• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Vacuum Problem?


Caymen Ranger

New Member
Joined
Mar 13, 2011
Messages
2
Reaction score
0
Points
0
Vehicle Year
1996
Make / Model
Ford
Transmission
Manual
I've lurked for years, though never had any problems worthy of you guys. Hopefully you can help...

My vehicle had been running rough for a while. I finally got around to checking it out and replaced two vacuum hoses. Now, it is very difficult to start the vehicle (it'll turn over for a while, though it doesn't want to start). When it finally does start, it stumbles very hard, though it quickly levels out and runs nicely. It does feel easy to stall, meaning I have to give it more gas than usual to move it around my driveway.

Today, I turned the heat on and the engine stumbled. I started thinking about the vacuum system and decided to pumped the brakes. Pumping them caused the engine to nosedive and stall almost immediately. Any ideas?
 


BRUTUS_T_HOG

New Member
Article Contributor
ASE Certified Tech
TRS Banner 2010-2011
Joined
Aug 26, 2008
Messages
2,222
Reaction score
36
Points
0
Location
Rainier, OR
Vehicle Year
89
Make / Model
Ford
Engine Size
2.3L
Transmission
Manual
try to plug off the large hose going to the brake booster. do you hear any hissing in the cab? do the brakes feel abnormally hard to press?

i usually take the check valve out and reverse it in the hose to block off the hose
 

Caymen Ranger

New Member
Joined
Mar 13, 2011
Messages
2
Reaction score
0
Points
0
Vehicle Year
1996
Make / Model
Ford
Transmission
Manual
As a matter of fact, the brakes are much harder to push in. With constant pressure applied, they do slowly "press in", however I'm not sure what effect his has on my actual braking power as I wasn't moving while doing this.

I'll go give the hissing a shot from the cab, however I can certainly hear a hissing/bearings noise coming from the power steering pump. They're not related, though it might be masking the other noise (if there is one).
 

Mark_88

Well-Known Member
Joined
Aug 11, 2007
Messages
18,554
Reaction score
240
Points
63
Age
68
Location
Ontario, Canada
Vehicle Year
2007
Make / Model
Dordge
Engine Size
3.3 Fuel Injected
Transmission
Automatic
My credo
Love Thy Neighbor
If the brakes are hard then you may have a vacuum leak..which could cause the no start if it is large enough...you could try a vacuum tester on it...they're fairly inexpensive...

But, just to save you going out to buy one, check the PCV cannister under the intake...make sure it is not loose and that the hoses are connected...your truck may start with this disconnected, but it won't run right or idle properly and will probably die...

Not starting at all could be something else...like fuel pressure, spark, timing, and others...
 

Sponsored Ad


Sponsored Ad

Staff online

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Kirby N.
March Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top