Question about 1999 GMC Sierra

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Engine stalls When i step no the brake the engine will stall or run very eretic

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You must have a cracked broken or loose vacuum line somewhere. Look under the hood with the engine running and listen for hissing. A stethoscope or a length of fuel line held to your ear will help. Wiggle the hoses around while you're looking.

Posted on May 08, 2009

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2 Answers

What makes my 2007 Isuzu turn off when I come to a stop


if it is petrol and you have your foot on the brake do a simple test first of stopping with the hand brake and if it keeps idling the replace the brake booster
next is to run the fault codes

Jul 09, 2015 | Isuzu Cars & Trucks

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92 ACCORD what causes the gauges to quit working when the brake pedal is depressed, another problem is turning on the headlights and the engine dies any answer's ?


Hi Christopher:
I'd be checking to make sure that the grounds are nice and clean and working properly. When you step on the brake pedal you are activating a switch that sends power to the brake lights. The brake lights share bulbs with the signals and emergency flashers, so it is also possible that a dead short in any of those components could "steal" the power from the ignition.
At this point, it's a trouble shoot game for you to figure out what is working, and what is not.
That's part of the fun. Enjoy.

Apr 01, 2015 | 1992 Honda Accord

1 Answer

Stalling troubleshooting


run fault codes to check for electronic problems (TCM). If this problem only happens when the foot brakes are applied check for brake booster vacuum problem. Remove vacuum line and blank off and apply the brakes to see if the engine stalls at idle.

Jul 22, 2014 | Ford F-150 Cars & Trucks

1 Answer

Abs light is on and brakes keep getting tighter


bad brakes. (do explain tighter?) (to a blind, no leg man)
first fix bad brakes, then worry ABS. last
explain tighter.
in driving school , they teach , how to drive (safely) with a stalled engine
as the engine stalls. and vacuum hits zero, the booster slowly
dies and bingo , old fashion , manual brakes. (stalls are like that)
is that what is happening. engine stalls?, or the booster is failing?
what happens there is brakes are 100 ok, but just harder to press
the pedal so you press harder and brakes are ALL THERE.
the is all by DESIGN.. no accident (no pun)
see if you have any other bad brakes symptoms.
like these.
http://www.fixkick.com/brakes/brakes.html#DoNotDrive

if brakes are 100% ok then , run the ABS scan or diagnostic
stated in the FSM , see what code you are getting.
then post that. ABS can not function correctly with bad brakes.

Feb 13, 2014 | 1993 Acura Legend

1 Answer

Stalls at stop light and rush hour traffic


disconnect the vacuum line to the brake booster and plug off to the engine. run the engine and apply the brakes and see if it still cuts out. If not the reattach the vacuum hose and re apply the brakes . If there is a stall then replace the brake booster as there is a fault in it that is allowing air into the manifold on brake application. This problem is not connected to the CPU by sensor so no faults would be recorded.

Dec 22, 2013 | 2008 Chevrolet Impala

2 Answers

Transmission


A/T or M/T (auto or stick ,we dont know)
n moving in drive, reverse or Low or 1? or 2? (me too lazy to look what tranny you have)
it can be 2 things
1: lack of engine power
2: bad clutch or transmission

who do we tell? easy
you step on gas , RPM goes way high and MPH dont. (slips)
tranny slip.
you step on gas, RPM tracks with MPH, good ,
you then do the 5second max. tranny stall test in every car FSM made. and see the stall speed, with brakes hard set.
too high is tranny slip
way to low, engine power POOR.

alldata.com has all this on tranny. stall speed.
the FSM turn to on car A/T service, see STALL test.
bingo.
or youtube the vast number of videos on topic, stall.


wont move at all ,can be :
brake drag (passes stall test)
but first , the tests are, for bad engine or trans,
pick the one it is , state so, and we can go much farther.

Nov 26, 2013 | 1992 Honda Accord

1 Answer

Stalls when turn lights on or hit brakes


Check the plugs to make sure they aren't fouled. Then maybe the fuel pump. If it dies when you hit the brakes, that's electrical. I'd say it's the fuel pump, filter, etc.
When plugs are fouled, it probably wouldn't want to start, and brakes aren't electrical and the fuel pump isn't real likely either.
Actually when you step on the brakes, it takes power from the battery or alternator to run the pump for the master cylinder on the brakes. (not true)
Doing so will cause your car to stall if the idle is too low. Turn the idle up and see if it happens again.
Same thing with the in gear driving. Putting the car in gear will drop the rpm to half or less than what it is already.
The brakes have no pump. If they are power brakes, then it has a booster (and the booster uses engine vacuum, not electrical power) you can't adjust the idle speed in a FIed car. When you put the car in gear, the rpm should stay steady since the FI system should adjust for loads on the engine (turning the a/c on, putting car in gear, turning on lights etc) Do a tune up and go from there. By the sounds of it though, this is a lock-up torque convertor problem. The convertor lock is stuck on so the torque convertor is "solid" when you put it in gear.
If it is not an engine problem, it should be a problem with the transmission. When the gearshift is in drive, in this case, the gears get jammed with each other, causing the whole engine/drivetrain to lock up, stalling the engine. You should get a repair as soon as possible.
Either your power brake assist booster has a bad check valve in it causing a huge vacuum leak when you step on the brake (Vacuum leaks lean out the fuel/air mixture causing stalling) or you have an 'engine protect' sensor that kills the ignition/fuel pump when the oil level's too low and it's either got crud in it from running the oil too low or has otherwise malfunctioned

Dec 31, 2011 | 1988 Chevrolet C1500

1 Answer

I have a 96 Tahoe and when i press the brake pedal i hear a hissing sound by the pedal and engine sometimes stalls, what could the problem be ?


That sounds like a brake booster problem. The brake booster runs on engine vacuum to help make the brake pedal easier to push and easier to stop the tahoe. When a booster develops an internal leak, you can hear the vacuum escaping through the leak when you step on the brake. The engine stalls because the vacuum leak in the brake booster also causes a large vacuum leak for the engine.

To verify that this is actually the problem, go outside the vehicle with the hood open. Find the large brake fluid reservoir attached to a large round metal black (usually) canister on the driver's side of the firewall. (back of the engine compartment.) There is a large black rubber hose pushed into the top of the black canister, which is the vacuum line attached to the brake booster. Pull the rubber hose out of the grommet on the booster and stick your finger over the hose. Have someone start the tahoe. You will feel a considerable amount of vacuum pulling at your finger, and if you take your finger off the hose, the engine will stall. Also have someone step on the brakes while your finger is over the vacuum hose. If the noise is gone then you know the problem is in the brake booster.
Don't forget to re-attach the vacuum line to the brake booster. Failure to do this will result in the engine running very rough (if at all) and the brakes will require excessive effort to try to stop the tahoe.

Aug 05, 2011 | 1996 Chevrolet Tahoe

1 Answer

Car stalls when I step on the brake


There is a plastic valve going to the brake booster. That part or the brake booster itself can be the cause of your stalling. You are venting too much vacuum and killing the engine.

Nov 16, 2009 | 1997 Mercury Sable

3 Answers

Jeep stalls



I had the same problem... frustrating.

I picked up a repair manual at the parts store. I took off the throttle body and cleaned it with throttle body cleaner spray. I changed the Idle Air Control Valve (idle speed motor) which was very clogged. While I had the throttle body off I also changed the Map Sensor and Throttle Position Sensor. The manual will walk you through the steps. I had never done anything like this before. If I can do you so can you.
My Jeep has never run better. Good Luck

Sep 26, 2008 | 1991 Jeep Comanche

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