2.0L LNF Performance Tech 260hp and 260 lb-ft of torque Turbocharged tuner version.

Random loss of boost, restart cures it.

Thread Tools
 
Search this Thread
 
Old 09-30-2011, 09:29 PM
  #1  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
Random loss of boost, restart cures it.

Second time this has happened, both similar in scenarios, cruise control set to 80 cruising down the highway and I feel it happen. Just a slight drop in RPM's I imagine, but something tells me.

I put a load on the engine, won't go into boost, RPM's will climb, no CEL, runs fine, just literally says to hell with me.



Both times I've shut the damn thing off, started it up, and it's been fine.



Anyone?
Old 09-30-2011, 09:34 PM
  #2  
Senior Member
iTrader: (1)
 
ramrod1337's Avatar
 
Join Date: 06-19-10
Location: dayton ohio
Posts: 4,110
Likes: 0
Received 0 Likes on 0 Posts
Won't go over 5lbs? What are your mods?
Old 09-30-2011, 09:55 PM
  #3  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
Won't go into boost at all, shut it off, start it back up and all is good again.

Intake/DP/tune, nothing crazy.
Old 09-30-2011, 11:25 PM
  #4  
Senior Member
iTrader: (2)
 
Wangspeed's Avatar
 
Join Date: 10-22-09
Location: Northern Virginia
Posts: 3,146
Likes: 0
Received 2 Likes on 2 Posts
It's throwing codes, you're just not reading them. Likely a leak, or your intake is causing the MAF to get wet, either directly, or indirectly through condensation. I had the problem til I covered my Hahn intake with a K&N drycharger.
Old 09-30-2011, 11:27 PM
  #5  
Banned
iTrader: (2)
 
Chevycobaltss3's Avatar
 
Join Date: 10-24-08
Location: Vine Grove Kentucky
Posts: 12,838
Likes: 0
Received 1 Like on 1 Post
Sounds like limp mode. If no cel vince coulda disabled it. So u could be getting anything.
Old 09-30-2011, 11:41 PM
  #6  
Senior Member
 
raver0789's Avatar
 
Join Date: 01-26-10
Location: Toronto
Posts: 947
Likes: 0
Received 0 Likes on 0 Posts
How many clicks on the motor?
Old 09-30-2011, 11:49 PM
  #7  
Senior Member
iTrader: (15)
 
zrated89's Avatar
 
Join Date: 10-01-07
Location: newportnews va
Posts: 4,191
Likes: 0
Received 1 Like on 1 Post
its the trifecta toon joe just kidding sounds like a leak somewhere or maf getting wet as stated, weird though where yours sits i doubt its that
Old 10-01-2011, 09:38 AM
  #8  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
46k on it, and with my intake location I don't find that possible either.

I do have a code reader, though I doubt it'll pull anything without a physical CEL, I'd have to borrow the one at work for that.
Old 10-01-2011, 09:45 AM
  #9  
Senior Member
iTrader: (5)
 
PenguinPIE's Avatar
 
Join Date: 02-02-05
Location: Vancouver, BC
Posts: 4,147
Likes: 0
Received 0 Likes on 0 Posts
Originally Posted by Joe Schulte

I do have a code reader, though I doubt it'll pull anything without a physical CEL, I'd have to borrow the one at work for that.
Throwing a code doesn't necessarily throw a CEL so give it a try
Old 10-01-2011, 09:52 AM
  #10  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
No codes shown, sure work scanner can pull a history.
Old 10-01-2011, 10:40 AM
  #11  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
The thought of this being a bypass valve issue made my Dejon spring cross my mind.

Found some bashing of the spring after I had ordered it, but for the ease I installed anyhow and never had any of the issues people listed. Nice, crisp hold of 22psi but now I'm wondering if that's a possibility here.

I've been meaning to buy a Forge, but haven't made such a priority.

Thoughts on this being a Dejon spring/BPV issue? I'll fully admit guilt there.
Old 10-01-2011, 10:49 AM
  #12  
Senior Member
iTrader: (1)
 
umrdyldo's Avatar
 
Join Date: 03-06-06
Location: MO
Posts: 11,666
Received 65 Likes on 59 Posts
Maybe go back to stock spring to see if you can fix the issue.
Old 10-01-2011, 12:32 PM
  #13  
Senior Member
iTrader: (5)
 
Ch1ck3n's Avatar
 
Join Date: 03-05-10
Location: Milwaukee, Wi
Posts: 996
Likes: 0
Received 0 Likes on 0 Posts
5lbs limit is a limp mode. Make sure you check your overboost protection, if the car hits the limit it will limp the car until it's restarted. Had an issue with it on one of the lnf's I tuned, turned up the upper boost limit and fixed the problem.

