KN SRI Random Boost Issue
#1
KN SRI Random Boost Issue
Hi guys, checked the forums for my answer but didnt get the answer I was looking for.
Installed my KN SRI yesterday, car ran fine for a couple hours, then boom, no more boost. Got out of car, checked everything, crank case vent hose a bit loose, clicked it back, then car runs fine again.
Today I drive for about 20 minutes no issues. Then the problem appears again. It seems to only happen a couple minutes after heavy load or full WOT.
All connections are tight, no boost leaks, no codes. Turbo still spools, but at low psi.
Im guessing MAF sensor...inspected it, has tiny almost not noticeable little scratches (normal with use?). Wouldn't a faulty MAF throw a code?
Changed position of filter. The "N" of the KN faces 11 o'clock.
Or maybe I just need a retune. Car was previously tuned for airbox mod and drop in filter.
Help appreciated. Thanks in advance. Not a big issue, but the random no boost is getting on my nerves.
Installed my KN SRI yesterday, car ran fine for a couple hours, then boom, no more boost. Got out of car, checked everything, crank case vent hose a bit loose, clicked it back, then car runs fine again.
Today I drive for about 20 minutes no issues. Then the problem appears again. It seems to only happen a couple minutes after heavy load or full WOT.
All connections are tight, no boost leaks, no codes. Turbo still spools, but at low psi.
Im guessing MAF sensor...inspected it, has tiny almost not noticeable little scratches (normal with use?). Wouldn't a faulty MAF throw a code?
Changed position of filter. The "N" of the KN faces 11 o'clock.
Or maybe I just need a retune. Car was previously tuned for airbox mod and drop in filter.
Help appreciated. Thanks in advance. Not a big issue, but the random no boost is getting on my nerves.
#4
I will try cleaning it with MAF cleaner. I did touch it with my greasy fingers during the install, and simply cleaned it with a rag, I guess those sensors really are sensible.
Thanks for the input!
My friend has a monitor, will check that too. Mods are in my signature, but problem appeared right after that component install so it must be Short Ram related
Thanks for the input!
My friend has a monitor, will check that too. Mods are in my signature, but problem appeared right after that component install so it must be Short Ram related
Last edited by Sinnerx; 04-16-2015 at 03:57 PM. Reason: Automerged Doublepost
#6
Senior Member
iTrader: (3)
It would be short ram related if it got oil from the filter on it as well as fuel trims being screwed.
The k&n usually doesn't skew trims too bad stock tune but being tuned for the modded airbox may have made it allot worse then stock for skewing trims.
Since you already know about turning the filter to help with trims I imagine it might be the tune.
The k&n usually doesn't skew trims too bad stock tune but being tuned for the modded airbox may have made it allot worse then stock for skewing trims.
Since you already know about turning the filter to help with trims I imagine it might be the tune.
#7
It has to be filter related indeed. It cant be a boost leak since the problem appeared right after the mod. The filter elbow is properly sealed to the turbo as well
Ill try the maf cleaner!
New questions :
Would a broken maf throw a code?
Would a dirty maf throw a code?
Ill try the maf cleaner!
New questions :
Would a broken maf throw a code?
Would a dirty maf throw a code?
#10
Alright here is the update. At 12 and 11 oclock now the car never goes into limp mode but flashed a check engine at wot. 18 afr. Chokes. If I drive normally its all good. Maf is ******* up I guess. Only code I got was a pending P0302 cylinder 2 misfire.
Tuning time?
Tuning time?
#12
Senior Member
Likely bad plug or coil on cyl 2 if that is the only code. Switch coil 2 with coil 4 and see if the misfire changes cylinders. If still on 2 replace plugs your coils are fine. If still misfiring report back.
#16
Senior Member
#17
Problem update
1) Changed all the plugs, same problem, misfires randomly in every cylinder. There was a burnt plug in cylinder 2. We changed all the plugs with gm stock gap...
2) Switched the MAF, same problem, LTFT still hovering around +17
SO im really wondering if the gap could cause all this lol
1) Changed all the plugs, same problem, misfires randomly in every cylinder. There was a burnt plug in cylinder 2. We changed all the plugs with gm stock gap...
2) Switched the MAF, same problem, LTFT still hovering around +17
SO im really wondering if the gap could cause all this lol
#21
Alright, updates, good news this time
I did switch all my plugs for new ones since one was burnt, but kept the stock gap of 0.35
Reduced the gap to 0.32, misfires almost gone, did a heavy 3rd gear pull with only slight hesitation
Should I keep reducing? 0.30?
Thanks all for your time
I did switch all my plugs for new ones since one was burnt, but kept the stock gap of 0.35
Reduced the gap to 0.32, misfires almost gone, did a heavy 3rd gear pull with only slight hesitation
Should I keep reducing? 0.30?
Thanks all for your time
#23
Senior Member
Alright, updates, good news this time
I did switch all my plugs for new ones since one was burnt, but kept the stock gap of 0.35
Reduced the gap to 0.32, misfires almost gone, did a heavy 3rd gear pull with only slight hesitation
Should I keep reducing? 0.30?
Thanks all for your time
I did switch all my plugs for new ones since one was burnt, but kept the stock gap of 0.35
Reduced the gap to 0.32, misfires almost gone, did a heavy 3rd gear pull with only slight hesitation
Should I keep reducing? 0.30?
Thanks all for your time