hey everyone..... new to the group, but not to rx-7's. i just did an 88' t2 swap on my 91' (dont laugh, i had a 91 se and an 88 turbo, decided to convert the two) anyways...... everytime the turbo kicks in, the vehicle spits and sputters for a second, then boosts great!! why is this???? it never did it when it was in my 88????? since i put the motor in i have done these mods....hope it helps
-apexi twin chamber blow off valve
-660cc primary and secondary injectors (or so i was told)(bought off ebay)
-3" catback exhaust
-custom intake

thats about it (that would affect the motor anyways)... the injectors might not be 660's, but they are 550's at the very least..

 

well a couple of things check the fuel filter and fuel pump strainer. Also check to make sure that your not to rich when your secondaries come on but I don't think this is the case. Um also what fuel pump do you have? the tII one or the n/a one??? hopefully the tii right?

 

do you have your tps adjusted correctly?

 

my fuel pump is from the t2...... the fuel filter is new, but i didnt think of the strainer....never heard of that one..... how do you clean it??? is there a certain product to use, or do you just "carb cleaner" it???? also, how do adjust the tps sensor?????? i never touched the throttle body! that could be he ase also!

 

Do you still have the restrictor pill in the vacuum line to the boost pressure sensor on the passenger side strut tower?

 

??????? hhhmmm.... i might have! i have the rx7.com fuel cut defenser in place, and the vacuum line off the boost pressure sensor has been replace w/ blue silicon hose! did that get rid of it????

 

I'd say there is a pretty good chance it's gone then. My 87 kinda went goofy when I hit boost ,I was running rich, and finally the strainer is on the end of the fuel pump, it's a little rectangle filter, they are only like 4 dollars from mazda.

 

I'm haveing the same problem with my 88 ae did anyof these things fix your problem.

 

if i'm not wrong don't our cars run rich enough as they are and if your secondaries are larger than stock wouldn't you have a slight problem with running rich when you hit w/o something to tune down the secondaries??

again i'm just assuming you don't have some kind of fuel controller since i didn't see you mentioning one??

Frank