19red88quest Posted April 9, 2012 Report Share Posted April 9, 2012 hooked up my manual boost controller on the stock 12a as the faq stated. 1 goes to mbc then mbc to ovcp.cap 2 and leave 3 open. it will boost to 10 psi in first gear hit second and it over boosts to 18-20psi. what is wrong? Link to comment Share on other sites More sharing options...
19red88quest Posted April 10, 2012 Author Report Share Posted April 10, 2012 let me be more specific so mabye someone will chime in. when i refered to 1 i ment the first port on the actuator (that used to go to the ovcp) now goes to the boost controller. the next port is capped off and the third port is left wide open.anybody have any ideas on why this is happening ? the boost is not steady at all! Link to comment Share on other sites More sharing options...
RonnieJ Posted April 10, 2012 Report Share Posted April 10, 2012 Adjust the MBC and verify with 3rd gear pulls. Your MBC is set way too high. First is always lower because it has the least amount of load on the engine. Link to comment Share on other sites More sharing options...
19red88quest Posted April 10, 2012 Author Report Share Posted April 10, 2012 i set it back as far as possible, tried again. same thing even spikes further than 10 psi sometimes in first. could i have it hooked up wrong? i took the first line from the first port on the acuator to the back of the mbc then the ovcp to the front of the mbc. Link to comment Share on other sites More sharing options...
RonnieJ Posted April 10, 2012 Report Share Posted April 10, 2012 What MBC do you have? Link to comment Share on other sites More sharing options...
19red88quest Posted April 10, 2012 Author Report Share Posted April 10, 2012 its a amc bought it off of Gamble88 Link to comment Share on other sites More sharing options...
19red88quest Posted April 10, 2012 Author Report Share Posted April 10, 2012 sorry its a ams. i switched the lines so the ovcp went to the back of the boost controller and the first port on the actuator went to the front of the mbc. set up this way it didnt spike as badly but the boost was not steady as it bounced around alot . Link to comment Share on other sites More sharing options...
RonnieJ Posted April 10, 2012 Report Share Posted April 10, 2012 (edited) This is the way the MBC should be connected. Your boost source should be coming from the OVCP. As for the wastegate actuator im assuming you have a 3 port correct? Leave the lower port open use one of the top 2 and cap the other of the top 2 you arent using. http://i44.photobucket.com/albums/f5/brute_nm/mbc2-1.jpg And from googling Starion MBC install I found this http://carphotos.cardomain.com/ride_images/2/3248/541/20617770103_large.jpg Edited April 10, 2012 by RonnieJ Link to comment Share on other sites More sharing options...
Caliber308 Posted April 10, 2012 Report Share Posted April 10, 2012 Try closing it all the way. Then adjust it back out again. I had a similar problem with a Turbo X/S MBC, that fixed it. Bill Link to comment Share on other sites More sharing options...
19red88quest Posted April 10, 2012 Author Report Share Posted April 10, 2012 ok thanks, i have it backwards. my boost source is coming from the actuator and its sending boost to the ovcp. gonna switch it around tomorrow and see what happens. thanks. Link to comment Share on other sites More sharing options...
19red88quest Posted April 10, 2012 Author Report Share Posted April 10, 2012 the way mine is its counter clockwise for less boost and clockwise for more boost. tomorrow when i switch the lines going to the mbc around i will back it all the way out and start from lowest psi Link to comment Share on other sites More sharing options...
Caliber308 Posted April 10, 2012 Report Share Posted April 10, 2012 (edited) ok thanks, i have it backwards. my boost source is coming from the actuator and its sending boost to the ovcp. gonna switch it around tomorrow and see what happens. thanks. To see a picture of how it is supposed to be hooked up to a Three-Port Waste gate go here: Starquest FAQ ForumPage FourMBC and Three-Port Waste gate hook up by JAinsworth Bill Edited April 10, 2012 by Caliber308 Link to comment Share on other sites More sharing options...
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