PerformanceTrucks.net Forums
Page 1 of 2
1
2
Show 40 post(s) from this thread on one page

PerformanceTrucks.net Forums (https://www.performancetrucks.net/forums/)
-   GM Engine & Exhaust Performance (https://www.performancetrucks.net/forums/gm-engine-exhaust-performance-21/)
-   -   Wierd vibration from brake pedal with cam.. (https://www.performancetrucks.net/forums/gm-engine-exhaust-performance-21/wierd-vibration-brake-pedal-cam-413492/)

03GMC Mar 9, 2008 11:42 AM
Wierd vibration from brake pedal with cam..
 
Just had my 215/220 cam installed last night. Everything seems great and it lopes pretty hard with the 112 lsa. Only thing is the vibration from my brake pedal while at a stop. Feels like the brake booster or something? Its not tuned yet for the cam and I'll be getting a stall put in shortly.

06sierra5.3 Mar 9, 2008 12:18 PM
put the converter in it, then tune, should be alright.

sbw9056 Mar 9, 2008 12:25 PM
Originally Posted by 03GMC (Post 3868836)
Just had my 215/220 cam installed last night. Everything seems great and it lopes pretty hard with the 112 lsa. Only thing is the vibration from my brake pedal while at a stop. Feels like the brake booster or something? Its not tuned yet for the cam and I'll be getting a stall put in shortly.
Decreased vacuum to the brake booster.

03GMC Mar 9, 2008 12:40 PM
So tuning can increase the vacuum to the brake booster?

BlownChevy Mar 9, 2008 01:45 PM
Originally Posted by 03GMC (Post 3868890)
So tuning can increase the vacuum to the brake booster?
negative. How much vacuum do you have a idle?

03GMC Mar 9, 2008 01:47 PM
Originally Posted by BlownChevy (Post 3868934)
negative. How much vacuum do you have a idle?
No idea. How do I figure that out? Has something to do with the cam. It was fine, I put a cam in it and now it does this. :bang:

sbw9056 Mar 9, 2008 02:40 PM
Have it tuned. Increase your idle speed. Get a higher stall converter.

BlownChevy Mar 9, 2008 05:28 PM
Originally Posted by sbw9056 (Post 3868974)
Have it tuned. Increase your idle speed. Get a higher stall converter.
all three are things that are NOT going to change his problem.

1SlowHoe Mar 9, 2008 05:33 PM
Whats the overlap on that cam? A 112lsa doesnt usualy cause this issue.

Nick™ Mar 9, 2008 05:43 PM
Originally Posted by BlownChevy (Post 3869082)
all three are things that are NOT going to change his problem.
somewhat true. The 2003 trucks have a vacuum pump on the brake booster that should compensate. Under other circumstances the vacuum can reduce the power of the brake booster.

can we get more description of the "vibration", is it while stopping, sitting at idle, does it change with the lope/ surge of the motor?


All times are GMT -5. The time now is 05:22 PM.
Page 1 of 2
1
2
Show 40 post(s) from this thread on one page


© 2026 MH Sub I, LLC dba Internet Brands