Replacement of Injectors
#1
Pit Crew
Thread Starter
Replacement of Injectors
Today, I got back from the dealership and was told I need to replace the following parts below. I did decline and looking to repair either on my own or finding a good mechanic in San Antonio.
a little background on the car.
Stock 2013 ISF with 193,586 miles
codes P0171, P0174 & P1170
replace 8 port injectors
replace PCV valve and Elbow
replace leaking rear shock
I am sure I can handle the shocks. Also I don't want to spend a whole lot on the shocks because of the cost to address the injectors.
Now as far as the port injectors, I am willing to repair but wondering if anyone has instructions and where to get the OEM injectors.
Any feedback or help would be great.
a little background on the car.
Stock 2013 ISF with 193,586 miles
codes P0171, P0174 & P1170
replace 8 port injectors
replace PCV valve and Elbow
replace leaking rear shock
I am sure I can handle the shocks. Also I don't want to spend a whole lot on the shocks because of the cost to address the injectors.
Now as far as the port injectors, I am willing to repair but wondering if anyone has instructions and where to get the OEM injectors.
Any feedback or help would be great.
Last edited by ISFCOBRA; 02-01-22 at 07:45 PM. Reason: Correcting title
#2
Tech Info Resource
iTrader: (2)
Here's the list of possibles for your P0171 and P0174:
Did they already try a fuel system cleaner like BG44K? That's where I would start. Sounds like the injectors are varnished up and need to be cleaned to me. It's incredibly rare to need to replace all of your port or direct injectors. This kind of result is more often just bad fuel or dirty injectors. TBH - this is the first time anyone here has had a problem like this. Usually replacing an injector is because it got broken during a valley plate repair, and then it's only one or two. The other very real possibility is a cracked hose, like the one from the PCV valve to the intake manifold. With the mileage you have (very similar to mine +/- 1k miles) the PCV hose is as brittle as glass at the manifold end. I replaced my PCV valve a while ago, and the hose was definitely in a bad way. Same thing with the EVAP purge line that is right next to it on the manifold. So, if this were mine to fix, I'd do it like this:
1. Get a can of BG44K and put it in the gas tank.
2. Replace the PCV valve and hose (not the easiest task in the world, but doable).
3. Replace the EVAP purge solenoid hose.
4. Inspect all other vacuum hoses for deterioration and replace anything suspect.
TEST.
I really, really doubt you need to replace your injectors. That would be bizarre.
Also - if you have an AOS or catch can, bypass it with a direct hose from the PCV valve to the manifold to test for a leak in that device.
- Intake system
- Fuel injector assembly for port injection
- Fuel injector assembly for direct injection
- Mass air flow meter
- Engine coolant temperature sensor
- Fuel pressure
- Gas leaks from exhaust system
- Open or short in air fuel ratio sensor (bank 1, 2 sensor 1) circuit
- Air fuel ratio sensor (bank 1, 2 sensor 1)
- PCV valve and hose
- PCV hose connections
- Wire harness or connector
- ECM
Did they already try a fuel system cleaner like BG44K? That's where I would start. Sounds like the injectors are varnished up and need to be cleaned to me. It's incredibly rare to need to replace all of your port or direct injectors. This kind of result is more often just bad fuel or dirty injectors. TBH - this is the first time anyone here has had a problem like this. Usually replacing an injector is because it got broken during a valley plate repair, and then it's only one or two. The other very real possibility is a cracked hose, like the one from the PCV valve to the intake manifold. With the mileage you have (very similar to mine +/- 1k miles) the PCV hose is as brittle as glass at the manifold end. I replaced my PCV valve a while ago, and the hose was definitely in a bad way. Same thing with the EVAP purge line that is right next to it on the manifold. So, if this were mine to fix, I'd do it like this:
1. Get a can of BG44K and put it in the gas tank.
2. Replace the PCV valve and hose (not the easiest task in the world, but doable).
3. Replace the EVAP purge solenoid hose.
4. Inspect all other vacuum hoses for deterioration and replace anything suspect.
TEST.
I really, really doubt you need to replace your injectors. That would be bizarre.
Also - if you have an AOS or catch can, bypass it with a direct hose from the PCV valve to the manifold to test for a leak in that device.
Last edited by lobuxracer; 02-01-22 at 10:09 PM.
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#3
Pit Crew
Thread Starter
Lobuxracer, thank you for the info. The dealership did not try anything besides giving me the bad news and quote of 4k to repair this.
I did say pretty much stock but I should mention this is all I have done to it
Oil catch can from RRacing that I need to replace as it leaks if I don't change before the mid point
A non oiled filter and RR racing intake tube.
I did clean the mass airflow sensor recently hoping that would clear my codes. The car is not sluggish and throttle response is the same but as far as fuel goes I do stick to 93 but pretty much from any gas station. I don't stick to a specific brand of gas.
