P1132 and p1152

Nightmare_GT · Jan 6, 2024

03 gt built motor, Vortech V3, return style fuel system so no FRPS or FPDM. Tuned by Manny at HPP. Washed the motor a couple of weeks ago now I have those issues. I’ve washed the motor a hundred times and never had a problem till now. I did find water in cylinder #4 so I blew it out.

I’ve been chasing this issue for the last 2 weeks.

So far I have…

Replaced 02 sensors with cheap Amazon ones. I have since ordered Motorcraft sensors to see if they resolves it.

Pulled rear harness and cleaned terminals checked connections.

Replaced a broken 02 sensor connector bank 1

Done multiple data logs and data looks fine after I replaced the 02 connector.

Clean mass air

Oil smells of gas

Smoked tested twice for vacuum leaks. None found.

How do you test for a leaking injector? All I got left is to replaced the coils and plugs but I doubt that’s the issue. Car runs fine but the CEL will come on 10-40 miles after I clear it.

I did find a loose connector under the induction tube(black connector)when I pulled on it separated. I cleaned the connections and tape it together along with many of the other connectors on the 02 sensor harness to make sure they don’t loosen up.

I’ve also noticed that it seems to run leaner when cruising. Around 16-18 part throttle.

Any help on where to check to solve this would be appreciated.

Nightmare_GT · Jan 6, 2024

I attached a couple of pics.

Nightmare_GT · Jan 6, 2024

The connection(electrical tape) I found that pulled apart easily.

Nightmare_GT · Jan 8, 2024

At 36 seconds in my video you can see the AFRs go rich for a bit. I was cruising and didn't move the throttle. About a minute after I stopped recording a CEL came back on for the same codes. What would cause this rich condition just randomly? My only option now is to datalog with the laptop everytime I drive to try to get the problem on the log.

Nightmare_GT · Jan 9, 2024

Replaced the plugs and COPs. Old plugs looked fine. Check mass air and cleaned it again. Oil smelled of fuel so Ill be changing it after I fix the issue. Waiting on the Motorcraft 02 sensors then Ill be using a scan tool and data logging to diagnose the car. Hopefully all these parts will fix the issue.

alwayshi · Jan 10, 2024

The fact that both banks are affected/throwing the code - check MAF via datalog and even the main wiring harness (I think it’s passenger side firewall and has an 8mm bolt) make sure that is dry

Nightmare_GT · Jan 12, 2024

alwayshi said:
The fact that both banks are affected/throwing the code - check MAF via datalog and even the main wiring harness (I think it’s passenger side firewall and has an 8mm bolt) make sure that is dry

MAF is reading .6g/s with key on engine OFF. That seems a bit high and Im trying to find out what the baseline should be.

https://www.pmas-maf.com/wp-content/uploads/2014/08/hpx-e.xls

Transfer function cart^^^^

Nightmare_GT · Jan 12, 2024

Installed new Motorcraft 02 sensors and the my AFR still shows lean on the drivers side. Doesn't seem like the new 02s fixed anything. I went ahead and ordered a new MAF because Ive ruled out everything else at this point. Ive checked the wiring and connections 100x. I went as far as removing the rear harness and removing some the loom to inspect the wiring. Ill go over it again this weekend to see if there is anything that would cause this.

alwayshi · Jan 12, 2024

Nightmare_GT said:
MAF is reading .6g/s with key on engine OFF. That seems a bit high and Im trying to find out what the baseline should be.

https://www.pmas-maf.com/wp-content/uploads/2014/08/hpx-e.xls

Transfer function cart^^^^

What did it read at idle, and at 1500, 2000rpm?

Nightmare_GT · Jan 13, 2024

alwayshi said:
What did it read at idle, and at 1500, 2000rpm?

If I remember it was around 13. Something at idle. I don’t have the scantool anymore but I have some data logs but they don’t read in grams. PM me your email and I can send those logs over if you wanted to check them out.

alwayshi · Jan 13, 2024

Nightmare_GT said:
If I remember it was around 13. Something at idle. I don’t have the scantool anymore but I have some data logs but they don’t read in grams. PM me your email and I can send those logs over if you wanted to check them out.

Shucks. I’m viewing from my phone right now. I don’t see a PM option?

Nightmare_GT · Jan 13, 2024

alwayshi said:
Shucks. I’m viewing from my phone right now. I don’t see a PM option?

Sent you a conversation. If you dont get it post your email here and delete it once you get my logs.

Nightmare_GT · Jan 13, 2024

Did find a small exhaust leak on the passenger side header. I doubt this is causing my issue as its on both banks but its definitely an problem Ill address later.

Nightmare_GT · Jan 14, 2024

I did find moisture on the mass air wires when I took apart the loom and tape. I’m not sure is this is the cause. It was definitely wet. I dried it out and taped it all back up. I wet over the connections again and took the wires out of the factory loom but didn’t find any moisture.
I changed the evap purge valve and cleaned the injectors. New mass air will be here tomorrow so maybe it all this work and new parts will fix the issue. If it doesn’t then I’m looking to buy a replacement engine and transmission wiring harness.

alwayshi · Jan 14, 2024

Nightmare_GT said:
I did find moisture on the mass air wires when I took apart the loom and tape. I’m not sure is this is the cause. It was definitely wet. I dried it out and taped it all back up. I wet over the connections again and took the wires out of the factory loom but didn’t find any moisture.
I changed the evap purge valve and cleaned the injectors. New mass air will be here tomorrow so maybe it all this work and new parts will fix the issue. If it doesn’t then I’m looking to buy a replacement engine and transmission wiring harness.

I hope that’s it!

Is that knicks in the green with red stripe wire?

Nightmare_GT · Jan 14, 2024

alwayshi said:
I hope that’s it!

Is that knicks in the green with red stripe wire?

Some sickly residue from the electrical tape. I did get into the blue wire a bit with the razor blade but it didn’t expose the wire. I hope that was it as well because if this new mass air doesn’t fix my issues I’m buying a replacement engine and transmission wiring harness.

alwayshi · Jan 17, 2024

Nightmare_GT said:
Some sickly residue from the electrical tape. I did get into the blue wire a bit with the razor blade but it didn’t expose the wire. I hope that was it as well because if this new mass air doesn’t fix my issues I’m buying a replacement engine and transmission wiring harness.

Any update?

Nightmare_GT · Jan 17, 2024

alwayshi said:
Any update?

Thanks to the freeze in Texas my mass air is delayed till Thursday. Once that’s in I’ll take the car for a drive.

Nightmare_GT · Jan 18, 2024

Changed the mass air and reset the KAM. Car is relearning everything so time will tell. My AFRs while cruising are back to normal but my chop chop of my cams is gone. I’ve been told they will come back after the computer relearns.

Nightmare_GT · Jan 19, 2024

The chop never came back after 20 miles with the new mass air so I swapped my original mass air back in and didn’t unplug the battery. Cars cammed idle came back and the AFRs while cruising are back to normal. Maybe the water on the wires to the mass air was the problem? Maybe the cheap O2 sensors or resetting the KAM? Idk anymore. For now it’s running like it should but I’ll update this thread later when I put some more miles on it. Next week I may fix the exhaust leak by installing new gaskets.

P1132 and p1152

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