1995 Saturn SL1

LADAGE22

MEMBER
1995 SATURN SL1
4 CYL
2WD
AUTOMATIC
85,000 MILES

I have a 1995 saturn sl1 and I just did a head job on it and it went great car runs good. But when I turn on my air conditioner its works fine until I put the car in gear and then it starts kocking until I give the car some gas and then it gos away until I stop. Why would this happien. Thanks james

Friday, July 30th, 2010 AT 7:50 PM

6 Replies

SATURNTECH9

MECHANIC
30,869 POSTS

What's knocking the A/c compressor or the engine?

Was this

answer

helpful?

Yes

Friday, July 30th, 2010 AT 7:58 PM

LADAGE22

MEMBER
5 POSTS

I dontknow I think its the engine could it be the comperssor

Was this

answer

helpful?

Yes

Friday, July 30th, 2010 AT 8:44 PM

LADAGE22

MEMBER
5 POSTS

I dont know I think is the engine the ideling speed drops from 700 rpm to 500 rpms when I put the car in drive

Was this

answer

helpful?

Yes

Friday, July 30th, 2010 AT 8:46 PM

SATURNTECH9

MECHANIC
30,869 POSTS

So if the a/c isn't on does it knock in gear?Also can you hear any squealing noise like the belt squealing when you hear the knocking and hit the gas and it goes away?

Was this

answer

helpful?

Yes

Friday, July 30th, 2010 AT 9:50 PM

LADAGE22

MEMBER
5 POSTS

The belt is new and its like a knock from the engine or
transaxle. No if the ac is not on it does not make the nosie in gear.

Was this

answer

helpful?

Yes

Friday, July 30th, 2010 AT 10:37 PM

SATURNTECH9

MECHANIC
30,869 POSTS

Your going to have to be under the hood and listen for the knocking noise while someone start's the car and put's it in gear with the a/c on. It sound's like it's the belt tenisor or the a/c compressor knocking.

Was this

answer

helpful?

Yes

Saturday, July 31st, 2010 AT 7:55 PM