EFIDynoTuning Forum

tufgriz

I run A9L/A9L2 on a 8LD ECU but only with the QH. Haven’t burned a chip as yet. Only thing that the 8LD is limited by is fan control. Apparently the hardware does not exist in the 8LD to run fans.

decipha wrote: ↑2025 Aug 28, 10:16 anytime you change the injector data you have to compare the tune to itself and copy over the SP** data to bring it back to where it was.

Awesome, thanks. This is the part I missed.

Checked out all the changes. Mostly makes sense. Looks like you’ve also done some rescaling since I’m N/A and maybe added a little spark.

I’ll give it a run and see how it looks.

Cheers

decipha wrote: ↑2025 Aug 24, 23:09 You didn't copy over all the SP** values most notably the tables, accel enrichment, tseif transient fuel or fn1036 failed load.

Still keen to know what all has been changed in the tune you posted, if you have a chance. Clearly I've missed something in the write up and it would be good to know what it was.

decipha wrote: ↑2025 Aug 24, 23:09 Something wrong with your fueling system or injectors there's a huge variance. Do you have your base fuel pressure set at 55 psi ? roughly 48psi or so with the vac reconnected at idle? Whatever you got going on right now isn't going to work.

What's the best PID to monitor the fuel issue? LAMBSE1 v LAMBSE2? KAMRF? FE%? I'd like to make a few changes and compare.

Thanks so much for taking the time to have a look.

I noticed the differences in the fuelling and thought it might be a problem. Am running at 55psi, just under 50 with vacuum. Pump? Regulator? Injectors? HEGOs? LAMBSE1 appears to be typically 3-5% higher than LAMBSE2 but on occasion, it's the other way around and even more of a difference.

Not sure about copying over all the SP** values. I just followed the details on the A9L2 download page - obviously I've missed something. Where did all the extras come from in the tune you posted? I'll throw the updated tune in it and see how it goes.

I’ve used the TP_IMAF_IEGOs to get the average fuel error. Just thought it could be a problem if the error is dropping from 0.92 to 0.72 while holding the IMAF constant. I’ll repeat all this once I investigate the fuelling issue.

... anyone?

Finally managed to sort out the initial tune for my engine. I think the mistake I made in the original one I posted was assuming the SARCHG would remain at 302 while all the injector data was added. Updated initial tune below.

Managed to get the car up and running (with some throttle input for a couple of minutes berfore it settled) and driving and got a log trying to dial in the MAF and load (also below).

A couple of queries, if I may.

In the log there are a bunch of times I've held the IMAF to a point to check the FE%. E.g. at 0:53-1:01s in the log, IMAF is around 350 and the FE% is about 0.92. My uderstanding is that this is running 8% rich and the MAF curve at this point should be reduced accordingly.

However, when hitting IMAF 500 from 1:27-1:35s in the log, FE% drops consistently from 0.92-0.72. What should I do with the MAF curve at this point?

Similarly, at IMAF 550 (2:26-2:32s in the log), FE% drops from 0.83-0.75 but the holds at 0.75 towards the end. Does this mean it is actually a FE% of 0.75 at IMAF550?

Towards the end, I also did a half throttle run from 2250-5500rpm. The n_TP_LOAD_GUFX History Table reports 0.80-0.85 for these rpm values. What table needs to be adjusted for this - F035A? Is it a multiply or a direct copy and paste from the TP History Table?

Many thanks in advance

ATPCR

I have 24# Ford Performance Injectors: M-9593-AA302. Here is the spec sheet:

https://performanceparts.ford.com/parts ... -aa302.pdf

I'm back on deck now so will post a revised (hopefully useful) base tune shortly.

Cheers

ATOCR

I have a return style fuel system with adjustable FPR. I run 95 or 98 octane pump fuel.

The tune I posted is corrupt (or more likely I messed something up) but the K constant in A9L2 should be 30.

I’ll have another go in the next week or so and see how I go.

red5.0fogger

Thanks for the reference. I studied this all carefully and followed all the instructions … except for whatever it was that I made a mess of. I’ll have another attempt shortly and will be sure to double check the results.

ATPCR

Details should be in my signature. I can’t check as I’m on a mobile right now. Otherwise it is a 302 with 24# injectors and a massflow (now pro M) MAF, which I understand to be a GM product. Fuel pressure is 55psi in a return system.

Cheers all

Thanks so much for having a look at the tune.

I cannot overstate how many times I read through all the write ups before posting. But still I’ve obviously made a fundamental and monumental error somewhere. Unbelievable!

I’ll have another go, making sure to follow the order for the changes and double check once done.

Again, many thanks for taking the time.