Quite Possibly the Strangest Thing...HELP!
08-15-2007, 09:02 AM
#14
6th Gear Member
Join Date: Jun 2006
Location: Maine
Posts: 5,693
RE: Quite Possibly the Strangest Thing...HELP!
If you have an open vacuum line that's drawing in unmetered air, then you have a problem. You actualyl want the hose to be covered. Are you sure that uncovering it solved your problems? Plug it back up and see if the car fires up. I can't imagine that was the problem... unless for some reason you were running too rich and it needed the extra air via the leak to lean it out some. Seems unlikely though
Some people just shove a bolt in it. Other's get a rubber cap and cap it off.
Some people just shove a bolt in it. Other's get a rubber cap and cap it off.
08-15-2007, 09:59 AM
#15
Super Moderator
Join Date: Jan 2004
Location: IL
Posts: 10,637
RE: Quite Possibly the Strangest Thing...HELP!
It shouldn't be sucking in any air at all. It's there because on the SD cars, it's supposed to be plugged into the MAP sensor. The '89's had EVERYTHING there to run speed density, but at the last minute got the MAF stuff. I don't believe that hose is suppose to be plugged into anything, unless it came from under the intake. But I doubt it. If you had a vacuum leak, you'd know it.
08-15-2007, 02:22 PM
#16
1st Gear Member
Thread Starter
Join Date: Jun 2007
Location:
Posts: 120
RE: Quite Possibly the Strangest Thing...HELP!
Okay, more info...
1) it is coming from under the intake.
2) it is sucking air, lots in my opinion.
Suggestions?
I intend to start the car, ensure an idle and then block the hose to see if the car dies out. I also intend to have a thorough look of the air intake from air cleaner up to throttle plates.
Thanks.
1) it is coming from under the intake.
2) it is sucking air, lots in my opinion.
Suggestions?
I intend to start the car, ensure an idle and then block the hose to see if the car dies out. I also intend to have a thorough look of the air intake from air cleaner up to throttle plates.
Thanks.
08-15-2007, 03:11 PM
#19
2nd Gear Member
Join Date: Jul 2007
Location:
Posts: 200
RE: Quite Possibly the Strangest Thing...HELP!
It was supposed to go to that box box attached to the firewall. That boxwas used as a MAP(Manifold Air Pressure) sensor.Being that it has been converted to MAF, it is no longer needed. That box is now a BAP(Barometric Air Pressure) sensor. You should see a wiring harness into the bottom of the box as well as a inch long plastic tube. That tube should be open. Plug the hose and as is well.
Mike
Mike
08-15-2007, 06:27 PM
#20
1st Gear Member
Thread Starter
Join Date: Jun 2007
Location:
Posts: 120
RE: Quite Possibly the Strangest Thing...HELP!
This car is possessed....
Got home from work, left the car running, established good idle then put a bolt in the vacuum hose...
Idle dropped and immediately stabilized. No issues, no grumbling.
So I shut off the car and start it. Fires right up, establishes idle, no issues.
It's been sleeping for a couple of hours. I will try to start it later.
We shall see....
WTF????
Got home from work, left the car running, established good idle then put a bolt in the vacuum hose...
Idle dropped and immediately stabilized. No issues, no grumbling.
So I shut off the car and start it. Fires right up, establishes idle, no issues.
It's been sleeping for a couple of hours. I will try to start it later.
We shall see....
WTF????