Why does my car stall at high speed?

The engine can stall at high speed, at low speed, or even at idle. A faulty throttle position sensor will not let your car accelerate normally. Though this doesn’t happen all the time. You may experience slow acceleration, acceleration surge at both high and low speeds, hesitation or delay in acceleration, and other related symptoms.

Can a bad idle control valve cause stalling?

3. Engine stalling The idle control valve, also commonly referred to as the idle air control valve, is an engine management component that is found in one form or another on the majority of road going vehicles.

What is the diagnostic code for engine stall?

Diagnostic trouble codes P0120, P0121, P0122, P0123, and P0124 are what will commonly appear. The engine can stall for no reason and without any warning. This happens when the TPS gives incorrect information to the ECM. The engine can stall at high speed, at low speed, or even at idle.

What makes a car stall with a vacuum leak?

Misfiring or hesitation during acceleration is another common issue with vacuum leaks. As the leak gets worse, the car will begin to stall. A hissing sound and an illuminated “Check Engine” light will typically also be observed.

How many miles does a 1997 Corvette have?

My 1997 coupe auto,loaded 46,000 orig miles ,but dual mode a/c comes on randomly once on can be set to temp,all modes then just loses power shuts off. … Car has only 40k miles, very nice condition, not hot rodded. All has been fine, suddenly one morning when first started, it shifts from 2nd to like … Cruise control not working.

Why does my C5 Corvette not start hot?

c5 won’t start hot unless the key is cycled between off and on three times, then it will run fine. fuel pressure regulator has been changed as well as … The headlight doors on my C5 corvette wont close with the engine turned off. Is this normal?

What did my 1999 C5 Corvette die of?

1999 C5 corvette died after starting 3 times after I put it in gear. The I started it and revved it up a few times and it drove fine for about 5 miles. … When i put key in to start my C5 vette gages go crazy lights flash security light goes on car turns over but then shuts off .

Why does my 2002 corvette stay in neutral?

Just bought a 2002 coupe and noticed that the passenger tempeture control knob doesn’t change the temperature display when you turn the knob up or down. … Pulled corvette into garage-activated trunk release-corvette stays in neutral when i try to shift-will not work in drive or reverse-closed trunk;still …

Can a car stall with a bad throttle position sensor?

The engine can stall for no reason and without any warning. This happens when the TPS gives incorrect information to the ECM. The engine can stall at high speed, at low speed, or even at idle. A faulty throttle position sensor will not let your car accelerate normally. Though this doesn’t happen all the time.

What are the signs of a failing TPS?

2. Engine won’t idle smoothly, idles too slowly, or stalls. If you start to experience engine misfires, stalling, or rough idling when the car is stopped, it can also be a warning sign of a failing TPS.

What do you need to know about replacing TPS?

Replacing the TPS will include clearing relevant fault codes, and may require software reprogramming of the new TPS module to match other engine management software. This is all best left to a professional mechanic who can provide you with a diagnosis, and then install the correct replacement part.

Can a failing TPS cause a car to stall?

It can be difficult to tell the difference between a failing TPS and a malfunctioning or clogged idle air control (IAC) valve, so electrical testing and cleaning of the IAC is recommended. As mentioned, a failing TPS can result in random engine stalling at idle, but this can also happen under driving conditions.

When does a car stall at low rpm?

The RPM goes to 0 and the engine shuts off. This only happens when travelling at low speeds (e.g. slowly accelerating from a stop, braking, moving in stop and go traffic) This NEVER happens when I’m travelling above 10 mph (e.g. if I’m coasting at 40 and let my foot off the gas, the RPM can go to 500 RPM but it will never stall in this case).

Can a stalling engine be intermittent driveability?

Intermittent driveability problems of any kind are always a challenge to diagnose. When a customer brings you a vehicle and complains of a stalling problem, you may not have much to go on other than their description of what’s happening and when it happens.

Why does a vacuum motor slow down when accelerating?

But engineers know that vacuum always decreases on acceleration, so they design the vacuum motors to work despite the vacuum drop. However, if the vacuum motor develops a small leak, or there is a leak in the vacuum hose or the dashboard switch, the drop in vacuum may be too much to overcome. That’s when you get a change in airflow.

What kind of car hesitates when trying to accelerate?

Re: I have a 1995 chevy k 1500 350 tbi it hesitates when trying to accelerate changed plugs wires cap and rotor it dose have… Mass air flow sensor would be suspect. You can’t post conmments that contain an email address. An expert that got 5 achievements. Visited the website for 3 consecutive days. An expert that has 1 follower.

What is the definition of an accelerated stall?

An accelerated stall is a stall that occurs at an airspeed higher than normal due to a higher load factor (g loading).

What causes an airplane to go into an accelerated stall?

Generally, accelerated stalls are brought on by turning or by making abrupt control inputs. To practice an accelerated stall, try these steps: When an airplane turns, its load factor, or airframe stress, increases. That’s the feeling of being pulled down harder in the seat.

What’s the best way to avoid an accelerated stall?

What is the best way to avoid one? As they seem to cause a lot of GA accidents… An accelerated stall is a stall that occurs at an airspeed higher than normal due to a higher load factor (g loading).

What happens when the stall speed goes up?

Because the stall speed goes up, they can stall the airplane even though they normally never even come close at their current airspeed. Instead, they should have just maintained the current bank angle that they had (instead of steepening it) and continued the turn back to re-intercept final using normal maneuvers.

Why does engine RPM jump up at 40 mph?

RPM jumps up & back down at 40mph. The most likely cause is that your clutch is slipping. Either because the mechanism isn’t working properly (rare but possible) or the clutch is worn (very likely).

Why is my car surging at idle speed?

When an engine’s computer can “hunt” or “surge” at cruising or idle speeds it is searching for program compliance, there is a problem elsewhere in the system.

Why does my Car Slow Down at 40 mph?

Loss of Speed. The transmission sometimes can prevent the car from maintaining proper speed. If the car is traveling 40 mph and the speed suddenly falls while the engine continues to rev, the transmission probably is to blame, especially if pushing the accelerator has no effect and the car continues to slow down.

What happens if your transmission goes bad at 40 mph?

This problem can develop at any speed, depending on which gear of the transmission is going bad. The engine will continue to rev as the car tries to accelerate above that speed, but the car will not be able to shift into gear for further speed. Continuing attempts to accelerate can result in severe engine damage.

Why does my car shake at 55 mph?

This procedure involves adding small amounts of weights to each wheel and it is done using a machine. You would notice a problem with the tire balance when driving at a speed between 55 and 65 mph. However, at a higher speed, the vibration is no longer felt. 3. Brake Problems

What happens when you shift the transmission on a car?

When the transmission shifts, engine noise usually will quiet down, and the RPMs will drop. At that moment, a bad transmission can cause the car to jerk, and that could be accompanied by a loud “slamming” noise.

What causes idle surges on a car ECM?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.

Why does my car stall at low rpm?

The will likely force your computer to stall the engine and only allow it to run at low RPMs, which means the car will only move at slow speeds. This is a safety feature enforced by the computer so that your engine doesn’t get too damaged.

Why does my car stall at high speed?