car dies when engaged to drive or reverse

1997 MAZDA 323
160,000 MILES
Avatar
PAUROKISTA
  • MEMBER
  • 6 POSTS
rpm is on 1.2 when ac is off and in park or neutral.
rpm is on 1 when ac is on and in park or neutral.
rpm is 0.4 when in drive or reverse almost letting the car vibrate too much and letting the car die it doesnt matter if ac is on or not still when shiffted to drive or reverse rpm just goes down to 0.4 while stepping on the brakes..
May 12, 2013 at 7:27 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
make sure there is no vacuum leaks. beyond that, it could the the idle air control.

Roy
May 12, 2013 at 8:28 AM
Avatar
PAUROKISTA
  • MEMBER
  • 6 POSTS
(Replied on May 12, 2013make sure there is no vacuum leaks. beyond that, it could the the idle air control.

Roy

Answered by ASEMaster6371 (expert)
24,581 answers provided)

we just replaced the air filters hose and cleaned the filter. aside from that we already fixed the c02
its a mazda 323 familia at tranny..
idle is good when in park or nuetral but as soon as you shift to drive it just suddenly go down to 0.4rpm we managed to fix it already by all of the basic tune up. eg : changed oil and fuel filter. cleaned the throttle body the sensors were cleaned as well changed the pipe of the filter to ensure no air leakage but after two days it just did this again, btw ill try and chekc it again. sir anything else we need to check? THANKS! GODBLESS
May 12, 2013 at 9:23 AM
Advertisement
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
idle air control as i suggested in the original answer. it needs to be monitored but it sounds like it is not responding to engine load

Roy
May 12, 2013 at 9:31 AM
Avatar
PAUROKISTA
  • MEMBER
  • 6 POSTS
thank you so much mr.roy

do we have to replace it or check the wiring of the iac?
originally after tune up we had a problem with the wiring being loose causing low idling. then we overcome it by some cleaning and tightening it. do you think sir it's still with the wiring of the iac? or replacement is needed? thanks!

Paul
May 12, 2013 at 9:37 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
re check the wiring connector. beyond that, there is no servicing, just replacement

Roy
May 12, 2013 at 9:45 AM
Avatar
PAUROKISTA
  • MEMBER
  • 6 POSTS
which one do we need to check sir roy, i have two pictures here. thanks for helping us sir.. were a little bit confused now :))

Paul
Image (Click to enlarge)
Attached Media
May 12, 2013 at 9:58 AM
Avatar
PAUROKISTA
  • MEMBER
  • 6 POSTS
or this one?
Image (Click to enlarge)
Attached Media
May 12, 2013 at 9:59 AM
Avatar
ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
the second one. that is the idle air. the first is the mass air flow

roy
May 12, 2013 at 10:02 AM
Avatar
PAUROKISTA
  • MEMBER
  • 6 POSTS
I see thanks Mr. Roy if ever wiring is good, then we have to replace the whole thing that is connected to the throttle body right?

(sorry if we cant post a lot of pics since we are currently at the office and it's just our part time fixing cars as of the moment :) )

Thanks.
Godbless

Paul
May 12, 2013 at 10:15 AM