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HELP!! CAR runs lean then just shuts down.

668 Views 15 Replies 4 Participants Last post by  EvoV///toIXnowX
I have been running e85 for the past few months. I just bought the car 4 months ago and now the car is stuck. It is my daily driver and I am in really desperate need of help. Have kids and a full busy schedule. Never been down this bad before.with a random mechanical issue.

Attached log from EvoScan.

I am leaning to front o2 sensor, wideband needs to be replaced? and the other numerous issues it can be.

Mod list:

ETS 3" intercooler
ETS 3.5" Intake and MAF sensor
ETS Charge Pipes
ETS Open Dump Tube
ETS Test Pipe
MAP Exhaust Manifold
Tial QR diverter valve
Invidia Catback
1300cc injectors
535 Walbro fuel pump
Flex fuel with gauge
AEM afr gauge
AEM Boost gauge - vac at 18
ACT Clutch and flywheel
Upgraded CMC
TPC GT spec Turbo

Raif was the tuner

Car has been running on e85 the past few months and it's been cold so I've been chucking it to e85 woes on bad start ups.

I can't move the car more than 2 houses down before I got stuck and even sitting on my driveway it shuts off. I don't want to go any further than needed and end up needing a tow, pushing the car etc. I live in NJ crowded area so constant traffic and that would be a nightmare to deal with. I think you can see where it shut off where the log shows 0 AFR.

I am waiting on the relay kit from MAPerformance but I bought a good used one to just test and tried the other horn and high beam relays and it got even worse.

I have had boost leaks before and atleast I could drive and just no boost. I'll check for leaks but I don't have a boost leak tester handy.

I am down to bad front o2 sensor, wideband sensor needs to be replaced, check fuel filter (new 535 walbro was installed less than 5k miles ago in September per the old owner), crack in manifold? o2 housing? downpipe, etc? Is there an easy way to tell? From the top I don't see anything that pops out at me.

Freaking raining all day today and expected to snow tomorrow so troubleshooting this thing is an even bigger pain in the ass right now!

Thank you all in advanced!!!


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Could be a lot of things but it sounds like you're losing fuel pressure. Could be a defective pump or pump install issue (pickup, fuel feed hose failure, etc). Do you have a pressure gauge you can watch/log?
Rear O2 was likely deleted and possibly used for a wideband
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Thanks for the update! Glad you got it fixed and didn't give up!
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