alright guys heres the deal im a minitrucker who recently bought a 88 with a t3/t4 and tell you the truth this is the first mazda i have ever even looked under the hood i know alot about the 4g63 dsm motors but not a thing about the mazda
i have an air fuel ratio gauge and its not leaving the rich position my fiance was riding behind me on the interstate and there was pure gas coming out of the exhust onto her windsheild and when i let off the gas it shoots fire out of the tail pipes it has a full magnaflow system on it
i also have a boost gauge on it and im running 10 lbs but in 3rd and 4rth when i floor it , it spikes to about 18 lbs.
whats your guess i know it could be one of several things i think its boost leaks but havnt had the time to hook up an adapter and test it you guys know more about it then me let me know thanks...

 

What mods?
Does it idle fine?
Does it run fine? i.e. sputtering, stalling, hesitations....

 

man i couldnt tell you the mods like i said i dont know what this car has done to it i know it has a greddy turbo timer hks bov i think it has a aftermarket clutch cause i have never driven a daily driver with this kind of clutch it seems like it has a small miss in the idle nothing big just seems like i can hear a putter in the tune of the idle and it runs fine once the turbo spools but if im in first from a dig with out dumping the clutch it seems its alot slower then it should be but then once the turbo spools it puts you in your seat it has a stock top mount intercooler my buddy who is real big into dsm say it may have to big of fuel injectors i dont have a clue if you told me what to go outside and look for i could but other then that i couldnt tell you the difference from its *** to its elbow

 

Download the FSM (linked to in my sig) and a Hayne's manual. Do the normal tune up stuff (new plugs, change fluids, etc.), and see if that helps.

 

are there any fuel mods or any ignition mods done to the car ?

 

Car sounds like it's been seriously hacked...

More then likely someone has swapped in a set of injectors to make the car now blow up and has no form of fuel control. You should compare the injectors with the factory injectors listed in the FAQ to figure this out.

 

I think he meant "not".

 

no fuel mods or ignition mods from what my eyes can see and yes i belive this car is a hack job there are wires spliced and taped and a rat nest of wires under the dash all i want out of it is a little better fuel milage ,this 5 miles to the gallon isnt cutting it ill give the tuneup a shot but doubt that is going to make it run any leaner