dra_gon_lee

my car is running pretty good, but is pretty boggy under 3K i just want to adjust the afm under 3K and improve driveablilty at these levels and improve the idle too

any help is appreciated...
thanks
rocky

RETed

Not recommended to mess with the AFM...

If the car is stock or even mildly modified, something is wrong.&nbsp Don't go looking at the AFM for a band-aid fix.


-Ted

dra_gon_lee

ok, so whats the deal? how can i dianose that i have a problem, and what it is...

its got 720 secondaries, greddy intake, f.c.d., 3" d/p, straight through glasspack to a 90 degree elbow(temp exhaust), hks plugs, dual alt pulley, 88 jspec motor and turbo...

this is my first 7 so all the help you could give me would be greatly appreciated...

thanks
rocky

NZConvertible

Explain what you mean by "boggy". Does it stumble or is it smooth? The turbo doesn't come on hard until about 3,000rpm anyway, so it sounds normal.

Grimlock

sounds like you need an apexi safc. that is the only way your gonna modify the afm signal. its about $350.00 at rx7.com. you may be able to get a used one cheaper.

RETed

1) The 720's are TOO MUCH GAS - that's your problem with the bogging.&nbsp I bet this happens at 4kRPM, right?

2) I see no upgrade fuel pump - you're going to end up blowing everything up soon.



-Ted

Grimlock

ted he said under 3k, the secondaries dont come on till 3600k, right?

so the 720's wouldnt be causing his bogging. unless its full throttle when the bogging occurs, do the secondaries come on at any rpm when your at wot?

RETed

Maybe they are leaking?

What the case, the describe set-up is a big mess...


-Ted

dra_gon_lee

ok, when i go to cold start it, i have to rev it at about 3K untill the temp needle starts to move then once it gets to 1/4 it idles lumpy(btw i don't have the bov pluged into the tid) then when i drive for a little bit it will level out and idle around 900-1000. i just cleaned my airfilter and it seemed to help the hesitation, but under 3k (about 2.5-3K) it feels like the car is backfiring and running too rich, but once the turbo spools up it pulls nicely up to 6500.... so what can i do to fix everything? ted since my setup sucks, fuel pump? more grounds? fuel controller? plug up the bov? let me know.....

thanks
rocky

dra_gon_lee

oh yeah its partial throttle when all this happens... its cruising speeds that are affected... i don't think they are leaking i don't really smell a fuel smell or see any liquid dripping under the car at any time....

and no it doesn't happen at 4K the switchover from primaries to secondaries is fine i think, its just the lower end partial throttle drivability....

rocky

RETed

Something is definitely wrong.&nbsp I would do a total tune-up and check the TPS.&nbsp The car shouldn't be running like that to begin with.&nbsp Do you have a boost gauge by any chance?

If you're going to keep the 720's, go with an A'PEXi S-AFC as Grimlock mentioned.

A Walbro 255lph fuel pump will keep things safe.

Before going with the above, we need to find out what's wrong with your car though...



-Ted

dra_gon_lee

ok, im planning on doing a total tuneup anyways, im getting jacob wires, i have some hks plugs ima put in, im going to take the intercooler off and change out all those little hoses with silicone ones, and check the tps, change fuel filter, of coarse flush and fill the coolant with 70-30 distilled water to prestone, change oil and filter, also check the ecu grounds, and change out the battery cables with new ones.... anything else? let me know

im on aim under riceboyh8ter

hit me up if you have it

thanks
rocky

RETed

Those HKS plugs...what model are you using?&nbsp How much did you pay for them?



-Ted

MaxRX7

TPS ?

NZConvertible

I presume you've plugged the hole in the TID, but did you put a check valve on the open end of the BOV? It'll run like a bucket of **** if you haven't.

dra_gon_lee

the plugs came free with the car... they are 4pt iridium... anyways, im gonna change out the plugs, and wires when i get them, and do all the other stuff, and check the tps.... and maybe do the atf trick while im at it... man i hope all this work pays off with a nice and good running rotary,
thanks guys
rocky