Question about Cars & Trucks
I have a 98 chevy tahoe 4x4 and i just had a brake booster replaced and about a week and a half after that i noticed my cruise control wasnt working and when i get up to about 40mph the speed hand starts jumping up and down and the truck will lurch like its jumping in or out of gear. could the booster replacement being replaced cause any of this
Cruise control might be disconnected--bring back and have company check the connections and wiring -- if any problem with brake system no cruise will not work --also if booster has a problem like vacuum leak will cause problems like running rough and shifting
Posted on May 03, 2020
Testimonial: "im taking it back in the morning because i had no problems until then thank you for the help"
Certainly there is a connection between the brake and the cruise control as applying the footbrake would cancel or pause the cruise control. I am not sure about the speedo though.
Your description suggests there is something deeper going on due to the lurching and you should take the vehicle back to the repairer that replaced the booster and complain bitterly.
Posted on May 03, 2020
Testimonial: "im returnng to the mechanic in the morning because i wasnt having any problems until they replaced the booster thank you for your help"
Check the Speed Sensor wires on top of the rear differentual just above the connector. The brake cable tends to rub against those wires and can wear through the insulation causing the an improper signal to be sent from the sensor. If this appears to be the problem, I have found other posts that say to get a 2 pin replacement connector ($22) from the dealer and solder new connector in place. Insulate well and zip tie up the brake cable to prevent future problems.
Posted on Aug 19, 2008
You might have a bad brake light switch located at the top of the brake pedal, there's also a cruise control switch mounted next to the brake light switch.
Posted on Apr 09, 2009
Run the car fo a while. Turn it off and wait about 30 seconds. Pull the hose off the booster. You will hear a loud rush of air entering the booster to fill the void. If not the booster is leaking. It will also cause all sorts of idle and off-idle acceleration problems. Did you check the hose from the engine to the booster? Was there a chack valve in the line too?
Posted on Feb 06, 2010
you may have over looked the vacuum line for the cruise control that hooks up to or close to brake booster hope this helps you out..sincerely D.Jones
Posted on Jun 06, 2010
You need to bleed the brakes. Look at the brake assembly there should be a little nub with a bolt at the base of it. It takes two people to bleed a brake and you only do them one at a time. Have someone sit in the truck and when you loosen the bleeder nut (little nub with the bolt) have the other person push the brake pedal to the floor. Repeat until no more air bubbles come out. Do this to all of the brakes individually. It is safe to reuse the fluid. Don't let the brake fluid level fall to low or more air will be sucked into the lines.
Posted on Jun 28, 2010
Tips for a great answer:
Usually answered in minutes!