can anyone here read trifecta tuner programs data log files?

ive had a hickup issue with my car for a long time now its so noticeable since i got the GMS1 put on. after a high boost run not past 60mph ill be in 5th gear just rolling when it gets to 2k rpms it like jerks like it dies but the trans keeps it spining, today it did it so violent my friend riding with me thought we hit a pot hole.

 

Did you scan it for any codes?

 

yes non are pressent. the CEL never comes on or flashes.

 

I get the same issue. It feels like the car just stops. It really sucks. I'm worried because I have AFR issues too. I have another post going right now.

 

hell today it did it 3 times while in 4th going about 47 mph. i was like theres something got to be wrong, i bet if i hit the clutch when it did it it would die

 

I thought it was a coilpack a while ago. I replaced all of them and after about 2 weeks it did it again.

 

Was it the plug and play gms1?

 

So you have Trifecta and have just recently added GMS1 MAP sensors to it? I assume you got an updated tune from Vince, right? Also, only Vince can read his logs.

 

no had trifecta removed it do to blowing map sensors, wanted GMS1 and had it installed, this issue was there before its just worse now

 

I'd say if the issue is still there but the Trifecta tune isn't... it's probably safe to assume it's not the tune.

 

qft

 

This sounds familiar.. but I don't wanna say... I had hickups after I finished off my springs the 1st time when no Gm dealer would look at it cuz it wasn't throwing any codes. Needless to say, my issue with the hickuping was 1 or 2 broken lash adjusters and a blown map sensor. Check the sensor first though.. lash adjusters you can't tell unless you pull the valve cover or you know what a Subie sounds like lol.. if you have their engine sound, then you've got, at the very least, a popped lash adjuster sitting inside your head.

 

Good to know, I'll have to see if my lash adjusters are okay

 

well with my exhaust i cant tell if it has a subi sound. it only does it after boosting. and the sensors are new just had GMS1 installed 3 weeks ago today.

 

Check the connections on the sensors make sure they're clipped in all the way.

 

didnt think of that. when i get a chance i will. also whats this MAF relocate for anyways?

 

https://www.cobaltss.net/forums/2-0l...e-info-274495/

Here is some more info from personal experience. Checking it would be quick, just don't be cheap and get a new valve cover gasket.

 

The MAP sensors going out can cause this as well as the wideband O2 sensor going out. Check the car for codes to see if something set despite you not having a CEL yet. Sometimes when the car senses something off with MAP sensors or wideband it will buck and continue driving normally, or will buck and then ignore the sensor(s) in question. Those with an RPD will have it happen followed by a "No Data Available" screen on the boost of AFR display.

It bucks because the ECU is suddenly changing calculation methods. It'll do this too sometimes if you ever try to clear CELs while driving... don't do that when the engine's running if you can help it. lol It'll immediately jerk the cam phasers and run rough for a few seconds until it catches itself.

 

well i only have boost gage, and every time ive checked codes was after shut off. so maby i should check it before i shut it off.

this car has been a problem child since i got it. with the trans, the brembos, intake pipe, and oh yea the dam sunroof switch.

 

The MAF relocate moves the MAF into the coldside pipe, just before the throttle-body. The airflow is supposed to be more laminar down there so the MAF can get a better reading with less fluctuation. It's also for those wanting to put on a BOV on the hotside pipe, that will vent to atmosphere.

 

mine does this all the time in 5th. sometimes jerks last 5 seconds long