Removed HKS EVC = Not boosting past 10.5psi
May 31, 2004, 11:41 AM
#1
Former Sponsor
Thread Starter
iTrader: (9)
Join Date: May 2004
Location: Gaithersburg, MD
Posts: 283
Likes: 0
Received 0 Likes
on
0 Posts
Removed HKS EVC = Not boosting past 10.5psi
Hey guys,
I removed the HKS EVC, rewired the vacuum, the car drivers just fine, but won't go past 10.5psi. I am assuming its running right off the spring and the vacuum is not even being read, or something to the effect thereof.
Any suggestions? I played around with vacuum hoses even - did absolutely nothing, boosts at about 10.5.
Boost is very steady; it does not float around, definetly not a vacuum leak, rather a controlled limit.
Not sure what it could be, any advice really apreciated!
Thank you!
I removed the HKS EVC, rewired the vacuum, the car drivers just fine, but won't go past 10.5psi. I am assuming its running right off the spring and the vacuum is not even being read, or something to the effect thereof.
Any suggestions? I played around with vacuum hoses even - did absolutely nothing, boosts at about 10.5.
Boost is very steady; it does not float around, definetly not a vacuum leak, rather a controlled limit.
Not sure what it could be, any advice really apreciated!
Thank you!
May 31, 2004, 01:04 PM
#4
Evolved Member
iTrader: (7)
Join Date: Jul 2003
Location: NYC/NNJ
Posts: 510
Likes: 0
Received 0 Likes
on
0 Posts
maybe your WG is sticking open? or the solenoid might be bad! just a few options. If all else fails add a manual BC or put the EBC back in...
also did you reset your ecu
also did you reset your ecu
May 31, 2004, 01:08 PM
#5
Evolved Member
iTrader: (3)
Join Date: Feb 2003
Location: Rockville, Maryland
Posts: 1,863
Likes: 0
Received 0 Likes
on
0 Posts
reset the ECU..... They put in a UTEC to replace the EVC.... running on stock settings... I actually tried another selenoid from another EVO.... I dunno about the wastegate
-shahul
-shahul
May 31, 2004, 01:10 PM
#6
Former Sponsor
Thread Starter
iTrader: (9)
Join Date: May 2004
Location: Gaithersburg, MD
Posts: 283
Likes: 0
Received 0 Likes
on
0 Posts
Tested 2 solenoids, same result.
Have not tried a manual BC yet - nor think that it will resolve anything.
Very inclined to say that the WG is stuck because of the very sharp 10.5 limit, seems to be mechanically restricted rather than vacuum controlled due to a leak or improper pull. Its a very sturdy 10.5 hold and it does not flactuate, hence I am thinking its the WG. Also, there may be a slight chance that the solenoid may not be getting electricity to the connector, have not checked for that yet, but thinking that it will throw a CEL on?
Apreciate the replies!
Have not tried a manual BC yet - nor think that it will resolve anything.
Very inclined to say that the WG is stuck because of the very sharp 10.5 limit, seems to be mechanically restricted rather than vacuum controlled due to a leak or improper pull. Its a very sturdy 10.5 hold and it does not flactuate, hence I am thinking its the WG. Also, there may be a slight chance that the solenoid may not be getting electricity to the connector, have not checked for that yet, but thinking that it will throw a CEL on?
Apreciate the replies!
Trending Topics
May 31, 2004, 06:23 PM
#8
Evolved Member
iTrader: (6)
Join Date: Jan 2003
Location: NYC
Posts: 774
Likes: 0
Received 0 Likes
on
0 Posts
It really sounds liek a waste gate prob. Are you running a stock WG? Some EVO owners experienced defective OEM WG which were warrantied.
Also, I am curious if your EVC was on or off when you tested it? If it was off, then you can only boost to the amount the wastegate opens which is around 10- 11 psi.
Also, I am curious if your EVC was on or off when you tested it? If it was off, then you can only boost to the amount the wastegate opens which is around 10- 11 psi.
May 31, 2004, 06:47 PM
#9
Evolved Member
iTrader: (3)
Join Date: Feb 2003
Location: Rockville, Maryland
Posts: 1,863
Likes: 0
Received 0 Likes
on
0 Posts
i am on a stocker.... I got a very early evo.... with the EVC I was boosting to 20.5 psi, now w/o (taken out, put the UTEC in) it its doing only 10.5-11....
if you say the wastegate only opens to 10-11 psi then that really does sound like the issue.......
-shahul
if you say the wastegate only opens to 10-11 psi then that really does sound like the issue.......
-shahul
May 31, 2004, 06:49 PM
#10
Evolved Member
iTrader: (3)
Join Date: Feb 2003
Location: Rockville, Maryland
Posts: 1,863
Likes: 0
Received 0 Likes
on
0 Posts
the utec isnt the issue btw.... for a day I was w/o the EVC or Utec and did the same thing
if it is the wastegate....its just coincidence I guess that it happened now just when the EVC was taken out....
-shahul
if it is the wastegate....its just coincidence I guess that it happened now just when the EVC was taken out....
-shahul
May 31, 2004, 06:50 PM
#11
Evolved Member
Join Date: Feb 2004
Location: Texas
Posts: 621
Likes: 0
Received 0 Likes
on
0 Posts
it would seem strange that with the EVC your car was running great then just remove the EVC which has nothing to do with your wastegate and now its locked up. its possible , but would seem more likely the parts you put back on were the culprit. maybe reinstall the EVC and see if all runs well if not. then more likely wastegate. if you unplug the soledoid it should throw a CEL light.
May 31, 2004, 09:28 PM
#14
Ok, I will go ahead and throw this out here but I am sure I will get flamed 
My friend smoked his #3 piston on his Mk4 supra because when dynoing they had a faulty boost gauge. It was showing 21 PSI when they were actually doing pull after pull at 34 PSI.
So are you sure it's not your gauge?
I am sure you checked this, just throwing it out there.
My friend smoked his #3 piston on his Mk4 supra because when dynoing they had a faulty boost gauge. It was showing 21 PSI when they were actually doing pull after pull at 34 PSI.
So are you sure it's not your gauge?
I am sure you checked this, just throwing it out there.
May 31, 2004, 09:31 PM
#15
Evolved Member
iTrader: (3)
Join Date: Feb 2003
Location: Rockville, Maryland
Posts: 1,863
Likes: 0
Received 0 Likes
on
0 Posts
yea Im pretty sure...I an feel it, plus I have a Blitz turbo timer with a guage that was showing 140 kpa before....which is well over 10psi..... now its @ 80-88kpa.... plus I have a defi boost guage that reads in PSi and its reading 10.5-11.....
so 2 boost guages, both saying the same thing and one that worked and was on before the EVC removal..... but thanks you
-shahul
so 2 boost guages, both saying the same thing and one that worked and was on before the EVC removal..... but thanks you
-shahul