tomaszjc7

I got my car back from the shop a few weeks ago and everything seemed to be running fine until I took it out for its first official ride, cause I didn’t have insurance earlier. Anyway, so the car has a new rebuild with 3mm seals and its street ported, BNR stage 2’s (non-seq), Power FC, dp, mp, FMIC, 1300cc, walbro FP, act clutch, underdrive pulleys, and no emissions equipment at all. It left the shop with an oil leak coming from the oil pan which was due to improper installation (by me). After about a few weeks it started acting very strange, its practically impossible to get the car moving from a stop and it seems like there’s now power below 3K rpm. Although once in a while it’s OK, just for a little bit. While I’m driving it also starts choking or stuttering the second I hit the accelerator to the point where you can feel some tension, kinda like where the car begins to engage the boost. The car, after about sitting for 5 to 7 minutes of idle, dies and won’t start back up after it shuts down. It seems to me that the engine is either dumping too much gas while idling and not enough gas while driving..? I’m not sure but I tried starting the car yesterday and it will crank up and go up to around 2K for a while and when it tries to get back down to the idle (900rpm) it just dies. So I’m pretty much quite tired of dealing with my cars ****** PMSing, you think maybe it just needs to be tuned? When I gave the car to the shop it had everything installed other than the turbo’s and they had to replace one of the injectors cause it was broken but I don’t believe anything was adjusted on the Power FC, could this be the problem?
Some steps I took to try to solve the problem were, upping the injector duty to 110% and 120% but that didn’t seem to make a difference, also I put a +0.20 lag time on the secondary injectors, but once again I’m not sure what effect it had on the car cause nothing really changed.

I would truly appreciate if anyone could POST A COPY OF THEIR PFC MAPS and maybe I can see if something would change. I listed the modifications above.

cewrx7r1

iTrader: (2)

Most of your problems are idle and cruise related so why waste time with your secondaries!

First check the engine and all of it's hoses and wiring.
Look for leaks, and disconnected stuff. Untill all engine componets are verified as OK, you are wasting your time. As you said, new rebuilt engine! Most logical starting place.

Look at the commander's display of switch status, etc. and look for malfunctioning there.

Check ignition system and fuel pressure per the manual.

Some large pumps can over power the FPR and cause too much fuel at non boost areas. A fuel pressure gauge is a must on a moddied car.


Baisc maps only show IGL/IGT and fuel correction which is most likely NOT your problem.

You need to check all the other maps in the PFC to a friends PFC.

tomaszjc7

How can i check ignition system and fuel pressure? Thanks for all the advice.

cewrx7r1

iTrader: (2)

Read the Mazda FD service manual and buy a fuel pressure gauge. The three must have gauges are:
boost, fuel pressure, and water temp.