Solonoids...... + or - pressurs???

Jono FD3 · February 29, 2008, 08:58:29 PM

Guys, I\'m, going to get to the bottom of my problems this weekend come hell or high water as a few mates are getting some respectable jap motors now & only being able to use 4500 of my rpm\'s is killing me!!

Basicaly I need to know if the rats nest solonoids get a +0.8bar only or if it is a -figure!!

what I intend to do is use a bike pump to create the + pressure using a pressure gauge to show when I get to .8bar then do the usual on the electrical conections to check they are working properly!!!

Cheers in advance
Jono

Nad · March 01, 2008, 10:13:44 AM

I\'ve been suffering from no boost and now intermittent 2nd turbo for over a year now and I think I\'ve narrowed it down to Charge Controll Solenoid, which is the one that needs to deal with +ve boost. I changed it for a second hand one and now i have boost on the second turbo but only if i accelerate from 1500rpm(ish) with no gear changes.

Any way ... I\'m going to buy a new one from Mazda but after looking the parts number list for engine components (I can\'t find the link at the moment, it was in a recent thread to do with service manuals, I\'d really appreciate it if someone can find the link for it :chat ) there are 2 solenoids that has a different part number to the rest.

http://www.robrobinette.com/images/hoses.gif

I think it\'s C and F on that diagram. The part numbers should confirm this.

HTH

Jono FD3 · March 01, 2008, 07:29:39 PM

If your having this problem mate it is more likely to be solenoid J: Turbo precontrol. I had the same issue going back a while, changed that and all has been perfect with the transision of the turbos & the second blower has never faild to kick in since!! but at the moment it is kicking in too much & I can\'t cross 5k without over boosting & hitting fuel cut!!

Jono

Nad · March 02, 2008, 09:30:29 AM

To be honest I never even considered the turbo pre-control solenoid ... better go and pick up another one to see if that makes a difference

Atleast it\'s a hell of a lot easier to change that than the ones under manifold.

adib · March 02, 2008, 08:52:22 PM

hi jono does your car cut fuel and then back fire and loose power, if so think i have the same problem mate

Jono FD3 · March 02, 2008, 11:16:33 PM

Mine pulls like a train until the second turbo kicks in a 4500 rpm, keep the throttle open & the boost will just go mental & hit fuel cut missfire ahd generaly throw the toys out the pram!!

Jono

Bobbit · March 03, 2008, 11:17:40 AM

Sounds like the same prob id had, turned out to be the solenoid that controls the CCV (y-pipe), I tested the solenoid and found it to be sticking under pressure and that was causing the probs, did a write up on how to test the solenoid here: solenoid test
and details of my probs and how i tested my theory (3rd post down) here: clicky
Hope this helps bud

adib · March 03, 2008, 01:12:15 PM

hi bobbit
is that solenoid in the rats nest or some where else,if in rats what one is it from front off car
thanks

Bobbit · March 03, 2008, 01:23:18 PM

Hi bud, it\'s the 2nd back if looking from the front of the car

Jono FD3 · March 03, 2008, 11:38:53 PM

Bobbit, was yours overboosting to buggery @ about 5000rpm???

Mine hits fuel cut at this point!! or did before I took the nest out for an autopsy!!

Jono

adib · March 04, 2008, 12:45:27 AM

hi bobbit
had a new one off those from mazda about 2 years ago, think ive a spare on a rats nest i got from here so will try that.
here what happens when i hit gas it back fires and big bang and cuts power and i go forward to window screen and then no boost, is that the same as yours was doing