Lose a/c when accelerating

Reply Subscribe

Thread Tools

Search this Thread

Aug 12, 2005 | 12:33 PM

#16

Broncobudy

Thread Starter

Senior User

Joined: Oct 2004

Posts: 188

Likes: 0

Quote:

Originally Posted by b4hntn

Now my A/C never quits (unless I turn it off) no matter how I drive so if it has some sort of cut out switch at full throttle or high rpm it is not working on my '94 5.8 Bronco. I get comfortable in Texas August. See my other posts if you missed the details.

Even though I did the vacuum test and wound up replacing the reservoir cannister, my a/c still cuts off at wot or high rpm's. Go figure.

Aug 12, 2005 | 12:48 PM

#17

b4hntn

Posting Guru

Joined: Apr 2005

Posts: 2,018

Likes: 0

From: Longview, TX

Yes, with the vacuum tester I fixed all the leaks. If you have no leaks hook the guage to the A/C controls side of the little mushroom shaped check valve. Start engine, hold brakes firmly, put in gear and apply load to engine slowly . Watch vacuum guage. If the little check valve is OK the vacuum will not drop off. Mine dropped to almost zero at heavy throttle like the engine.. Got new one at dealership for about $11 and waaa laaa!!!!! A/C vacuum lines stays high and keeps blowing nice cold air.

Aug 25, 2005 | 04:39 PM

#18

Broncobudy

Thread Starter

Senior User

Joined: Oct 2004

Posts: 188

Likes: 0

Quote:

Originally Posted by b4hntn

The very same problem got me hooked on FTE. Look under the hood over by the passenger side fender. Two "spaghetti hoses" vacuum lines emerge from the wiring harness. The white one seems to get britttle and have cracks sooner than the black but mine was a black rubbing on a ground strap and the little check valve assy. was bad. There have been many threads on the subject. To see how I fixed mine click on my name and see my posts. By getting an inexpensive vacuum tester I found four vacuum problems so far and my 5.8 runs great now and A/C always freezes my fanny no matter where, when or how I drive.

Vacuum leak no mas....spent a total of $11.65 for this check valve and spent a total of 12 seconds to install, and presto, no fading a/c under acceleration. Drives better. That made for a total of 3 vacuum leaks that I came across. Thanks.

Aug 25, 2005 | 05:59 PM

#19

b4hntn

Posting Guru

Joined: Apr 2005

Posts: 2,018

Likes: 0

From: Longview, TX

No mas cookarachas, no mas rattas no mas vac leak... Successes sure are fun. I'm glad you got A/C working correctly.

Sep 6, 2005 | 01:56 PM

#20

broncoman

Freshman User

Joined: Oct 2000

Posts: 49

Likes: 0

Yep, finally repalced the air. cond. check valve and had a chance to test this weekend and voila, no more air conditioning redirecting under heavy load.

I starting to cringe having to find a leaking vacuum line somewhere. Nice cheap $12 cdn fix

Sep 6, 2005 | 05:59 PM

#21

Streetgang

Elder User

Joined: Feb 2005

Posts: 693

Likes: 0

From: Hoboken, NJ...

Quote:

Originally Posted by Broncobudy

Ok, it's been awhile, but that is how it is sometimes. I did exactly like b4hntn said about getting the vacuum checkerat A-Z for $30. Found that all of my vacuum hoses and check valves were in good shape. Did find that the back-up vacuum canister for the cruise control/egr circulation was not holding. Costs like $35 to replace. Was just thinking how much money I saved my doing it myself and getting the part myself versus letting some garage ape violate me at checkout.

Just a suggestion......with the money saved you could think about becoming a
FTE Member by making a one time yearly donation. I am quite sure you will be saving much more money in the future, as I have......so what the hell???