blu_gxl

hi, i did the tb mod and found a lot of things b4 i made this post but car still won't idle and runns realy ruff after 4k rpms a lot of back fires and poping and will die unless i give it gas any help or suggestions? oh one more thing i have one more vacume hose (prob.the culprit) it's on the upper intake manifold at the back passenger side i can't remember where it goes to. .

87 n/a
thanks so much
james

Roy James

hhmm.... i would say check the TPS man, do a search and im sure you can find out how to check it properly, and in the Haynes manual it tells you how to do it as well. a Vacume hose will cause some serious idle problems and funny acting car for sure. there are alot of vacume lines, go and look again and give a better description and im sure one of us can help you better, Good luck man

blu_gxl

ok well that's the best i can describe it the line is right at the back of the intake manifold at the passenger rear it comes up right near the secondary fuel rail. i tried to set the tps but i'm thinking bad resistor becaue i can turn and turn andnothing i dis connected the tps sensor and it ran like crap and wouldn't rev past 4k so i know the tps it self is good i have another resistor so i'll try that i guess i'm pretty sure it's that vacume line but can't figure out where it goes dagnabit!!!

james

Turblown

iTrader: (12)

Vac leak.

blu_gxl

yes but does any one know where the hose i was describing go? i've been staring at this so long i've lost sight of where it goes i'd realy not like to take it to the mechanic cause he'll give me crap for doing the tb mod, the basstard

james

blu_gxl

ttt

blu_gxl

bump

Sniper_X

Check the thermowax
the cruise control hose (if u have it)

take a picture, or draw a VERY good one and show us.
I can tell you from there.

rx-7fc

are you sure that hose did not go to the tb but you did the tb mod so you won't need that hose any more

Roy James

yes, take a picture

blu_gxl

i would but no camera right now not sure i'm thinking it is not needed because i did the tb mod and don't need it because there is no change with it pluged or not. it could be the cc hose but it is connected well and not the thermowax cause i removed it when i did the tb mod. i'm sure it's a vacume leak but can't freakin find it i'm just going to take it to the mechanic and see if he can fix it cause i'm stumped and have been working on it far to long to have not found it. i did find a bunch of stuff but have lost the will to keep messing with it. thanks for all the info and help guys!

james

presetlimits

could it possibly be the boost sensor vacuum hose? that hose alone if not connected and loose will not let your car idle and run extremly rough

boostmotorsport

there are 2 nips on the backside of the upper intake man for hoses. One is bigger than the other, is it one of those?

rx7_turbo2

It's not the boost sensor line cause he has an n/a. Is it the bottom nipple on the firewall side of the intake? Was there a green check valve thing on it. If so the throttle body mod gets rid of that completly I believe it went to the "dashpot" on the throttle body for fast idle. When you removed the throttle plates are you sure you plugged the holes for the shaft up really well, there might be a leak from those.

Green

correct me if I'm wrong.. But isn't there a vacuum hose that goes to the top of the LOWER intake manifold? I can't think of it off the top of my head.. but I remember a hose going to the TOP of the LOWER intake manifold UP to somewhere... Perhaps you accidentally pulled that off, and can't see all the way down through the dynamic chamber to see the hose plugin... just a thought..

Detriuch

iTrader: (1)

that sounds like a tps or a vaccum line. let me know what it is man when u fix it. cause im doing my tb mod tomm i dont wanna mess nothing up

Samps

NA's have boost pressure sensors and Turbo's have atmospheric pressure sensors. Don't know why; but that's how it be.