EFIDynoTuning Forum

decipha wrote: ↑2021 Jun 10, 20:47 maf is the whole tune why cant u trust it ?

car doesnt have to run at all

The MAF is unknown - probably calibrated but for what I don't know. Without being able to know how much air is coming in I don't know how to properly adjust the tune. I guess I could just go pull fuel at different loads but it seems like that is the wrong way to fix the problem.

I will probably do the remote tune next week then. I'll have the cash and hopefully the time. I just never know after holidays, sometimes work gets crazy after a holiday.

Happy Father's Day, Juneteenth, Weekend, and anything I missed.

decipha wrote: ↑2021 Jun 08, 07:31 if its running rich you need to lean it out. If its going rich when going in to closed loop then that means your o2s are not functioning correctly.

I don't want to go changing too much in the T4M2 tune that you created. And since I cant really trust the MAF signal I have I am not sure what I should change to correct the fuel without messing up the balance of the other settings. I am thinking maybe changing the fuel injector values. Maybe even trying to get one of the injectors out to get the actual part number.

I don't think the O2s are bad because they are both giving similar signal. I have not ever had two O2s fail in the exact manner before so I am taking that as an indication that they are working and the mixture is in fact rich. I will test them out as soon as I can just to be sure.

Ideally how well does the car have to run before I can get a remote tune from you?

Fasterthangas wrote: ↑2021 Jun 08, 17:12 To the OP; may I ask what pin and wire color did you use for your wideband? My last car was a '95 and online schematics/wire color didn't match the actual pin I ended up using.

I thought about putting in the wideband but one Krem12 over at AFM said Decipha did his remote tune with just the stock narrow bands.

I went through and did the an initial tune again without going back and changing any values. With that new T4M2 tune I was able to get the car started. It will idle OK but on the rich side. After about 60 seconds it will start backfiring as the mixture starts richening up.

Good thing is the car started, and also all the sensors look to be reporting correctly so I don't think I have to replace wires or sensors.

Blocmi wrote: ↑2021 Jun 07, 09:38 I seem to remember a post in the old forum saying a Spectra FD22 distributer was the equivalent to an OEM replacement.
I can't remember if it recommended replacing the pickup with a Ford pickup, or using as-is.
I've been running one as-is for a couple years now with no issues.

Thanks. When I searched that I found that I have already purchased one of these from Amazon. It looks like I don't even have a an actual Ford core to rebuild at the moment. I'll start looking around to see if I can find one soon.

Thanks for the replies - it is truly appreciated.

I posted the last version of the tune that I tried. The car was getting closer to turning over the more spark advance I added. I will probably have time later today to try again. I have the battery charged back up and ready to go. I will probably add a little more spark advance each try and see if it will start.

decipha wrote: ↑2021 Jun 04, 22:36 That doesn't apply to tunerpro with the K-constant. Changing the injector values will change the maf transfer values so if he put the injector data in the maf would already be updated for a calibrated maf.

I do not understand this K-constant. I think I probably changed the values back when I noticed they changed. I vaguely remember some table was not the way I set it up so I changed it back.

dleach1407 wrote: ↑2021 Jun 04, 21:45 If you dont have to use a chip/tune to run the 30# maf and injectors then you could simply use stock parameters for injectors and maf since its a calibrated maf.

Well it starts but it does not run correctly with the calibrated MAF and stock tune. I am pretty sure the MAF is screwing up the load and spark calibration in the stock tune. I can start the car and drive it if I barely use the accelerator(0-20%). If I push the accelerator down anymore the car will struggle and lug along. I fully expected to have to build a tune after the engine rebuild. I just thought I would be dialing back some fuel from the 30# injectors. With the calibrated MAF it has thrown an extra variable in to the equation and I have no MAF curve for it.

I will check my stuff. I may have kept my stock distributor. Well if the original one that was on the car is an actually Ford distributor then I may have one I can rebuild. Rebuilding them is was no easy task for me. Took forever for me to press the gear off and back on.

I was trying to start a base tune with the T4M2 bin on my 95 Mustang. I was able to get connection to the QH and datalogging looked to be working. I loaded in the modified T4M2 bin into the QH but I could not get the car started. The car would start fine with the stock ECU. I figure the problem is probably one or a combination of two problems I ran into adjusting T4M2 to my engine. My engine builder swapped my stock MAF with a Pro-M MAF that looks from the information on it to be calibrated for 30# injectors. I did upgrade to 30# injectors with the new engine build. The other problem I think may be the spark advance. The stock ecu tune has the spark advance for low rpm low load up at 55 degrees. I am not great with the other tables that adjust spark but if 55 degrees is what the engine needs to crank over then the table I built with the T4M2 bin is way too low. Unfortunately I only had time to adjust up to 45 degrees before the battery died.

Also, the write ups are very specific about using the Ford distributor and nothing else. Is this up to date information? I haven't seen a new non refurbished Ford distributor for sale in 10 years. Maybe I am not looking hard enough but I dont know where to get one in 2021. If anyone knows where you can still get one of those, please let me know.

Hey,
I am new to the forum. Thanks for all the write ups!

I was referred over her from AllFordMustangs to get a tune.