A stock 12A should have a idle vacuum of...

Reply Subscribe

Thread Tools

Search this Thread

Sep 9, 2007 | 02:01 AM

Richard Miller

Thread Starter

Damn, it did start!

Joined: Feb 2001

Posts: 2,771

Likes: 470

From: washington

A stock 12A should have a idle vacuum of...

what? I got around 10 in Hg with a five degree deflection. both ways. Should the vacuum be steady?

thank you

Sep 9, 2007 | 08:20 AM

REVHED

Hunting Skylines

Joined: Apr 2001

Posts: 3,431

Likes: 4

From: Brisbane, Queensland, Australia.

That's pretty low.

Sep 9, 2007 | 11:46 AM

j9fd3s

Moderator

iTrader: (3)

Joined: Mar 2001

Posts: 31,837

Likes: 3,233

From: https://www2.mazda.com/en/100th/

it may make a difference where you put the vacuum line. i did some testing, with the vacuum guage teed into the distributor vacuum lines.

i was seeing 15ish, steady.

Sep 9, 2007 | 01:02 PM

Richard Miller

Thread Starter

Damn, it did start!

Joined: Feb 2001

Posts: 2,771

Likes: 470

From: washington

so is off the dizzy vac lines an accepted place? and what does low vacuum mean. other than a leak.

Sep 9, 2007 | 01:21 PM

Jeff20B

Lapping = Fapping

iTrader: (13)

Joined: Aug 2001

Posts: 15,725

Likes: 91

From: Near Seattle

It could mean weak springs or worn seals. Maybe chrome flaking.

Reply Subscribe

Related Topics

Thread

Thread Starter

Forum

Replies

Last Post

Installed UIM gasket, now my engine won't run

trickster

2nd Generation Specific (1986-1992)

Jul 1, 2023 04:40 PM

S4 low idle problem

86glxNA

New Member RX-7 Technical

Aug 22, 2015 08:54 PM

Vacuum testing with smoke?

pzr2

General Rotary Tech Support

Aug 15, 2015 08:29 PM