Problematic acceleration immediately after heavy breaking.
alkemist
04-30-2006, 09:27 AM
Greetings,
1993 Buick Lesabre.
If I apply breaks heavily, whether or not I make a complete stop and then immediately press gas to go forward, the car often struggles for a second or two to start accelerating.
However, if I give it about 2 seconds to relax after beraking, there is no problem with acceleration.
This never happens without heavy breaking before acceleration.
I am wondering what could it be.
Thank you
1993 Buick Lesabre.
If I apply breaks heavily, whether or not I make a complete stop and then immediately press gas to go forward, the car often struggles for a second or two to start accelerating.
However, if I give it about 2 seconds to relax after beraking, there is no problem with acceleration.
This never happens without heavy breaking before acceleration.
I am wondering what could it be.
Thank you
HotZ28
04-30-2006, 12:49 PM
It sounds like fuel starvation. How much gas do you have in the tank when this happens?
alkemist
05-01-2006, 09:11 AM
Problem seems to not change with gas tank completely filled up.
There is starvation however, on right turns at less than a 1/4 of gas soemtimes.
There is starvation however, on right turns at less than a 1/4 of gas soemtimes.
alkemist
05-01-2006, 09:12 AM
Problem seems to not change with gas tank completely filled up.
There is starvation however, on right turns at less than a 1/4 of gas soemtimes.
There is starvation however, on right turns at less than a 1/4 of gas soemtimes.
HotZ28
05-01-2006, 09:32 AM
Have you changed the fuel filter lately?
maxwedge
05-01-2006, 09:33 AM
Problem seems to not change with gas tank completely filled up.
There is starvation however, on right turns at less than a 1/4 of gas soemtimes.
Get a fuel pressure gage on it, tape it to the w/s and observe the fp when this occurs.
There is starvation however, on right turns at less than a 1/4 of gas soemtimes.
Get a fuel pressure gage on it, tape it to the w/s and observe the fp when this occurs.
alkemist
05-02-2006, 08:38 AM
Get a fuel pressure gage on it, tape it to the w/s and observe the fp when this occurs.
I dont understand where I should tape the fuel pressure gage :) sry
Id like to mention I have Actron OBDII reader scanner. Maybe it might help to diagnose in any way?
I dont understand where I should tape the fuel pressure gage :) sry
Id like to mention I have Actron OBDII reader scanner. Maybe it might help to diagnose in any way?
maxwedge
05-02-2006, 03:10 PM
I dont understand where I should tape the fuel pressure gage :) sry
Id like to mention I have Actron OBDII reader scanner. Maybe it might help to diagnose in any way?
To the windshield to see the gage when driving.
Id like to mention I have Actron OBDII reader scanner. Maybe it might help to diagnose in any way?
To the windshield to see the gage when driving.
Alibi
05-02-2006, 05:25 PM
I vote clogged fuel filter or faulty fuel pressure regulator, or possibly a dying fuel pump.
gbeeley
05-03-2006, 09:44 PM
If I apply breaks heavily, whether or not I make a complete stop and then immediately press gas to go forward, the car often struggles for a second or two to start accelerating.
You might check for a power brake booster vacuum leak:
1 - run vehicle for a short bit.
2 - with foot off brake pedal, turn off engine and wait a few seconds.
3 - push firmly down on brake pedal. You should hear a momentary hiss as the power assist kicks in. Hold it there for a bit.
4 - release brake pedal.
5 - push down brake pedal again, firmly. You should hear the momentary power assist hiss again.
6 - repeat the process. You should get two to three full pushes of the brake pedal before the power assist runs out.
- GB
You might check for a power brake booster vacuum leak:
1 - run vehicle for a short bit.
2 - with foot off brake pedal, turn off engine and wait a few seconds.
3 - push firmly down on brake pedal. You should hear a momentary hiss as the power assist kicks in. Hold it there for a bit.
4 - release brake pedal.
5 - push down brake pedal again, firmly. You should hear the momentary power assist hiss again.
6 - repeat the process. You should get two to three full pushes of the brake pedal before the power assist runs out.
- GB
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