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15

What it comes down to is there are trade offs. In the case of the engine, it's torque output and rotating mass versus engine speed ... read on. First, it isn't power which is needed, but torque to keep an engine running. In the early days of engines, each had one cylinder and didn't run very fast. To keep it running, it had a very large flywheel attached to ...


7

No. Stalling the car will not damage your car , your car is designed to absorb the impact at least a hundred times.(Most of my family members learnt driving in my car and it has stalled half of its life and its working perfectly) Stalling the car extremely frequently especially with load(passengers) can put additional stress on the transmission components ...


7

An insufficiently-charged battery would explain what you're seeing: the unresponsive throttle is because the throttle is electronically-actuated (at least that's what eBay reckons) Not sure about the Sentra, but airbag and engine oil lights can turn on due to insufficient voltage the engine will stall because the fuel injectors need electricity to ...


6

Possible Answers We were hoping for a little feedback regarding this issue prior to attempting an answer. A few things come to mind regarding the problem description and we'll run through a few of them for you. Regarding Stalling Fuel Filter - Your fuel filter may be impeded and require replacement. Since you have not indicated this happens at higher ...


6

Your data logs tell me the following: Fuel trims are fine Here are some plots I generated from your data for both short-term and long-term fuel trims. The plot above (Bank 1 STFT vs Bank 2 STFT) show that there is no bank imbalance and most of the data points hover around zero STFT correction, which tells me that feedback from the O2 sensors is ...


5

Problems like this are addressed in Charles Probst's excellent reference, Bosch Fuel Injection & Engine Management. From what I can gather, the Mk1 Golf utilizes a basic K-Jetronic system illustrated in the diagram below1 (which operates on the principle of continuous injection). The stalling symptom is an indication that the air-fuel mixture is not ...


5

All EFI engines shut off the fuel injectors when the accelerator is released above a certain RPM or speed (varies by manufacturer). It's easier to detect on newer model cars with a digital instant fuel economy gauge where when cruising at 55 MPH and the accelerator pedal is released, the economy readout will shoot from 30 MPG to the highest number or the ...


5

In this case replacing the fuel filter for new seems to have done the trick. I was able to find one for roughly £27 on eBay and fitted it myself in under 45 minutes. Thought I'd leave the information here in case anyone else has the same issue.


5

To add to Zaids answer. A cheap meter from RadioShack will tell you if something is wrong with your power system. A normal car battery will be at 14.4 volts (+-.75v) when on. 7.10V is not normal and indicates a problem. As for your gas petal, not accelerating is a necessary safety feature implemented by all manufactures that use digital throttles. ...


4

The sensor should not cause the engine to stall. All of the accessories not working (power steering and brakes) would be normal with a stalled engine. What I would be looking at is the fuel pump might be going bad. A mechanic can easily check this by placing a fuel pressure sensor on the fuel line to check the pressure. If the engine is losing fuel pressure, ...


4

Fuel, Air, Spark... those three things in the right amount are what makes the engine go. The good news is your car's fuel system is controlled by a computer which gives feedback on possible issues in the fuel system. You are going to want to read the stored codes. Not sure where you are located, but in my location Autozone offers a free service to read ...


4

There are scanners that will talk to OBD1 computers, but most shops (I would guess) don't have the equipment anymore. I got rid of my OBD1 equipment last year. I've seen ≤ 2 cars that required me to use it in the past 4 years. Maybe a GM dealer would still have the equipment. You would have to call around and ask. By jumping pin A to pin B on the ALDL ...


3

There is a sidestand switch that kills the motor if you attempt to put it into gear with the sidestand down, it's a safety measure. Check that switch at the top of your sidestand to see if the a mount bolt or nut has fallen out thereby loosening the switch and making the vehicle inoperable when you put it into gear.


3

The engine is optimized to be efficient at high rpm or at low rpm (racing engine or cement mixer design respectively) but it can't be efficient at every possible speed so it is up to the driver to choose the best gear and speed to match the capabilities of the motor he has, i.e. keep it revving at an appropriate rpm for the speed/torque demanded of that ...


3

The idle air control valve is integrated into the throttle body unit as shown here: It may not look exactly like that, there was an update some time around then but the parts are very similar and the principles are the same. There is a forum thread with a few more pictures of the cleaning process here: http://www.renaultforums.co.uk/showthread.php?t=...


