What's the purpose of a Vacuum advancer?

**benchph1** · February 10th, 2004 05:51 PM

Car: AE100 Corolla XE
Engine : 2E 1300 (Carb)

Toyota Shaw recommended to replace the vacuum advancer kasi
hindi na daw gumagana? sabi namin sa next PMS na lang..tinanung din namin kung sang part ng engine sabi nila
sa ignition daw..para san ba talaga yun??
:confused:

**artpogi** · February 10th, 2004 06:24 PM

parang sa may distributor yata yan, not sure though

**benchph1** · February 11th, 2004 07:18 PM

bump :D

**ezgrand** · February 11th, 2004 07:32 PM

Vacuum advance:sa distributor yan usually my vacumm hose nakakabit. It senses engine load and mechanism advances the engine timing as needed for better power,fuel economy.

Bihira magloko yan, get a second opinion before replacing.

**ebbfolls** · February 12th, 2004 09:41 AM

The Vacuum Advancer is located attached to the side of the distributor, yung round saucer-like thing na may nakakabit na hose leading to the carburettor. It's purpose is to advance the spark timing when the accelerator is pressed, resulting in better torque at low speed/part throttle.

If you want to be sure, you can test if you really need a new advancer unit. Just unsnap the distributor cap off, remove the carburettor end of the hose, vacuum it with your mouth(not for the delicate person) and see if the plate (inside the distributor) moves every time suction is applied to the advancer. Also, try to hold the vacuum and see if the plate slowly returns by spring pressure. If it does, the advancer diaphragm is leaky and the unit needs to be replaced.

**benchph1** · February 12th, 2004 10:01 AM

Thanks for the info ebbfolls. :D

**rock n rolla** · May 9th, 2016 03:27 PM

boss ebbfolls; if i don't repair the advancer; will it damage the engine? thanks

**dr. d** · May 13th, 2016 10:56 AM

Originally Posted by rock n rolla

boss ebbfolls; if i don't repair the advancer; will it damage the engine? thanks

sir, this thread is 12 years old. and ebbfoils last showed up 11 years ago.
allow me, instead...
if the base ignition timing were adjusted correctly for idling... no, it won't hurt the engine.. but it will hurt your pride and your pocketbook.. your ignition timing will be frozen... your car won't accelerate well, and your gas bill will be more than what it should be, were that advancer working.
some people, however, advance the ignition timing, to make up for its non-functioning advancer. this might cause damage in the long run, as the ignition timing would always be advanced... from idling to high speed.
pa-ayos mo na po... hindi naman ganon ka-mahal. and surplus advancers are a-plenty.. just make sure it's not leaking.

**Romerey Miguel** · May 14th, 2016 06:42 PM

Originally Posted by dr. d

sir, this thread is 12 years old. and ebbfoils last showed up 11 years ago.
allow me, instead...
if the base ignition timing were adjusted correctly for idling... no, it won't hurt the engine.. but it will hurt your pride and your pocketbook.. your ignition timing will be frozen... your car won't accelerate well, and your gas bill will be more than what it should be, were that advancer working.
some people, however, advance the ignition timing, to make up for its non-functioning advancer. this might cause damage in the long run, as the ignition timing would always be advanced... from idling to high speed.
pa-ayos mo na po... hindi naman ganon ka-mahal. and surplus advancers are a-plenty.. just make sure it's not leaking.

Buti nabuhay ulit itong thread. May question ako. kasi kakacheck ko lang din ng mga vacuum tubes ng toyota corolla ko tapos napansin ko yung vacuum advancer walang tubes na nakakabit. Pinasa lang kasi sakin yung kotse kaya wala ako idea sa mga pinaayos na doon. Ok lang po ba ung ganung setup? And any idea kung bakit inalis yun?

**jick.cejoco** · May 14th, 2016 09:29 PM

on older cars, there are two ignition advance systems in place.
to compensate for the shortened time where the piston moves, a centrifugal advancer is used to optimize the power stroke pressures.
to compensate for an increased volume of fuel (increased engine load), a vacuum advancer is used to give ample time to completely burn the increased amount of fuel.
if the vacuum advancer is not working, it takes a delay until the engine speed catches up and uses the centrifugal advancer but the total advance (centrifugal advance for increased speed plus the vacuum advance for the wider opened throttle plate) will not be reached. fuel consumption will increase and the power output is not at optimum