Hey guys. Here's the situation. Built 355 (made 500hp using 850 dp) / Stock TBI / 4l60 e / 16168625 ecm.
EGR disabled thru the chip, countless hours of balancing iac / tps to get a stable idle and about 300 burns to date.

My problem is in-gear stalling. It's still a little rich at idle. I drive it anyways and tinker with the fuel and spak tables little by little when I have the time. I havent been too concerned because I have a modded 2" tbi and intake that I'm trying to find the time to bolt on.

It will idle all day long in park or neutral but after I put it into gear it will die after about 15-20 seconds. (code 33 high map). It starts right back up and runs great again. As long as you are moving faster than about 3 mph it wont do it. Any less than that, than you have to put it into neutral so it wont throw 33 and die.

It has a very stable idle at 1000 rpm (stable for what it is) It's not an issue that putting it into gear is lugging down the rpm. This was a very difficult motor to tune. It idles at about 60 - 65 map.

So if you want to use my truck...put it in neutral when you come to a stop light. other than that it has no other quirks! Any suggestions on tuning this anoying gremlin out....I'm going to wear out my shifter linkage if I keep driving it this way! LOL

Thank You, Brandon

 

Raise the value in the .bin calibration for setting the high map code. You are running the 8625, but are you running $E6 or $0D in it? These are the settings for $0D on a stock 350.

;~~~~~~~~~~~~~~~~~~~~~~~~~
;-Error 33: MAP sensor hi
;~~~~~~~~~~~~~~~~~~~~~~~~~
;
L4E56 FCB 10 ;4% TPS, upper threshold to set error
L4E57 FCB 156 ;68 kPa, lower baro limit, MAP diags.
L4E58 FCB 50 ;5 secs, time threshold to set error
L4E59 FCB 0 ;0 RPM, scaled RPM threshold to set error

 

Thanks Fast!
Thats exactly what I needed! I'll try it later this week and post my results.
Brandon