3

I will explain it for an EFI engine with a manual transmission because it might not be as straight forward with a carbureted engine or automatic. For ease of explaining this I will consider the engine as "on" whenever the ignition switch is set to the "on" state. This means that the ECU is on and is monitoring the engine state and controlling it's behavior. ...


3

The most common cause of this complex of symptoms is leaking intake manifold gaskets. Test for this by spraying a squirt of carburetor cleaner up and around the intake manifold. If the engine smooths out for a few seconds then there is a leak. The second most common cause is failure of the mass air flow sensor (MAF). I offer no quick tests for this part ...


3

Your Problem There are a few reasons that you might have your engine cut out. If you have any error codes (found by plugging in a scan tool to the OBDII port on your car), they would help dramatically in being able to narrow down the array of possible answers to your problem. If you do have a faulty connection, which I don't think you do, then a code ...


3

I have experienced the same symptoms on an engine, where the MAF sensor was giving lower than expected readings. The engine would only run for a few seconds before stalling. A new MAF sensor fixed the problem. I tested my MAF on the bench with a hair dryer and a multimeter. It wasn't until I got a replacement that I could see how low a reading the faulty ...


3

This may assist in diagnosis May not be an answer for you but you mentioned; The spark plugs are burned at the tip. The definition of burned is important to your diagnosis. If burned means the electrodes are eaten up a beat you could be suffering from a lean condition from a vacuum leak or a sensor not reporting properly to the ECU. IF you have a ...


2

The issue ended up being a bad gas cap. When the mower starts to sound like it is dying, I simply unscrew the cap for a few seconds and it kicks right back in. I will replace it eventually but it has been running for 2-3 months now without issues as long as I let the tank get some air every 10-15 minutes. I am sure cleaning the carb & replacing the ...


2

It is a carburetor problem, but only because the fuel and air mixture is too lean. In cold environment there is more oxygen in the air, which increases the amount of "air" in the air-fuel mixture. This is further proven by the fact you have to accelerate to keep the bike alive - by accelerating you use parts of the carb only used in medium/high openings, ...


2

I eventually found the issue: the fuel lifter pump was faulty. For those that dont know, the Mk1 has 2 fuel pumps - the main one underneath the car (or, on some variations, in the engine bay) and a 2nd 'lifter' or 'transfer' pump that sits inside the fuel tank and can be accessed by removing the rear seat. This 2nd pump's bearing were gone. The primary pump ...


2

Turns out it was because of my stand being down :/ I've not been riding for too long and didn't even know they had that kill feature, am glad it is there, un-glad i had to walk! :)


2

The engine computer looses is idle speed learning whenever it drops below nine volts even for a short time. The problem here is the starting battery or its connections. Hook up a voltmeter across the battery terminals then crank the engine for 15 seconds. The voltage should remain above 9.6 volts. If the voltage drops below nine the computer will loose the ...


2

Sounds like either a dirty throttle body, bad idle speed motor, or bad coolant temperature sensor. I would start with cleaning the throttle body. If there is gunk in there, the AIS may not be able to let enough air by to raise the idle. The AIS automatically set the idle speed based on several factors, mainly engine temperature. The cold idle should be ...


2

I took the care to the a mechanic and they said it was or could be two things: When the battery dies sometimes the internal computer\memory needs to be reset. The car's throttle body needed cleaning. So far it has not stalled after having both of these done (5 days now). Not sure which of the above actually of the above fixed the issue ... maybe both. ...


2

For something along this line would be a diagnostic service fee. When you take a vehicle in for regular maintenance and ask them to see if they notice anything they do not hook up any computers to pull codes and it's typically a visual check. Depending on the tech and if they use a lift some will check suspension but if it's a drive through oil drain area ...


2

My guess is fuel pressure, a bad pump or clogged fuel filter. I would put a fuel pressure gauge on it and see what the pressure is next time it stalls and you try to restart.


1

Check the idle air controller actuation and internals, it may be stuck in one position, or clogged. If the IAC is stuck in an open position, it can recycle too much oxygen depleted exhaust to the intake and kill the engine. If clogged it can throw engine management out of wack. You'll find the IAC connecting the exhaust to the intake in some way, and it ...



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