so im at the point where im done blowing off steam and want to fix my car, i became so tired of it acting this way that i ranted about it and now thats over but anyway, its throwing a cel that says its a maf sensor, I do have an atmospheric bov but my maf sensor is re-routed to be pasted the bov and to be about 1.5feet from the intake manifold so thats not the issue....i did however put the 3bar sensors in my car about to months ago so maybe i need to go back and resolder and make sure thats all in check. but its kinda weird as this is the 3rd time i had the 5psi issue and this time its like if i turn the car off and back on its fine and about 2mins later it kicks the turbo out and goes back to 5psi, or if at operating temp i can do a 4th gear pull starting around 3k rpms give or take and the turbo will only run up to 20 psi and hold for about 3 seconds and then kick to the 5psi issue. before this all happened i was pushing 25psi on a zzp pcm that struggled for 2nd gear traction now i have nothing. going to rewire the maf sensors tomorrow if the rain lets up long enough but......

.......until then does anyone have any idea what else could make this issue? i also considered maybe an o ring is leaking so ill replace them too

 

Im also going to delete the bov and cut out a peice of steel to go in its place and just go back to running the stock bpv

 

I had to redo my soldering too on the sensors, i was getting maf performance codes and misfires out of the blue.
If your maf is relocated to the ic pipe and the ecm is tuned for it you shouldn't have any problems with an atmospheric bov, however being able to see whats going in the ecm would be nice, hptuners should almost be mandatory when modding an lnf.

 

yea im starting to realize that....man once i get everything worked out im seriously going to take my car and have someone tune it right with an hptuner or trifecta one

 

Does the pcm have the gmstg1 tune in it?

 

yes i bought the pcm from zzp and added the stage1 sensors and boost reduction in 1st gear options before ordering and trust me from my own experience it wont run right at all without the new sensors, it ran all the way up to 28psi so i let out and turned right back in the driveway, next morning put the sensors in and bam it ran perfect and ran perfect for about two months

 

When you clear the code, does it come back right away or does it drive better for a while until the code sets again?

 

It comes back.. replied to me in a pm... Op does Ure bov stay open long? Also what maf code is ure code. Thatll tell us a bit about what could be happening

 

i believe it was the 102 code but ill have to get ahold of my buddies scanner again to make sure and it takes about five mins after clearing the code to have the cel come up again....

I checked all my connections today and they are good, i pulled my bottom sensor and its oring looked fine, the top sensors oring looked fine also, i put them back. but heres the kicker boys! I put a new turbo in about the time everything was working good because my old one failed but either way when i pulled my charge piping today to take it and make a block off plate I noticed that the top two nuts on the studs that connect the turbo to the dumptube were loose. now im not blaming anyone but i tightend the bottom two from under the car and my buddy had the top two, he said they were tight so either he forget them or they came loose but i made sure to lay the torque on them today and put a second nut on to make sure nothing comes loose, now could this have anything to do with it? cuz i know it couldnt have been helping lol anyways my friend is making me a block off for the bov out of 1/4 in thick aluminum but it will be monday before I can pick it up cuz im working all weekend on 12 hour shifts but ill update on that later

 

If the MAF code is 102, then it means there is no reading at all. this is either a completely dead MAF sensor or the MAF wiring is faulty.

 

Or a bad Pcm

 

hope its a maf sensor if i could pick of the two options lol just got this pcm not to long ago

 

so I had an aluminum block off plate made for the bov's stop put it all in and it ran ok but only ran up to 18-19 psi and then after about 5 mins of driving it kicked again and the cel came on, im headed to my buddies house to borrow his scanner and then ill update again

 

hope its a maf sensor if i could pick of the two options lol just got this pcm not to long ago

 

Well the thing is diagnosing it... All we are doing is leading you in directions that may be correct.or not.sinceit works then falls again look into Ure boost solenoid/ controller on turbo. Make sure its ok.

 

how can i test it?

 

You've been messing with this for a while now. Just bring it to gm and see of they can diagnose something.

 

I think you just sent me a PM asking about oil on the sensors. If you have oil in the intercooler and charge tubes, then you can expect random MAF spikes and generally poor performance. Unhook your lower charge tube from the IC. If oil comes out, then that is the problem. In that case, you need to remove the charge tubes and intercooler and clean all of them out. Then put it all back together and it should run fine.

 

yea cuz im really not sure how much could have went in when the stock turbo blew a while back, i know it got in the top charge pipe where the bov belongs but i guess this is just gonna have to be a weekend project as i go to work tomorrow am and thursday for 12 hour shifts but friday ill be able to

 

well when my stock turbo blew i bought a mitsubishi turbo and used it, so im kinda scared when they find that then they'll be like here's the issue......warranty=voided

 

Like Matt said did you clean your pipes after the turbo install? If not they're probably full of oil from the old turbo. Take the intercooler and crap off and clean it all out. It's a pain I had to do it on the Dsm when the bearings went bad in the turbo. I just used purple power degreaser and hosed them all out. You could probably use gas too. Just make sure they're nice and clean.

 

yea i know lol i hate to but this sounds like a not so fun yet learning experience lol so friday ill be starting this weekend project

 

Also was talking to one of my friends and we both thought maybe the wastegate is shot but how could I check it or the bypass valve for malfunction

 

I guess I should have asked before, but do you have your MAF in the lower charge tube, or still in the turbo intake?

 

I think I read he re-located it. 1.5 feet from the original spot?