Vvehicle surges forward when applying brakes?
Stormin-Norman I have a 2003 Windstar SE that sometimes when I apply the brake the fomite wants to accelerate, it did it twice yesterday, once in a park lot & the other time driving slow through township. I did some research this dawn on the internet & found several people complaining that the brake pedal & the flatulence bicycle were to close together and that it may be possible to by chance press the accelerator bicycle while applying the brake. I do n’t think this is what is happening but it may be. I just wondered if anyone had any input signal on this. I wear a size 12 Xtra across-the-board horseshoe and have never had this on any early vehicle.
It is possible that there is a problem with the brake booster causing an increase in RPM when applying the brake ?
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12Ounce … ..It is possible that there is a problem with the brake booster causing an increase in RPM when applying the brake ? ….
Yes, a leaky booster can cause the symptoms you describe. As the accelerator plate is closed, limiting intake air … a sudden rush of vent from a leaky booster can cause a brief rev-up .
I was NOT able to locate the world power brake promoter check valve in the aftermarket for my ’96.
You may have to go to the trader for it.
It was included with the might brake booster units … ..but you do not want to replace the solid thing for this little, easy to replace depart.
Another potential lawsuit is a sticking Idle Air Control ( IAC ) valve.
When you move your foot over to press the brake, the computer takes over the dead focal ratio by opening the IAC to keep the engine from stalling.
Stalling is the MOST park bankruptcy under this circumstance as the IAC sticks and does not open firm adequate.
however, it is potential for it to stick in the other management … ..causing a idle speed “ overshoot ”.
This is not a common thing, but is potential.
Cleaning the IAC would be something that I would put on the list.
The trouble can be made worse by the fact that the transmission is downshifting.
A stay Torque Converter solenoid can cause this.
Solenoid being a fluid valve that the calculator activates … .electrical signal to open/close it causing fluent menstruate that engages or disengages the torsion converter.
In this case, you get a boost of power because the transmission is engaging when you do n’t want it to.
This “ should ” cause the O/D idle to flash or the Check Engine Light ( CEL ) to light ( and stay lighted ) when it happens … ..storing a code that tells you that this is what happened .
Solenoid being a fluid valve that the calculator activates … .electrical signal to open/close it causing fluid flow that engages or disengages the torsion converter.
In this case, you get a boost of baron because the transmission is engaging when you do n’t want it to.
This “ should ” cause the O/D light to flash or the Check Engine Light ( CEL ) to light ( and stay lighted ) when it happens … ..storing a code that tells you that this is what happened.
This happens to me in combination with the rocky idle I always experience when the engine is cold. But the O/D clean is lone flashing when it ‘s winter otherwise it does n’t but the vanguard still “ hiccups ” and wants to leap forward when stopped in Drive with brakes applied. This does not happen once the locomotive is warm though. actually the grating idle lone begins once idle travel rapidly transitions from high to humble, but stops once locomotive has reached normal manoeuver temp. I ‘ve been meaning to troubleshoot this but the van being 12 years old it has other, more urge issues that require my attention. It is quite annoying still .
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