. But I try to reply ASAP. Thanks!
Well I'd concentate on fixing the P1443 code, in case it's a vacuum leak, thats throwing the fuel trim into a twist.
Yes you can test the vapor canster purge valve, by having someone turn the ignition from off to run while you listen to see/feel if the solenoid clicks.
You could also hook up some tubing & see if you can blow back through the valve when the switch is off & on. It is vented, so you should feel some resistance to flow when it's closed.
There is more info in the Tech Info thread. Also your repair manual should give check tips.
Your scantool should actuate this solenoid during it's test mode, mine does. Mine will do it during the "Wiggle Test" too.
Is your 97 Ranger a 4.0L???? If so, you may have a intake manafold gasket leak, causing the intermittent lean codes.
Once you get the P1443 code figured out & the O2 sensor no voltage output question answered, maybe the fuel trim numbers will be right.
Right now there are a lot of unanswered questions that could be playing into all of the screwed up numbers.
The first MAF readings of .445-.465 if the figures were in volts, seem ok, if the readings were at warm idle.
The second set of MAF numbers of 1.141-1.167 (I assume were volts) & 1750 rpm @35 mph, seem ok.
The MAF voltage should rise to about 2 volts at a rpm that yields a speed of around 60 mph. In other words the MAF voltage should rise from idle, to higher RPM & your's is, so it would seem at this point that the MAF sensor is likely ok.
The TPS numbers seem ok for the speed & RPM.
So your left looking at the zero voltage numbers for the O2 sensors, the P1443 code & screwed up fuel trim values, which could be corrupted by a vapor system vacuum leak, or bad O2 sensors & interittent lean codes for both cylinder banks.
My OBD-2 99 4.0L Ranger & OBD-1 94 Taurus 3.8L both have O2 system monitoring on my Actron CP-9145 scantool & seeing as how your scantool read the Subie O2 sensors ok, you likely have something wrong with your Rangers O2 sensors or wiring.
__________________
99 Ranger 4dr 4x2 4.0L 5spd auto 3.55L/S Payload pkg2 tow pkg
Details are trifles but trifles make perfection & perfection is no trifle
(Ben Franklin)
Our signature is a sign of a job completed autograph your work with excellence
Thanks for all the good informatiion. I'm going to look closer for a vacuum leak & maybe replace a few hoses. I read about the intake leaking on the 4.0, which I have. I hope that's not the cause of the lean codes. I'll keep you updated on what I find. Thanks!
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actron/equus scanner check o2 readings
I don't recall the numbers but they weren't negative. The truck runs good. It has a rough idle at startup & sometimes a rough idle when you come to a stop light. It hasn't been off road, flooded, coolant leaks in the engine compartment or the other things you mentioned as far as I know.
