Resolved Project car completed, but wont stay running.

Kdouglas89 · Jan 23, 2015

Car has been down for nearly 6 months while I have been upgrading. The majors I did was rebuilt the head with all supertech parts, and threw in some 272's. I also upgraded to E85 on FIC 1150's and a 255 pump. Also converted to SD. My ethanol rating is 75%, which is normal for my area.

If it sits for a few minutes, it will start for a few seconds then just die. If I start it again right after it just turns but no start. My deadtime is set to 330.

I have attached a log of it starting for a second and shutting off.

Thank you very much!

1995-tsi-awd · Jan 26, 2015

Did you take the sending line off the rail and test flow? Did you clean out everything extremely well? Take return line off and check return flow there as well. How did you clean the gunk out of the injectors? If have good flow pre afpr and post afpr the injectors might be stuck open or closed do to that gunk. I have a set of 550's that need to be cleaned due to similar problems. I self-cleaned them, but it didn't work well enough...

Kdouglas89 · Jan 26, 2015

I activated fuel pump, and I can hear fuel flowing through my afpr. All cylinders have fuel on them, and all plugs have gas on them. There was just gunk on the tips of the injectors. I took them, and I could not blow through them so I doubt they are stuck open. Also I am reaching 43.5 very easy, and when car is shut off it holds 40psi for awhile.

eclipsyco · Jan 26, 2015

So the black goo on the injectors is the problem probably that the filter is full of that goo too! Are you on stock lines? Pull the fuel pump and check the filter on it E85 does infact cause that and is very commun search around what others did to clean that and from now on you have one more thing to on the regular maintenance schedule.

Kdouglas89 · Jan 26, 2015

The goo on the injectors was the KY gel I used to install the injectors in the rail. I am not on stock fuel lines. The 255 has roughly 20 miles on it. The E85 in tank is a week old.

Thanks for the input though, appreciate you and everyone else throwing ideas my way.

inthemidst · Jan 26, 2015

Next time you try to start it disconnect the temp sensor and see if it stays running if it does that means your running way too rich on a cold start.

Kdouglas89 · Jan 26, 2015

As far as im aware, the reading on link is the same reading the ecu is seeing correct? If thats the case, link is reading my coolant at 49-51ish through the day which is about right.

eclipsyco · Jan 26, 2015

Oh sorry! I didn't know your set up was that new! Did you try correcting your global % as I stated in my first post also I just looked at you log again why you have touched the open loop thresholds? As I stated in my second post i believe lock the ECU in open loop and fire it up on cold starts the ECU goes to open loop in order to harm up the engine a bit by touching the thresholds you are no allowing it to do so. Also with bigger cams you'll more than likely need to pull out some fuel down low and add some up top as you'll be flowing more up top but that's after to keep it running smoothly at idle. Good luck!

Kdouglas89 · Jan 27, 2015

eclipsyco said:
Oh sorry! I didn't know your set up was that new! Did you try correcting your global % as I stated in my first post also I just looked at you log again why you have touched the open loop thresholds? As I stated in my second post i believe lock the ECU in open loop and fire it up on cold starts the ECU goes to open loop in order to harm up the engine a bit by touching the thresholds you are no allowing it to do so. Also with bigger cams you'll more than likely need to pull out some fuel down low and add some up top as you'll be flowing more up top but that's after to keep it running smoothly at idle. Good luck!

O wow, I forgot about the thresholds, was using that to fine tune last time it was running. Will correct in the morning. I have tried locking car in open loop mode, with it acting the same way. I do not have classes tomorrow, so I will be spending the day on her, and probably making myself more mad :ohdamn:

Thanks again man, ill update in the A.M.

Kdouglas89 · Jan 27, 2015

I have been doing more research, and have read that a bad AFPR could cause an engine to flood, and soak the plug causing a no spark while in the motor? Whenever I turn on my fuel pump, I can hear bubbling in the AFPR area. Could this bubbling sound be it letting fuel out? It sits at 43.5 perfectly, and holds the pressure pretty well after pump is off.

Kdouglas89 · Jan 27, 2015

I just replaced CAS, and it is having same symptoms. I managed to get a log with it running for a few seconds. Please someone review and see if any numbers dont make sense. To me, airflowperrev is way to high even for a cold idle, and timing seems pretty high and speratic.

buhay6 · Jan 27, 2015

you do have your wide band linked to ECMlink through the appropriate ecu pin correct? (sorry if I missed it earlier in the thread man)
No wide band input means no start.

Kdouglas89 · Jan 27, 2015

Solved! I tried using my old 550's, and after a few cranks she started right up. Looks like they are being sent off to see whats up.

Thank you very much for everyones help! :hellyeah:

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Resolved Project car completed, but wont stay running.

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