I will work on what you have recommend to be done asap and let y'all know.
thank you David
I did say pretty much stock but I should mention this is all I have done to it
Oil catch can from RRacing that I need to replace as it leaks if I don't change before the mid point
A non oiled filter and RR racing intake tube.
I did clean the mass airflow sensor recently hoping that would clear my codes. The car is not sluggish and throttle response is the same but as far as fuel goes I do stick to 93 but pretty much from any gas station. I don't stick to a specific brand of gas.
I will work on what you have recommend to be done asap and let y'all know.
thank you David
#4
Moderator
Nice to see a high mileage 13. I need to drive my 13 more.
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KHISF (07-06-22)
#5
Tech Info Resource
iTrader: (2)
Lobuxracer, thank you for the info. The dealership did not try anything besides giving me the bad news and quote of 4k to repair this.
I did say pretty much stock but I should mention this is all I have done to it
Oil catch can from RRacing that I need to replace as it leaks if I don't change before the mid point
A non oiled filter and RR racing intake tube.
I did clean the mass airflow sensor recently hoping that would clear my codes. The car is not sluggish and throttle response is the same but as far as fuel goes I do stick to 93 but pretty much from any gas station. I don't stick to a specific brand of gas.
I will work on what you have recommend to be done asap and let y'all know.
thank you David
I did say pretty much stock but I should mention this is all I have done to it
Oil catch can from RRacing that I need to replace as it leaks if I don't change before the mid point
A non oiled filter and RR racing intake tube.
I did clean the mass airflow sensor recently hoping that would clear my codes. The car is not sluggish and throttle response is the same but as far as fuel goes I do stick to 93 but pretty much from any gas station. I don't stick to a specific brand of gas.
I will work on what you have recommend to be done asap and let y'all know.
thank you David
#6
Instructor
What I did for my leaking AOS was switch to brass fittings and Teflon tape on the threads.
I also changed out my PCV and upgraded to Samco oil resistant hoses. Zero leaks now. If I were you I would also stick to name brand gas like Chevron, 76, Shell, Mobil 1, etc……not billy bobs gas station gas.
I also changed out my PCV and upgraded to Samco oil resistant hoses. Zero leaks now. If I were you I would also stick to name brand gas like Chevron, 76, Shell, Mobil 1, etc……not billy bobs gas station gas.
Last edited by ISFpowered; 02-02-22 at 01:58 PM.
#7
Moderator
Reason number 7,012 that I don’t trust dealerships. It’s insane the tech would ever believe every injector died.
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#8
Intermediate
iTrader: (1)
might be, or what the real problem is... We live in a time that no longer values diagnosing and repairing,
it's just easier to say replace everything... I don't know if it's laziness or greed, maybe both.
#9
Tech Info Resource
iTrader: (2)
The tech knows every injector isn't bad, he just decided it's not worth his time to figure out which one
might be, or what the real problem is... We live in a time that no longer values diagnosing and repairing,
it's just easier to say replace everything... I don't know if it's laziness or greed, maybe both.
might be, or what the real problem is... We live in a time that no longer values diagnosing and repairing,
it's just easier to say replace everything... I don't know if it's laziness or greed, maybe both.
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Rickna (02-03-22)
#11
Pit Crew
Thread Starter
Damn, those are some nice looking engine bays. I am planning to work on it this weekend which is to replace the hoses needed, pcv valve and definitely look to replace the catch can asap.
#12
Moderator
You really don’t need a catch can unless you track the car. I ran the RR can and went back to stock to avoid leaks. I’m normal street driving, even aggressive, you shouldn’t be filling a catch can with a healthy engine.
#13
Pit Crew
Thread Starter
oh ok, it never really filled that much. I drained it every oil change which would be about 4 oz's or less. I guess I can just run a "U" hose to remove it.
#14
Tech Info Resource
iTrader: (2)
#15
Driver
iTrader: (8)
When I started blending, both P0171 and P0174 popped up. I would clear it, exactly 14 miles later the check engine light would come back on with the same codes. Took my car to Lexus (bad move on my part) and they told me almost the exact thing. They said they recommended replacing the #8 injector cause it failed. I took it to another independent mechanic for a second opinion and he told me I had a bad fuel pump and fuel filter. So I figured instead of going back to oem, why not upgrade. I purchased an AEM 340LPR fuel pump that was compatible with E85 from Amazon. Note, the fuel filter provided with the AEM pump is a different design so I went to Toyota and purchased an oem fuel filter and installed both into the F. I should post pictures of how dirty the filter was! It was caked with black gunk. While doing the install, I unplugged my battery and took out my ecm fuse
Put everything back together, fired it up and no codes. It’s been 2k plus miles since the install and still no codes..
Put everything back together, fired it up and no codes. It’s been 2k plus miles since the install and still no codes..
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