Ok I got a question for the boost folks. I dont get many chances to drive my car hard, so I have only seen the following 2 or 3 times. I had the chance to drive the car hard today, and after a split second of WOT, the car had reached near redline and I went to shift. As I was doing this I checked boost and the dash display for a moment read 1.5 bar. I saw this once last winter, thought it might be from the weather after finding some threads suggesting how much air temp affects boost. Its warm now, figured it is time to ask. It only touched that reading, I didn't keep it there. Car has K24s, EPL tune, 5 bar, exhaust.

One other thing to mention is the car has not been driven hard much with the current exhaust, as it was swapped out from a different one not more than 1000 miles ago (last winter). The new one is free-er flowing: )

So what should I check for?
Is it time to do a pressure test?
What concerns should I have at this point?

Let me know if more input is required for proper assistance. Thanks Yo!

Justin

 

Get a durametric cable to log the car.. check for codes...

what was the temp outside?
did it happend after you let off or when actually on boost?what gear? what was sustained boost in 3rd.. thats the measure...

 

Ok, hooked my durametric up. Only code shown was P1349 Camshaft adjustment bank 1. I have been seeing this code since I purchased the car, it comes and goes sometimes every 20-30 miles, sometimes every 100 miles. I usually clear it when I see it to see how often it is coming up. I was told by my shop it is nothing to worry about in its current state, and will address it when I have the need to work on that part of the engine for something more serious. That being said, flame away if I am doing something wrong with that situation...

No other codes shown, what should I log?

Temp was 69/70 just before that, assuming it was still in that range when this happened.

Now that you say that, it might have been right after I let off for the shift. It was at the end of 2nd gear that it happend.

I did not get a chance to pull through 3rd gear this time around, I have seen it hold 1.1 in the past. As I understand this is what the tune has it set at. 92 oct.

Thanks!

Justin

 

do it in 3rd gear... form 2200 to 6700 rpms...


as far as the code thats the cam sensor ... you need to either replace it or the harness is loose... but most likely its the sensor.. bank one is drivers side....
anyone that did plugs and or other work could have not plugged the harness in all way in ...
that shop is wrong... you need to get it looked soon...

 

Got ya, I'll give that a try.

I'll get the sensor warning looked at then. Can you express your level of concern. By soon do you mean, do it before I do the 3rd gear pull, or do it within the next few hundred, or even few thousand miles? For the record, I've put over 6,000 miles on the car with only that code from that area of concern (I've seen abs/psm, sensor, etc.).

Thanks again!

Justin

 

soon I mean like now... I believe its the sensor on side of the head near the coil packs... but not 100% sure.. theres another one on top of the head in front to the left of the Dvs...
its one of them.... I had this issue a while back.... but Im pretty sure its the side one...
I would first make sure the harness is on good... then get it replaced.. if that sensor didnt go bad then its the brass bracket that cracked holding it...
mark

 

HI,I have an new EPL tune for 93 oct. and with 72 injectors,additional 044 fuel pump and k24/18gs,, I hit 1.4 bars in 3th gear and 1.5 bars in 4th with the temp being in the upper 50s. When the temp is in the upper 80s,,I only hit 1.3 bars in 3rd and 4th....... Tony says its safe.....Prior to this new tune,,I switch to a more free flowing exhaust and my boost went up about .15 bars under the same conditions.....

 

Thanks Mark and John,

Mark, I'll have it checked out then. Thanks for the tip. Is this something that can be got to while doing the coils/plugs? Can I have them piggy back those onto this to help justify the expense to myself? Any knowledge as to approximately how big of a job we are talking about?

John, Thanks for the input, good to hear there are times when the 1.5 is ok.

Justin

 

You dont want to see anything near 1.5 bar trust me... not on pump... IDK your situation but we do not run more then 1.25 bar with injectors... but then we use a different tune... my point is... dont look at someone else and think its ok just because they did it... the real test is 3rd gear pull.... if you let off up on top the car usually spikes.. and thats probably what your seeing...
if you dont have after market WGs you car cannot even go past 1.2 bar... only way is of your Wg lines came off and your car is doing run away boost... then be careful...
If you log your cam position on your bank one during a pull when you have the code I bet its not right( might just read 0 or no movement at all).. if so your car is not running right.. so be careful... durametric will show it...

 

Ok got you.

So if this is the case, is this still something to be concerned about?

I do have aftermarket WGs, 1.0 bar.

So is what you suggest I do next? If so, would you mind sharing what I should get logs of? Thanks.

 

Sorry for not expressing my gratitude for the assistance, it is bumming me out to hear this. Thank you very much!

 

I would worry more about the cam sensor code then the boost issue...

Bottom line is the part is like $140 but the dealer will kill you to change it... irony is that it can be changed without talking anything out... its next to the coil packs... 2 screws holding down the bracket which holds the sensor in place... Im almost certain its that one... otherwise there is another one on top...
If you wrench a little you can do it yourself...
log a 3rd gear pull from 2200 to 6700 WOT.
rpm
engine load,
ignition angle
oxygen sensing, lambda actual value bank 1 and 2...
boost pressure of sensor...

and look for a cam position for bank 1 and 2...

if your WOT and you see 1.5 or higher while on boost lets say at 5500 then let off... but if you dont see it until you let off then its just a spike.. the log with show it...
I would not run more then 1.2 bar on a 5 bar FPR... but thats me...

 

+1 Markski knows his stuff. I could only run 1.0 bar with a 5bar to keep the injectors from 100% duty cycle... That's why I just did injectors so I could turn it up safely. Now I can run 1.2bar on 93oct with around 70% injector duty cycle...

Most likely the 1.5 is just the spike from letting off, but a log will definitely tell. When did you do all those mod Justin? Ninja modding are you? lol

 

+ 1. fix the sensor first !

 

Hey Mark,,Their are several of your posts in the past that say that YOU run 1.3 bars with your k24/18gs and only a 5bar with your tune,,safely on 93 pump gas??..Also,then that means you are saying here, EPL/Tony is risking our motors at that level with his tune???..