Another look at my tune thread... Turbo 5.3

[itsforsale2]

Thanks for the help in advance. I have attached my latest log and my current tune for reference. The truck is a gen1 s10 with a JY 5.3 and a disposable 700r4 trans. The cam is a TSP 220/220 114. The injectors are decapped stockers so roughly 80 lb per hour. The turbo is the infamous On3 76mm. I have had hptuners on the truck for about a year before going to boost. I also tuned the truck to run good with the larger injectors before the turbo so under vacuum the truck does great. I have the wastegate set to open at roughly 2-4 lbs of boost at the moment. The problem I am having is that I am getting kr when under boost. I have my timing dialed way back. The other problem I am having is the scanner will only read up to 105 kpa. I have a 2 bar map installed but when I change the linear and offset to 200 and 10.33 the truck wont run its so rich. I change it the 94 linear and the truck idles and runs great however under boost I am skeptical its working correctly. I suspected the 2 bar map from china is not really a 2 bar map so I ordered another one from summit. Part number. 12615136

Am I on the right track with a real 2 bar map or is there something I should be changing along with the map values?

I do have a wideband its just not logging. Don't worry about letting me know how to log with the wideband I can figure that one out.

I also don't have immediate access to a dyno but if I can get this thing working correctly I will be scheduling a trip.


Thanks again for my rant.

[adunphy]

Sounds like the MAP sensor. Easy way to check is to back probe the sensor with a fluke with key on engine off. If its a true 2 bar MAP, you should be right around 2.5v at barometric pressure (~100 KPA). The sensor is a 0-5v.

[itsforsale2]

Thanks. That worked. I tried it with that sensor and my new one. The one from summit worked great.

If anyone is wondering

DONT BUY THIS MAP SENSOR Ebay Item number 281938112966 its a 1 bar labeled as a 2 bar and it will drive you mad.

[5FDP]

Just to let to know aswell, your file is tuner locked.

May want to change that if you want us to view your files.

[itsforsale2]

I didnt notice that. Here is the unlocked one with my layout and recent log.


s10 turbo mod tune2.hptturbo layout 2.Layout.xmls10 log file 3 29 2017.hpl

[5FDP]

Couple things I saw that should be changed. Cylinder volume doesn't match your engine size, the computer uses that in calculations so it should be corrected. All 3 MAF dtc's need to be set to fail on first error and not left on 2nd error.

I would return the linear and offset settings back to what they should be for the 2 bar map now that you have the correct one and start re-tuning from there. If it's rich at first, just pull fuel out of it and start tuning.

[itsforsale2]

Thanks. I will go through it and post a followup.

[itsforsale2]

I change the settings you suggested. So far its running great. A little too rich under boost but nothing to worry about yet. Thanks