What kind of map sensors do you have?
Old 10-01-2011, 08:21 PM
  #14  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
Still on stock sensors, tried finding solutions to not hack my factory wiring, sold my GMS1 sensors, than a week later CED comes out with the pigtails. Go figure, after 3 years.

Made 17 1/4 mile passes today with no issues, hell I've only had this happen 2-3 times cruising on the highway. Retune to come for Spring, with some changes and probably leaving Trifecta so we'll see I suppose.
Old 10-02-2011, 06:01 PM
  #15  
Senior Member
iTrader: (1)
 
FRQ FLYR's Avatar
 
Join Date: 03-22-09
Location: Illinois
Posts: 740
Likes: 0
Received 0 Likes on 0 Posts
That sux about the sensors/pigtails; was wondering which you were running as well.
I had a similar low boost episode that would occur every other startup it seemed; I assumed pigtails or dirty sensors. Dealership cleared non-specific misfire codes yet problem reoccured. I cleaned my MAF and (re)installed my Forge bpv which had been removed for a time due to a dealer visit; 1st startup produced lowboost then it righted itself and has been "right" for several months now.
Old 10-02-2011, 09:36 PM
  #16  
Senior Member
Thread Starter
iTrader: (16)
 
Joe Schulte's Avatar
 
Join Date: 06-17-09
Location: Holland, MI
Posts: 2,433
Likes: 0
Received 0 Likes on 0 Posts
Threw a MAF code today! Symptoms the same, so I reset the ****** on the highway and cured instant. Time to look deeper!
Old 10-03-2011, 05:35 PM
  #17  
Senior Member
iTrader: (5)
 
Ch1ck3n's Avatar
 
Join Date: 03-05-10
Location: Milwaukee, Wi
Posts: 996
Likes: 0
Received 0 Likes on 0 Posts
You might have a small boost leak somewhere or a dirty maf.
Old 10-03-2011, 10:05 PM
  #18  
Senior Member
 
raver0789's Avatar
 
Join Date: 01-26-10
Location: Toronto
Posts: 947
Likes: 0
Received 0 Likes on 0 Posts
I can almost bet its dirty valves because of the buildup. Can can't make the proper boost all the time, goes into limp mode.
Old 05-09-2019, 12:06 PM
  #19  
New Member
 
Michael Malignaggi's Avatar
 
Join Date: 05-09-19
Location: CT
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
help

Originally Posted by Joe Schulte
Second time this has happened, both similar in scenarios, cruise control set to 80 cruising down the highway and I feel it happen. Just a slight drop in RPM's I imagine, but something tells me.

I put a load on the engine, won't go into boost, RPM's will climb, no CEL, runs fine, just literally says to hell with me.



Both times I've shut the damn thing off, started it up, and it's been fine.



Anyone?

Did you ever fix this? I have the same issue. It losses boost and than pull over restart the car and it comes back again. no check engine light. very random but happening more than often now?
Old 05-09-2019, 03:56 PM
  #20  
Super Moderator
Platinum Member
iTrader: (16)
 
07MetallicSC's Avatar
 
Join Date: 09-29-06
Location: Land of Freedom
Posts: 23,369
Received 211 Likes on 170 Posts
This thread is over 8 years old.... he is LONNNNNNG gone

side note... his car was one of the nicest cars around at the time. OG
Old 05-09-2019, 04:02 PM
  #21  
New Member
 
Michael Malignaggi's Avatar
 
Join Date: 05-09-19
Location: CT
Posts: 2
Likes: 0
Received 0 Likes on 0 Posts
I know its a old post.. I was hoping he would get some notification and maybe reply to me helping me... Same exact issue that has been happening with me for months and trying everything.
Old 05-09-2019, 04:46 PM
  #22  
Senior Member
 
Kolt's Avatar
 
Join Date: 04-19-09
Location: Jackson, TN
Posts: 4,426
Received 361 Likes on 308 Posts
Only by pm would he get a notification if he set up his email to get it. Otherwise your gonna be out of luck. He hasn't logged in in over a year
Old 05-09-2019, 08:00 PM
  #23  
Super Moderator
Platinum Member
iTrader: (2)
 
tomj77's Avatar
 
Join Date: 07-14-08
Location: canada
Posts: 12,015
Received 154 Likes on 131 Posts
I also say maf. I blew the fuse for maf and it did same crap. Wouldnt build boost. Ran super rich.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Abusch500@gmail.com
08-10 SS Turbocharged General Discussion
9
05-23-2019 08:43 PM
vjoel2011
2.0L LNF Performance Tech
26
10-02-2015 12:11 PM
sick_ss/sc
2.0L LSJ Performance Tech
7
03-25-2012 09:27 AM
lebulbe
Problems/Service/Maintenance
14
11-01-2010 03:16 PM
boostking
2.0L LNF Performance Tech
6
07-23-2009 10:02 AM



Quick Reply: Random loss of boost, restart cures it.



All times are GMT -4. The time now is 01:19 PM.