Question about 2002 Saab 9-3

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No start after replacing brake booster

It seems to have no injector pulse

Posted by dpkoehler200 on

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shawn feather

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Check for a vaccum leak if you need to take a spray bottel with soapy water and spary around the brake booster or you can use brake clean spray

Posted on Sep 20, 2012

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My 2003 jaguar s stype v8 started to shake from the engine while parked and stopped at a red light and my check engine light starts blinking and restricted performance light comes on


run the fault codes to look for injector problems
check injectors for bad tips
check fuel pressure to injectors
check for vacuum leaks with the foot on the brake ( booster leaks --check by applying the hand brake with the foot off the brake and if the problem is not there it is the brake booster faulty)

Sep 23, 2015 | Jaguar Cars & Trucks

1 Answer

My Mazda lantis does not start .I put some gasoline in the brake booster line and it will start and rev as normal but when I leave it for about 2 hours it will not start someone please tell me why?


if you are putting fuel in the brake booster vacuum line then the problem is that there is no fuel being supplied to the injectors or the injectors are not being activated by the ECM
Get the fault codes read before sometjing like a backfire blows the booster off the car

Apr 08, 2015 | Mazda Cars & Trucks

1 Answer

My kia magentis 2007 crdi on tick over if I push my brake pedal down I get a pulsating coming thru the pedal


Not sure what you mean by tick over but pulse through pedal is usually from ABS / stability system. If you mean you feel this when first starting up vehicle it is probably system doing self test. They do self test at start but usually you don't feel it that much. May be nothing - especially if no light coming on. Only other pulse you may feel is if power brake booster is failing. If you are driving and brakes feel hard to push at times then I would suspect the brake booster for that.

Jan 17, 2015 | Kia Cars & Trucks

1 Answer

Ok. I've replaced the brake booster and it seemed to fix my surging problem when I hit the brake instantly. Until I got about 20 miles up the road and now its back, but not nearly as bad.My newest...


Brake booster have to be adjusted when installed. There should be a specification sheet on it. Or consult Chiltons. The starting issue sounds like a vacuum leak and since brake boosters work on vacuum, you should check all the lines and hoses.

Dec 27, 2014 | 1994 Toyota Pickup

1 Answer

Car dies when going over really bumpy roads


If the brake pedal goes hard right BEFORE the car dies, and not after, then you could have a problem INSIDE the brake power booster. try to verify this next time it dies at a stop, if you can safely pull the dead car off the road into a driveway (or try to make it stall in a bumpy parking lot) - then before you try to restart the car, open the hood, pull off the rubber hose where it's plugged into the brake power booster --> you SHOULD hear a big "Swoosh" of air being sucked into the booster because there's supposed to be a strong vacuum there even after the car stops running. if you get nothing there, your car is dying of an excessive vacuum leak through the brake booster.= bad booster.

Aug 10, 2012 | 1992 Buick Century

1 Answer

1999 vw beetle will not start. Engine tries to start but the moment it fire up, it dies. Doesnt seem to be getting enough fuel, but fuel pump is delivering. Seems injectors are not working. Wha


It is called pulse. Lack of pulse to the injectors is a wiring problem or a Powertrain control module problem. You should have 12 volts to one side of each injector with key turned to run, do you?

Jun 12, 2012 | 1998 Volkswagen Beetle

2 Answers

Brake problem.


bleed the brakes again starting form the longest line back to the shortest
if you have been getting a pulsing feeling at the pedal under normal brakes you have warped rotors that need replacing or machining
under normal brakes the abs is not effective and it is only under sever brakes that you will experience the pulsations at the pedal

May 15, 2017 | 2005 GMC Envoy

1 Answer

1993 s10 2.8 tbi the fuel pump fails to pressurize when the key is tunred on, and i have to fuel injector pulse. when a jumper wire is attached i can pressurize the pump but i still have no injector pulse.


There needs to be 60 PSI of fuel pressure in the system to have the fuel injectors to work. There is also a fuel pump relay on the fire wall just left to the brake booster, There is two relays there, i just can not remember which relay is which but try switching the relays with one another. Also check the fuses to the fuel pump and ECM, and the fuel pressure from the shredder valve. Good luck and keep me posted, not a bad Idea to also replace the fuel filter, and that is located at the inside frame rail under the drivers side.

Jun 03, 2009 | 1991 Chevrolet S-10

1 Answer

Abs sensor


No, the pulsing is caused by warped rotors. Look at the inside part of each wheel to see if you're loosing brake fluid. If everything is dry, try bleeding the brakes and check you brake fluid level. If it still does it, remove the vacuum hose from the engine that goes to the brake booster and plug it. The pedal should be very solid. If it bleeds off still, replace the brake booster.

Aug 30, 2008 | 1998 GMC Sierra

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