|
|
|
|
| Author |
|
|
Registered
|
Not getting any vac at the T in the engine compartment
So I’m in the middle of some winter maintenance and doing a bunch of while you’re in there stuff. I have my injectors and fuel rails off and the air box and AFM off. The holes for the injectors are plugged up with rubber stoppers and the oil cap is on.
But when I hook up a little vac pump to the little T junction in the back I get nada. Just want to make sure I’m not overlooking something obvious.
__________________
1986 Carrera Coupe - 1987 W124 300E - 1999 Land Cruiser 100 - 2021 GLA250 |
||
03-01-2020, 01:11 PM
|
|
|
Registered
Join Date: Jun 2009
Posts: 1,244
|
Get a vac/intake schematic so that you can get an idea of what should show vac and when. Without starting info, you may be chasing a ghost
|
||
|
03-02-2020, 05:38 AM
|
|
|
Registered
Join Date: Oct 2006
Location: MYR S.C.
Posts: 17,321
|
are you trying to pull a vacuum through the manifold and into the cylinder heads?
if so, I don't think it would work. you would have to set the crank to somewhere around maybe 90 ATDC. (30 BTDC should be the same) so the intake valves are closed. maybe a little more. I don't have the opening and closing numbers in front of me
__________________
86 930 94kmiles [_  _] RUNNING:[__] NOT RUNNING: ____77 911S widebody: SOLD88 BMW 325is 200K+ SOLD 03 BMW 330CI 220K:: [_ _] RUNNING: [__] NOT RUNNING:01 suburban 330K:: [_ _] RUNNING: [__] NOT RUNNING:RACE CAR:: sold |
||
|
03-02-2020, 06:41 AM
|
|
|
Schleprock
Join Date: Sep 2000
Location: Frankfort IL USA
Posts: 16,639
|
Which T are you working on? There's one that connects the vac ports on the fuel pressure regulator and the damper. There's another that is the vacuum source for the speed control where it taps into the brake booster venturi hose.
__________________
Kevin L '86 Carrera "Larry" |
||
|
03-02-2020, 11:36 AM
|
|
 |
| Thread Tools | |
| Rate This Thread | |
|
|
Carrera
