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?

 

Won't go over 5lbs? What are your mods?

 

Won't go into boost at all, shut it off, start it back up and all is good again.

Intake/DP/tune, nothing crazy.

 

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.

 

Sounds like limp mode. If no cel vince coulda disabled it. So u could be getting anything.

 

How many clicks on the motor?

 

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

 

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.

 

Throwing a code doesn't necessarily throw a CEL so give it a try

 

No codes shown, sure work scanner can pull a history.

 

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.

 

Maybe go back to stock spring to see if you can fix the issue.

 

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?

 

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.

 

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.

 

Threw a MAF code today! Symptoms the same, so I reset the ****** on the highway and cured instant. Time to look deeper!

 

You might have a small boost leak somewhere or a dirty maf.

 

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.

 

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?

 

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

 

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.

 

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

 

I also say maf. I blew the fuse for maf and it did same crap. Wouldnt build boost. Ran super rich.