P0172 , + stalling at the lights...any other idea?

[LittleCaesar]

Ever run out of fuel before?

 

[djtc]

Nope never did. Now I have a missfire code

 

[Harleydoc]

You get this fixed yet???

 

[djtc]

Nope!

I tried to figure out the missfire on number 5(wasnt missfiring other then at idle)

Tested all bank 1 injectors with a multimeter ,they all checked out ok.I switched coilpack #5 to #3 ,I then cleared the code and now the missfire code is gone.Still have a very rough idle, bad fuel mileage and still stuck with two P0171's (lean bank 1).My only problem is at idle and the obvious 8mpg.I might tap the banjo bolt on the bank 1 side to check the fuel pressure.Maybe its the fuel pressure regulator..I don't know, this is getting real old.

 

[djtc]

now I just got a P0300+ the P0171

 

[BlackCat914]

now I just got a P0300+ the P0171

That thing is REALLY dumping a ton of fuel now, which explains your poor fuel economy, and probably your missfire. At this point, you need to be careful about ruining your converter. I think you're getting a false lean code. Is that scan tool capable of reading 02 sensor voltage? Another thing to look at is the mass air flow sensor. What did you clean it with? Can your scan tool show you live mass air flow data in real time? I'd like to see those #'s.

 

[djtc]

That thing is REALLY dumping a ton of fuel now, which explains your poor fuel economy, and probably your missfire. At this point, you need to be careful about ruining your converter. I think you're getting a false lean code. Is that scan tool capable of reading 02 sensor voltage? Another thing to look at is the mass air flow sensor. What did you clean it with? Can your scan tool show you live mass air flow data in real time? I'd like to see those #'s.

I bought a new toyota mass airflow.Yes it is dumping alot of fuel, i'm getting 8.5mpg

The scan tool is a cheap unit, I guess the equivalent to what you guys have a harbor freight

 

[djtc]

The only parameters it measures are the one shown in the pictures that'i previously posted.

 

[Harleydoc]

I think the one at the advance here they let you use will read everything in real time. Maybe check them out to see.

 

[BlackCat914]

I bought a new toyota mass airflow.Yes it is dumping alot of fuel, i'm getting 8.5mpg

The scan tool is a cheap unit, I guess the equivalent to what you guys have a harbor freight

ahh, ok. Just to clear a few things up, when you scanned the car the last time, the engine was warm, correct? I just need to know if your ETC temp was correct. Also, it was about 60F outside, right?

I just watched the video's, but the first one doesn't have very good sound quality so I can't really hear what it's doing. The second one just sounds like a very excessive crank before it starts and then runs a bit rough. Next time it gives you a hard time starting like that, push the gas pedal and hold it all the way to the floor. I think it's loading up with fuel. Holding the pedal to the floor cuts fuel flow to the injectors. Don't pump the pedal, literally hold it to the floor and see if it aides in starting.

 

[djtc]

I sent you a pm.

 

[Harleydoc]

Anyone hear if he got the code fixed.

 

[MAC13]

First post for me and saw this thread describing a similar situation I'm having with my 2000 4Runner. Everything began with a bad #4 injector. So I replaced all 6 injectors, cleaned TB, IAC, MAF, new intake gaskets, plugs, wires, upstream O2 sensor. Truck ran great for a few hours but on the way home it started to idle rough and stall at a stop. Seems to improve once you get out of the gate but not completely. Here is a look at codes:

Trouble Code Report

Date: 8/28/2017 7:41:49 PM

Code Type Status Description
P0300 PowerTrain Stored Random/Multiple Cylinder Misfire Detected
P0301 PowerTrain Stored Cylinder 1 Misfire Detected
P0302 PowerTrain Stored Cylinder 2 Misfire Detected
P0306 PowerTrain Stored Cylinder 6 Misfire Detected
P0172 PowerTrain Stored System Too Rich

I also have the PID data. I'm wondering if the sequence of misfires 6,1,2 points to a bad (new injector).

Appreciate any help I can get on this one.

 

[MAC13]

PID Info:

 

[t-panther]

I'm having the same problem as you guys were having. What was the fix for you?
I have a 2000 with 215K. Just had all new gaskets, O2 sensors, injectors installed, and TB, IAC, and MAF cleaned. Fairly new plugs, wires, and coils. Still running rich. Stalled a few times at stop lights. Strong gas smell. Poor gas mileage. Code P0172.

 

[heat]

OEM sensors?

 

[Ithryn]

Anyone ever figure this out? I had a misfire in cylinder 2, replaced coils, wires and plugs, misfire didn't go away so replaced fuel injectors with remans from Rock Auto. Everything was fine for like a day then it started running like crap and blew white smoke that smelled like gas from the tailpipe.

Seemed like it must be a leaky injector so I put one of the old ones back in on the cylinder that had a gas soaked spark plug (all the spark plugs were a bit black but this one was wet with gas) Drove it like 10 miles, then let it sit for like 45 minutes (this was always when the misfire would happen before) then drove it another few miles, everything seemed fine, no misfire, no white smoke, no cel.

This morning my wife went to drive it to work and it was running like crap and died at the end of our street and now it's throwing p0172 again.

Any ideas?

 

[19963.4lsr5]

You may have a clogged cat. Especially if you drove it with a missfire. And even worse if you drove it with a flashing check engine light.


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[Ithryn]

Could be a clogged cat I suppose, we never drove it more than a minute or 2 with a misfire or flashing light, it was dumping a lot of unburned fuel when I was getting the smoke and everything but I never ran it for more than like 2 minutes like that, had it towed home and everything. I haven't gotten a p0420 and it doesn't feel at all like my other car did when the cat was clogged. Theres no smoke now. I just cleaned the maf and I'll see if that helps in a bit.

Anyone have any other ideas? Hopefully cheaper/easier than a new cat?

 

[19963.4lsr5]

Pull the vent line off the fuel pressure regulator and see if it’s wet.


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