Hey all, so recently i had p1249 "Wastegate Control Valve Performance" show up. I cleared it and went about my day. 2 days later it came back. Cleared it and it just seems to keep popping up with normal driving and towing. I will check it after normal unloaded driving for 3 days and its there. After towing or douring i will check and it will show up.

Im stumped on what could be the problem. I have a aftermarket BD Wastegate installed which i put on back in 07.

My redline was on then i unplugged it a few years back. When the code come up i plugged the line back in to the actuator and it made no difference i still get the code weather the line is hooked up or not.

Any suggestions ?

 

What kind of boost pressure are you seeing? The code simply means that boost is not controllable within the PCM's parameters. I have neither a wastegate or wg solenoid and disregard the code. I had to tweak the adjustment on my MAP regulator (overboost annihilator) to keep the SES light off and setting a code at boost over 22 psi.

 

What Roland said, boost fooler is the way to go but why is this happening to you suddenly? Are you getting the dash error light or just pulling the code?

 

Ive done nothing to the truck performance wise since last christmas when i installed my DP.

It just started doing this here in the past month or two

I read my boost pressure off my edge evolution monitor which plugs into the OBDII port. Im guessing it reads the pressure via map sensor. The edge is not installed ! Its JUST for gauges and a quick code reader so i can check codes on the fly with out having the string out the AE.

I replaced the map line from the spider to the map last winter as it looked brittle and had some extra hose laying around. Its all tight and right.

Boost pressures, I was pulling 16 or 18k up a slight grade from a stop the other day and @ 2000/2300 rpm it never went over 10psi. I had to stab it harder to get the boost even close to 12 or 13.
I rarely ever see over 10 at any point in my driving. Im normally always under 22 or 2300 rpm's. Unloaded hwy say 70mph i see 6 or 7 maybe. Crusing at 40-50mph i see 2 or 3psi.

I haven't done a boost leak detector yet but i have ccv mod and every one of the ic boots have been replaced with clays rr boots back in 08.

Im sure my uppies need to be done but i have inspected them with a stick mirror and can't see any soot anywhere. Dosent mean they aren't leaking though.

My intake boot had a small crack starting at the band clamp so i replaced it today. I also have new red and green lines with new rubber boots coming in the morning. Mine were getting brittle and my stealer wanted 15 bucks for the entire setup so i got them. Douring the install of the new boot i checked the turbine wheel. It had no in and out play that i could feel. But it did have some up and down play. I pushed down on it hard and spun it and i could not feel or hear it rubbing the housing.

Thats about all the info i got on the subject but if you need more just ask. I just don't know why all of a sudden i keep getting that code.

 

Bump for the night, check back tomm. NIGHT ALL !!!!!

 

So i put on the new lines green and red with the new rubber boots on the ends. Looking at the WG Solenoid i wonder if its bad and thats why the code is coming up. It seems to only come up when i accelerate hard. Not WOT but relatively hard.

I also wonder how accurate the readings are I'm getting. I guess i don't know exactly where my edge reads the boost psi from. Only place i would guess would be reading it from the map sensor. If so i hear so many people talking about 20 and 22+ psi with STK setups ( turbo, wheel, tuning, etc ) I never see that. Where do most tap in the gauge ? If its Pre IC would the psi be higher there than where the map line comes from the spider ? Assuming thats where my edge is reading the boost psi from.

 

Most boost gauge lines are tapped into the spider/MAP line "post" IC. It is possible that you are getting some skewed readings from the MAP. I have a boost gauge and an Aeroforce Scangauge. My boost readings read very close to each other, until my "boost fooler" limits the max pressure (regulated to 22 psi) seen by the PCM. Pre IC readings won't necessarily be higher, but will react quicker due to the location closer to the turbo. The wastegate solenoid could also be bad and the PCM is "seeing" that there is no noticeable change in boost when commanded to open.

The PCM will control the boost pressure by duty cycle to the solenoid to maximize boosting performance. When pressure is supplied on the red hose going to the actuator (solenoid NOT energized) the valve will open, dumping boost. When low or no pressure is on the red hose going to the actuator (solenoid is being energized) the valve will stay closed.

 

Thanks,

SO if the solenoid was bad and the red line was not hooked to the wastegate i should still see higher psi on my gauge right ? That would just be causing the code to come up every time the solenoid goes to do its job its throwing a code cause it could be bad..... RIght ?

As for the psi i see on my gauge am i correct that the edge is reading it from the MAP via PCM ???? If that MAP was bad would i just see no psi or could it be skewing the reading causing it to show lower than actual ? Is there a way to test the map with my AE ?

 

Right. You have taken away the PCM's control of the wastegate.
Since the AE and you Edge get their readings from the same place, I doubt you'd see a difference between the two. Comparing a mechanical gauge to an electronic reading would tell the tale. You could temporarily tap a gauge inline to the MAP and compare readings.

 

I had thought about doing that honestly just to see. Un plug it throw in a "T" and rig something up.

I was just wondering if the AE could test it some how. Not by just getting a PSI reading but by seeing voltage or something like that. Kinda like checking your BARO, EBP, MAP deal where all read like 14.2 or something like that.

If not i will see if i can play with it this weekend.

Thanks for your help Roland I do appreciate it. I will let you know what i figure out.

I hate seeing those low bst levels on my gauge its really depressing, Took off on flat ground today 22 or 2300 rpm's bout 1/2 throttle maybe a little more and it never broke 6psi. haha

 

I haven't played around with my AE to know what information you maybe able to see (voltage wise) when the wastegate solenoid is energized. Might be something worth looking into.

 

THanks bud i will post back what i figure out !!!