Tuning issues

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Feb 12, 2023 | 07:41 PM

mrmumbels

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Tuning issues

I’m running into an issue where my LQ9 is asking for lots of fuel at cruising speeds. Running a terminator x max and can’t seem to figure this out. I did find a vacuum leak by blowing smoke into one of the lines with intake blocked. It was a hole I had plastic welded and not done a very good job. after properly repairing it today I tested with a couple rubber gloves over the k take, my air compressor in one line, and a bottle of soapy water. It tested fine and I was excited to go for a spin, but it’s still asking for full fuel at 2k rpm’s. I call it the blob. Anyone have any ideas what could cause this? I’ve posted a pic of my ve table and how much more fuel it wants in learning. Any ideas on what to try would be highly appreciated.

Feb 13, 2023 | 09:37 AM

minytrker

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From: Brenham

Thats not going to help what you posted. It could be from injector data being off, fuel pressure not set in tune correctly, a number of things. Without a tune, log and detail specs everyone would just be guessing.

Feb 13, 2023 | 10:42 AM

mrmumbels

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Quote:

Originally Posted by minytrker

Thanks for the reply! I'm a learner here, and this LS swap is one of my bucket list items.

I'm currently on my second set of injectors as the OEM injectors were limited at WOT. I'm seeing the same results with these. Both injectors were in the Holley drop down with these being GM 12613412. Actual system pressure is set to 60psi and according to my datalogs I'm seeing a consistent 58psi with an occasional 57psi. I'll kick that up a tiny bit tonight. I verified my fuel pressure sensor with a manual pressure gauge as the scaling was off on my initial startup. Map sensor is a cheap Amazon, but its's linear and scaled to perfect atmospheric pressure for my location. I started a tune with a remote tuner, but he didn't seem to be so sure about this blob, and I got the feeling he'd prefer to tune rather than troubleshot my motor remotely. I've uploaded some datalogs and global file. Any help is greatly appreciated.