Hello,

I have a small turbo setup with holley hp ecu and noticed some strange numbers on the laptop and data logs.
fuel system: a1000, aeromotive regulator, return style, siemens deka 80, and I run pump 93.

During my short drive the car began going pig rich. I was seeing 10s, dipped into the upper 9s, and made its way to the 11s while cruising. I knew something was wrong and I headed back home within 7 minutes. Car sounded like it now had a rowdy cam, the exhaust note was different( possible sound from missing ) and I believe I may have felt a little more vibration in the car.

On my holley ecu screen save I noticed the AFR issue first, I saw CL comp going large into the -30s and -40 range which I have never seen. I also saw the vacuum/boost gauge at -3 when it's usually at -8.

I pulled all.the plugs and only one or two had a smell of fuel.on them. One looked a little wet but not soaked. Is this how it usually is? Plug tops were dark and fouled but I assumed from that pig rich drive. I also thought maybe those two plugs mistaking weren't tightened all the way and got the fuel smell from that maybe. The plugs have less than 40 miles on them and we're installed new by me and gapped.

I also pulled vacuum line from the regulator to see if any gas was seeping out of it when fuel pump was on, car off and nothing came out.
I tested the injextors with my multimeter and they were all within range of each other. I knowbrhis doesn't stop a stuck or faulty injector but I was hoping I could find the problem. I don't own a stethoscope and intake along with downpipe is currently off car so I can't just start it up again in a few days.

Thoughts or ideas please? Thank you

 

Yes it does. STOP where you're at. Stop all fuel supply, pull the plugs and turn over motor by hand. You're probably about to window your block.
Then you need to get the injectors out and check them. I have a few that are stuck open and can blow air right through them.
Most likely if you can carefully pull up the fuel rail with injectors still in it, you may see which one(s) are dripping fuel. But like I said, you need to pull plugs, turn over by hand to push excess fuel out of the cylinder. It's just filling up as it sits.

 

Check for an intake vacuum leak

 

Thank you for your advice sir. I have been getting opinions of maybe a faulty maf sensor, vacuum leak before my 02, faulty wideband, and also the injectors.

The injectors were my first thought but I listened to people smarter than me and called holley tech support which did not help me at all and led me down a rabbit hole.

I currently have the intake off and my whole turbo side of my setup, half the engine. I have injector wiring from my golley ecu unplugged.

All the spark plugs are out so I can turn the engine over without ignition to try and get the fuel out. When I first lifted my injectors rails off I had quit a bit of fuel dropping. I couldn't see exactly which ones were.

I'm okay buying a new set of Deka 80 injetcors from a reputable source for $360 if this solves my problem. This would be very painful if I do this and the problem remains or this was misdiagnosed by me. We don't have a holley tuner or dyno in the area.

Any other advice or ideas sir?

Thank you so much

 

I just did this afternoon for a few hours. Engine has been taken apart so its harder now. I'm trying to order a few more new gaskets.

I had plans for this car and I failed bad

 

LM7turbo- And you wonder why I replied as I did to your other identical thread in the EFI forum??

 

Is this a new problem or is this the first time driving it?

Holley EFI does not have a MAF sensor.

If you had an injector stuck, it would have filled the cylinder up with fuel.

 

this is a new problem. I have had the holley ecu on the car for three seasons. Did I type maf sensor? I meant MAP sensor.
I did have two spark plugs that were a little wet and smelled like fuel, not soaked or anything.