maybe my search wasnt the best, but the past couple days iv been looking aroun don the forum. I do believe this is my first post, i didn't want to make it seem like i was newbie to rx-7s (im not too too much, but still just getting welcomed to the world) any way, im buying a t-2, 87 rx. my problem is, the guy says it overheats at idle, i go to turn it on, and it doesnt even stay on, it started and dies. i look at teh engien bay real quick, i saw that the hose from the intercooler to the tb was off. i hook it back up, car starts and dies. cant figure it out .. after pluggin random stuff in, and "jiggling" wires, it stays on, bur the rpms jump from 1500-2000 about 7 times, then just shuts off. any ideas what the problem can be? im def gonna do a rebuild soon, but i need the car SEMI driveable (drive it to my house, and a little more ) any ideas what could be going wrong ? any thing at all is needed ... thanks guys

 

crank the idle stop screw up a bit and see if it will stay running. my car was doing that a while back and i never figured ot out, it was like a "vroom drop vroom drop vroom drop" then i could turn the AC on and it would idle down to about 1200 and stay... never figure it out. but i'd crank up the idle stop screw and see if you can get it to stay running like that (that obviously wont FIX the problem, but may get you home) good luck my man.

 

check for vacuum leaks..do you know how to do that? i think bac also...lets see what others have to say

 

Its probably a broken or cracked vacuum line somewhere.

 

sounds like a busted TPS... Try unplugging it and see what happens. Also check the intake piping for leaks as others have suggested.

-Manolis

 

im gonna read through a haynes book today, and i know my father has a mazda service book for the car som ewhere aroun dhere (he downloaded it like 2 years ago) but i dunno if i can get it for the next couple of days. can some one help me trin to find a vacum leak, and the tps, i know the where the cable runs and every thing, just dunno where the sensor is. thanks guys ... ill let you know what happens, im gonna drop down to his house today and give him a down payment. ether way, i just wanna get it home, and worry about the engine later, i know its in foir a rebuild. i just dont want to tow it.

 

can you keep it alive if you give it gas?

 

yea, i rev it and it stays on for how ever long i keep it above 1200 rpms (estimate) but after it hits like 1k, no matter if i give it gas or not, it dies.

 

bump

 

having the same problem..
i keep the revs up for about a minute..
it'll idle... but it bounces between 1000 rpms and to the point where it is about to stall. vroom stall vroom stall vroom stall......

 

sounds like a big vacuum leak

 

And/or a BAC problem.