Mazda Rotary Club

General => General Technical => Anything Engine/Performance/Tuning related => Topic started by: lotuscorsa on August 24, 2010, 03:38:30 PM

Title: that it i have had it with the boost problem
Post by: lotuscorsa on August 24, 2010, 03:38:30 PM
:mad:I have had enough now.I have 1 bar of boost with the first turbo and when the second turbo comes in it drops right off and back up to .5 bar.I have run out of camness now and getting very p1ssed off with the car.aaaaarrrrrrrhhhhhhhhhhhhhhhhhhhh
Title: that it i have had it with the boost problem
Post by: Rex_FTW on August 24, 2010, 04:56:15 PM
Calm down.. take it to a specialist
Title: that it i have had it with the boost problem
Post by: lotuscorsa on August 24, 2010, 05:49:46 PM
wheres the nearest to harlow essex
Title: that it i have had it with the boost problem
Post by: HK FD3S on August 24, 2010, 06:06:20 PM
Jaydee is N.London Essex dont know his add details or number to hand. Maybe someone can post/make them available to you.
Title: that it i have had it with the boost problem
Post by: Nik da Greek on August 24, 2010, 06:12:20 PM
Probably the turbo switchover flap sticking open in the union so the second turbo is just dumping all its boost straight out the exhaust. It\'s almost certainly a rat\'s nest problem either split vacc lines or burnt solenoids, either of which will send you insane trying to diagnose. As above, take it to someone who can diagnose it properly :Thumbs-up
Title: that it i have had it with the boost problem
Post by: TRex on August 24, 2010, 07:40:05 PM
Nice rant,  
 email or send me a contact number and we\'ll try and get you sorted fellar (though it\'s been a while playing with seq twins).... :)
 diver7diver@hotmail.com
Title: that it i have had it with the boost problem
Post by: neil_jdmr on August 25, 2010, 12:11:08 AM
If you are still on the standard ecu its very likely boost creep and you ecu retarding the timing, i had the same problem till i switched to a pfc. If your already on a pfc then ill go with a check valve probably the one under the pressure tank.
Title: that it i have had it with the boost problem
Post by: lotuscorsa on August 25, 2010, 01:50:16 PM
spent another 2 hours on it today still nothing:mad:
Title: that it i have had it with the boost problem
Post by: HK FD3S on August 25, 2010, 02:20:07 PM
Do you have an apexi ecu/commander or standard ecu?
Have you tried maybe gettinf a hold of a rats nest diagram and checking for split pipes or one that may have popped off.
Title: that it i have had it with the boost problem
Post by: Bobbit on August 25, 2010, 02:21:58 PM
If you have checked all the one way pills and all the visable pipes for splits then chances are it\'s a solenoid issue, which means taking off the phlenum. If you are confident dong this here is a how to on checking the solenoids: clicky (http://www.mazdarotaryclub.com/forums/showthread.php?t=44377)
If you are not confident then take it to a specialist bud
Title: that it i have had it with the boost problem
Post by: lotuscorsa on August 29, 2010, 01:25:16 AM
well today i did The Poor Mans Non-Sequential Setup  and now the car  only boost to 0.5 bar ,so before the first turbo was boosting 1.0 bar and the second was boosting 0.5 ,so still cant sort it out:reallymad
Title: that it i have had it with the boost problem
Post by: neil_jdmr on August 29, 2010, 05:55:59 PM
Switching to non-sequential does not fix boost problems contrary to popular belief for starters, you need to check the remaining solenoids are working as they should.
 
Also is your car standard?, do you have a pfc?, do you still have the cat?
Title: that it i have had it with the boost problem
Post by: lotuscorsa on August 29, 2010, 07:49:37 PM
standardish still got the cat and now i have broken a solenoid great
Title: that it i have had it with the boost problem
Post by: lotuscorsa on November 19, 2010, 08:55:49 PM
its got the better of me i have started to do a single turbo conversion:guinness
Title: that it i have had it with the boost problem
Post by: HaywardRotary on November 20, 2010, 12:57:19 PM
Non sequential can fix certain boost issues.
You need to take it to a specialist really,it might not be much wrong with it, the thing is over the net diagnostics are pretty hard.
Kind Regards
Carl
Title: that it i have had it with the boost problem
Post by: Clarky on November 20, 2010, 09:30:50 PM
Had the same problem, changed the check valve under the pressure tank as you say, and all fixed.
 
 
Quote from: neil_jdmr;712974If you are still on the standard ecu its very likely boost creep and you ecu retarding the timing, i had the same problem till i switched to a pfc. If your already on a pfc then ill go with a check valve probably the one under the pressure tank.
Title: that it i have had it with the boost problem
Post by: stronzen on May 09, 2011, 08:03:20 AM
which pressure tank do you mean ? where is that one located :-) ?
Title: that it i have had it with the boost problem
Post by: neil_jdmr on May 09, 2011, 02:35:07 PM
Its just in front of the uim and behind the alternator