21 votes
Accepted

Why do cars die after removing jumper cables?

It's because of a couple things: The battery is very dead and the alternator cannot put out enough power at idle RPMs to run the whole system and charge a battery. This leads to a lack of power which ...
Cc Dd's user avatar
  • 2,879
16 votes
Accepted

Harley Davidson clattering noise from engine, backfire and failure to start

With a no-run scenario, think FASTEC: Fuel Air Spark Timing Exhaust Compression As there's smoke on one side only, I'd be focusing on testing for spark, timing and compression. If I had to hazard a ...
Zaid's user avatar
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11 votes

Harley Davidson clattering noise from engine, backfire and failure to start

FASTEC is exactly the right process to analyse this, as @Zaid said. It turns out it was contaminated fuel! That doesn't really explain why smoke just from the aft cylinder, and why there was smoke ...
Rory Alsop's user avatar
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9 votes

My brand new bike stopped while running - why?

The Royal Enfeild is a very old design. The motorcycle is based upon an old British design from World War II and has changed very little over the years. I do not know what type of quality control ...
DucatiKiller's user avatar
  • 32.9k
5 votes
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08 Silverado 5.3 cold start exhaust smoke and engine stall

Oil consumption in the LM7 engines is pretty common. The L33 in my '06 Silverado is around the same amount, maybe a little less. What you are talking about sounds more like a stuck/leaky injector. Oil ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes

Vespa idles fine, stalls with throttle

It sounds to me as though your carburettor has a blocked main jet. I'd remove it and clean it out with compressed air or carburettor cleaner. The idle circuit uses a different jet which is probably ...
Steve Matthews's user avatar
5 votes

How does this ignition coil work? Why are there two wires, and where should they be connected?

The usual idea is that with 2 wires; one is ignition controlled 12v and goes to the resistor (block on the side with two terminals) so that the coil receives about 9v during normal running. The other ...
Solar Mike's user avatar
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5 votes
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Why underbone's engine doesn't stall when the bike is not moving

There are many different models of this type of bike/scooter but they all have an automatic clutch system to allow smooth starts and to prevent the engine from stalling when stopped. Some are the ...
jwh20's user avatar
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4 votes
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98 olds intrigue stalls while driving

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 ...
zipzit's user avatar
  • 6,539
4 votes

No Acceleration, loss of power, backfiring, CEL, stalling

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 ...
Ben's user avatar
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4 votes

engine stalling when coming to a stop

I suspect your Idle Air Control (IAC) Valve. It's job is to feed enough air to the engine when you take your foot of the throttle. This is a 15 year old engine we are talking about, the valve may be ...
tlhIngan's user avatar
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4 votes
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94 Z28 LT1 Camaro. Intermittent stalling/starting problem. Been haunting me forever

There are two places this could be: ICM or Optispark. The intermittent nature of it leads me to believe it is ignition related. On your year of LT1, ignition issues can pretty much be boiled down to ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
4 votes

Why do cars die after removing jumper cables?

The majority of cars built in the last 10 years have what is known as a smart charge system, i.e. the alternator only puts out what the consumers demand. With a totally flat vehicle and a donor car ...
John Billington's user avatar
4 votes

Why do cars die after removing jumper cables?

Vehicle behavior depends on the two types of alternators: A vehicle with a self-exciting alternator (aka one-wire alternator) will run without battery power. This describes my Honda and most Chevys. ...
kmarsh's user avatar
  • 2,159
4 votes

How is this diesel engine stalling pattern caused by dirty air filter?

I can’t see this being the issue. If the previous day the vehicle was driving fine, then it must have been getting enough air into the engine to support the fuel that was being injected as required ...
HandyHowie's user avatar
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3 votes

Engine stalls when RPMs reach 4500 under load, but not when vehicle stationary

Sounds like fuel pressure drops off, fuel pump is weak, you would need a fuel pressure gauge connected when it stalls to check this
Moab's user avatar
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3 votes

89 Pontiac Trans Am GTA Stalls No Start

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.
Moab's user avatar
  • 7,990
3 votes

Car lost power. New alternator, new battery, and just had an oil change

"I am hoping I just mistreated my car, and put it from reverse to drive too soon." More than likely. Modern transmissions have safety features that don't allow you to actually engage into reverse ...
Dalton D's user avatar
  • 1,958
3 votes

2010 Hyundai Tucson Intermittently Stalling After Starting

It sounds like the car is unable to maintain sufficient pressure in the fuel rail. Have a look at this answer for more details on potential causes for hot start problems. It is usually a good ...
Zaid's user avatar
  • 39.1k
3 votes

Car stalls and won't restart, but disconnecting the battery fixes it?

It sounds like you have an intermitant failing sensor. On most of the systems I have worked with the crank sensor isn't required and wouldn't inhibit the engine from starting. The cam sensor or ...
mreff555's user avatar
  • 163
3 votes

No fluid under thermal sensor | '89 Jeep Cherokee reserve cooling system won't drain? | Car dies while running? & Car dies without running?

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 ...
DucatiKiller's user avatar
  • 32.9k
3 votes

car stalls after lifting rear end

what you're describing is actually normal for these cars :) I own a 2005 OBS and I have found that the ECU takes a bit of time to re-learn how to idle after the battery terminal is removed (this ...
Nathan Tehrani's user avatar
3 votes

Restart when stalled while moving

The van was likely not fully stalled, just shuddering at very low revs in 6th gear, as 6th gear will have been too high for your road speed. The van likely only stalled when you depressed the clutch,...
Orb's user avatar
  • 5,067
3 votes

1995 BMW 325i stalls

Thank goodness for my mechanics that kept on researching until they figured it out. They didn't keep replacing parts guessing at what was wrong. But they kept on it. They called me one day and said ...
Tammi's user avatar
  • 61
2 votes

Car stalls/dies suddenly while driving and is not starting again

What you're describing is almost certainly an electrical problem (or two). It sounds like two things are happening and they are quite likely related: Something is causing the engine to shutdown (your ...
dlu's user avatar
  • 14.5k
2 votes
Accepted

'96 Saab starts, stalls

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 ...
HandyHowie's user avatar
  • 25.2k
2 votes

Vehicle tries to stall when at a stop

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 ...
Hᴇʀʙɪᴇ's user avatar
2 votes

What can cause intermittant stalling for a Ford Windstar van?

If your scanner can't connect, the ECU is your problem. Swap it with one from a junkyard to see. You had been successful in using this scanner with this vehicle before, right?
tlhIngan's user avatar
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2 votes
Accepted

Automatic stalls, then struggles to go up gear, revs bouncing - would low/bad fuel explain this?

What you have described are classical symptoms of what happens when a bad batch of fuel finds its way inside an engine - sputtering/coughing/misfiring during low-load operation. If the issue recurs ...
Zaid's user avatar
  • 39.1k
2 votes
Accepted

98 Mazda 626 with Intermitant Stall and Restart Problem

So my long standing suspicions regarding the car's security system being the source of some strange stalling problems seems to have been confirmed: The Cobra alarm system which was installed in the ...
Robert S. Barnes's user avatar

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