0001tmn

iTrader: (2)

alright on the stock 12a intake hat theres a hole right next to the idle control, right now my car idles like 450-500 and it runs like crap but when i put my finger over the hole it runs amazing it idles perfect at 750 and doesnt shake at all, well i have no idea what this line does i dont know where it goes either. would it be safe to block the hole? i mean is there a bigger problem some where...if i have to i can take a video of it.

trochoid

iTrader: (6)

Download the carb manual from the following link and find it. Only thing I've found that affects idle like that is a 3/8" hose that plugs into the bottom of the air cleaner.


http://www.wankel.net/~krwright/cars/rx7/manuals.html

0001tmn

iTrader: (2)

its really werid i pluged it and the car runs so much better way more power.

DivinDriver

iTrader: (15)

Sounds like the line for the idle compensator. Normally opened by a bimetal thermostat in the air cleaner after the car's up to heat.

If it's open early, it's basically a vacuum leak.

0001tmn

iTrader: (2)

well see thats not where the problem is, its the hole with a hose right beside it.

0001tmn

iTrader: (2)

74RX4

iTrader: (10)

The dreaded shutter valve. Here's some info.

http://www.mazdatrix.com/faq/shutter.htm

Rogue_Wulff

Yup. I call that the "Shudder" valve. When it's bad, it sure makes the engine shudder at low RPM.....

0001tmn

iTrader: (2)

well what happens if you block that hose off....i mean not that i have or any thing

74RX4

iTrader: (10)

That's what many people do. The car should run fine. You might get a little back firing during deceleration.

0001tmn

iTrader: (2)

i did notice i was backfiring when i drove it..doesnt bug me..well it kinda does seeing as my exhaust leaks like a mug lol

74RX4

iTrader: (10)

An exhaust leak will make the backfiring much worse.

DivinDriver

iTrader: (15)

Pictures, so much easier...

The backfiring might be part of the reason for the exhaust leaks, too. They do have some force behind them.