Mazda reman. was finnaly installed onto my car. I've noticed that my idle was at 1000rpm, after it was warmed up the idle droped to 700-750rmp and my boost gauge (vaccum) was viberating significantly. It was caused by the low idle. So i've raised up the idle upto 900rpm. and it was ok, but here is the weird thing.

From the Idle (900rpm) I rev. up to 3000rpm with a quick little tap, but after that the idle does not go back to 900rpm. It hangs around at 1200rpm and then it drops down little by little. Whats going on? Is this nomal for rebuilt motor?

Should I be adjucting the idle screw, and other valve openings?


Thankx!

 

is it broke in yet?....check your dashpot, it might need adjusting

 

where is dashpot? is that a little screw thing with a nut which is attached to the UIM?

it only has 20miles.

 

Bulletin No.: 014/98
Issued: 12/09/98
Revised:

Category
F(O1)

Applicable Model/s
See Below

Subject
TAS (THROTTLE ADJUSTMENT SCREW)
ADJUSTMENT

APPLICABLE MODEL(S)/VINS

All fuel injected models.

DESCRIPTION







Fuel injected vehicles with idle speed control motors should NOT have the TAS (Throttle Adjustment Screw) adjusted for any reason. Refer to illustration. The TAS functions as a stopper when the throttle valve is fully closed. During production, the TAS is accurately set by measuring the airflow rate past a closed throttle plate. Any adjustment to this screw will affect PCM control of idle speed.

Customers complaining of low idle speed should have their vehicle repaired using the Workshop Manual.

Note ^ Tampering with this screw will affect the idle contact switch and/or throttle position sensor settings. This can lead to rough idle and difficulty in diagnosis of idle quality concerns.

^ The TAS locations on the examples below may vary depending on model year of vehicle.