Yeah it lets you reset and view codes. It even lets you view pending codes too.

 

Over the weekend we packed 6 people into the Rover and took a trip to Crater Lake. It was about 220 miles round-trip and except for the idling issues and one small incident, it ran very smooth and we had an excellent time. New IACV, TPS, and VSS are on the way and likely will fix idling issues, but I don't know if they'll fix whatever incident that happened on the trip.

Suddenly if I gave it throttle above 2100 RPM it would get jumpy and lose power. Below 2100 it was ok though. After a minute of checking the ultra-gauge for clues (MPH, temp, etc all looked normal) I pulled over and popped the hood. I checked all connections and hoses and everything looked good. The only clue was a P1313 and P1314. So I started it back up and for the rest of the trip it ran flawlessly.

 

VSS on edge of failing, remember that one of it's functions is to tattle tale on you and make the ECM think you are on the Autobahn. And your white smoke, now that O2s are in? Where's the pix of Crater Lake?

 

Sorry Buzz, my sister was in charge of photography that day and just took pics of her kids. Rover didn't get its due attention.

White smoke disappears once it's warmed up so I'm guessing I was paranoid and it's just steam. It is 26-40 F here now.

Can't tell if new IACV has helped the normal/low idle yet because it only wants to do the high idle mode lately

The hesitation/loss of power/misfiring/whatever you call it, seems to have become a permanent symptom now. Codes are P1313 and P1314. After more testing it does not seem to be related to RPM but more to throttle. If I give it enough gas to get the revs over 2000-2500 that seems to be enough to make it choke.

Today I replaced the NGK plugs (BPR6ES) with new Champion (RC12MC4) plugs, and a new fuel filter. Made no difference. Old plugs appear half black/white on the porcelain, and light grey on the tip. Might be half black/white because it was running so rich before, and now possibly is running lean.

Fuel pressure at 2000 RPM idle is now 30 PSI. Still no vacuum leaks I can find.

New VSS and TPS arrive tomorrow so I'll be able to rule those out.

Would my guess of bad fuel pump or fuel pressure regulator be accurate? I can hear a grumble... Sounds like a money hungry Rover...

 

Did you replace the 02 sensors yet? What about your live data?

I keep getting P1316. Today I had to reset the codes again, it was P1314 and P1316.

I read live data and the only things I could find were the fuel systems 1 & 2 showed closed.
STFTRM1 (%) -25
LTFTRM1 (%) 24.2^
STFTRM2 (%) -25
LTFTRM2 (%) 24.2^

And on the O2 Sensor readings transistion times were reading 10.2 where the max is .6 Initially it was Bank 1 sensors 1 & 2. Then Bank 2 sensor 1 did the same.

 

No, the fuel PSI spec is 34 - 37, and mine runs on at the 30 mark. So while PSI might be a little low, and maybe indicative of impending doom, it should not be the cause of your current problems with potential catalyst damaging misfire.

 

Hey Danny what you're looking for is in post #45

hmm your fuel trim readings do look wacky but I'm not sure what would cause that. I'm sure you've looked for the obvious things. If you need new O2s I posted the part numbers and prices a couple posts back. They're the best prices I could find.

 

Hmm guess I'll have to wait to tomorrow for the TPS and VSS and report back

 

Be real careful with the VSS. It is a reluctor style sensor, Even metal shavings on tip can throw it off.

 

New IACV seems to have cured low idle weakness. It idles high 80% of the time so it was hard to tell at first.

New TPS and VSS haven't really changed anything, but have ruled them out. I found I place about an hour away that says they have an Autologic system and can reset the ECU. I'll be taking it into them Monday and hopefully that will fix the high idle.

The misfiring may be the last issue now. Still getting P1313 and P1314. It seems to happen after a certain amount of load or after a certain RPM between 2000-3000. It can sometimes be fixed by pulling over and restarting it. Then it pulls strong and smooth through the entire RPM range. Other times restarting doesn't do anything to fix it. I'm guessing crank or cam pos sensor, or clogged CATs.

On a positive note; Grandpa and I went out in the green Oregon mountains today and had a good time shooting and light 4-wheeling. The only issue was on the way down the brakes overheated, smoked some, and had to pull over. Definitely have to get some better rotors.