Severe Fuel Cut when attempting to Boost

dimsumgalore

Member
:
2003.5 Mazdaspeed Protege LASER BLUE
What's up fellow members,

I picked my Laser Blue MSP around 9 months ago. The car drove fine with the exception of the common heatsoaking(hahah). My car is lightly modded. It has the following:
Injen cold air intake
Corksport braided steel clutch line
Goodridge ss brake lines
polyurethane front engine mount
turbosmart boost controller
forge external wastegate
prosport boost gauge
SSAFC
Just two days ago I was driving the car normally and then suddenly it was boosting really weird. I stopped the car, started it and the problem became worse. Now when I try to boost at all, it has SEVERE fuel cut. It is to the point where I cant accelerate hard at all. I'm stumped and I've tried to research the problem to no avail. Please provide a fellow member with any insightful thoughts brus.

Sincerely,

Ray
 
+1 also it has been leaking brake fluid, nothing too much but I have to top it off every week or so.
 
Sounds normal to me. Do a search you'll find everything you need to know.
hes got SSAFC so it shouldnt be a problem.
OP, do you have check engine light? have you tried retuning it? theres a bad stock tune but theres ways around it. stock tune usually leans out for a split second when crosing the 3k rpm line i have found. is it RPM dependent?
 
hes got SSAFC so it shouldnt be a problem.
OP, do you have check engine light? have you tried retuning it? theres a bad stock tune but theres ways around it. stock tune usually leans out for a split second when crosing the 3k rpm line i have found. is it RPM dependent?
i didn't even notice that.
OP have you checked all pipes/couplings?
 
Thanks for all the replies guys, It is not RPM dependent, I can ease into the RPMs as high as I want. Only when I try to actually boost(I.E. Boosts goes past 1PSI) on my boost gauge, It fuel cuts like a hell and it hasn't done this before. So basically I can't drive spiritedly or quickly at all. I can't even merge onto a freeway without almost dying. I do not have CEL and I am stumped. I don't know if there is a boost leak(I heard if there is a boost leak, it will stall and is not drivable?) or a exhaust leak. I'm running stock tune on the SSAFC as this is suppose to help lean it out. Could one of the plastic IC pipes fallen off or something? I am stumped as hell, right now im in the process of getting new bushings for the rear sway and some NGK BKR7E spark plugs(researched and saw that the Gap they give is the best for Mazdaspeed?).
 
No matter what plugs you buy they must be re-gapped for the MSP. BKR plugs are copper and work best for regular protgs, get the NGK ZFR6F-11 for the MSP and gap them to .028"-.032". Check your charge pipes for leaks or cracks especially the BPV outlet on the hot pipe. The super stock map is a good place to start with an SSAFC but a custom map will make much more power.
 
Check over all ur vac lines maybe one has a small crack in it. Ur car will still drive with a boost leak it will just run bad like ur sayin
 
Small update guys, I just went and did some minor changes to my car. I cleaned the MAF and drove the car around and it felt immediately better. My friend noticed that I have some cracks in my VAC lines. So now I need to change them and then I'll see where it goes from there. Also changed my rear sway bushings LOL (now it doesn't squeak like a granny's rocking chair).
 
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