Engine turns over but will not start

Thank you.. Will get back to you

Let me know what you find.

My mechanic just confermed that the valve has been stucked down cos the car has sat down for a long time.. Does it need replacement or e just need to run d valve if he opens the top cylinder.. Am asking all this questions because we don't have expert on car in where I stay in lagos... And pls is a 6 plug car better than a four plug car? How can I maintain a 6 plug car

Did he find low or no compression? If so, remove the valve cover and locate the valves that are sticking. Cover them with oil and gently tap on them to see if they release. They should.

When my mechanic opened the top cylinder he noticed 10 valves got bent so he removed the 2 cylinder and he said he will grand the cylinder and later fix it back that the car will work then, and he. Said the timing jumped aswell...hope notin will happen to the cylinder if he grand it? And he said he will change the jasket too that if he uses the old one that the car might do over heating... That's all he said.. What's your best advice or his he doing the right tin?

I agree that the gaskets need replaced. Additionally, since the timing has jumped, I recommend replacing the timing belt. That is what caused the problem in the first place.

If he is able to replace the valves and everything else in the head is in good condition, you should be fine.

At least we know why the engine was turning over so fast, no compression.

Thank you so much for being there all through.. I will tell him all what you said... In nigeria we believe a four cylinder engine is better than a six cylinder engine... Is it true? And how can one manage a six cylinder engine... Can you also tell me the advantage and disadvantages of the both?

Honestly, one is as good as the other. As long as maintenance is done on them, they will both last you a long time.

A 6 cylinder, by nature, should have more power, but isn't any better or worse. Other than when it comes to fuel usage. A 6 will be likely to use more.

Let me know if you have other questions.

Joe

After changing the 6 valves the car is now working perfectly... But I noticed the check engine sign and Dynamic Stability Control Indicator or Electronic Stability Program on the dash board but the car sounds fine and move very fine.. What can u say about the sign? Thanx for being there

Good morning, thanx so much for your assistance on my car.. I checked my car radiator this morning and I found oil inside the radiator, what could be the cause and what can be done on it.. Pls I need a reply urgently... Thanx for being there

the water in d the radiator is milky, and my engine oil has reduced from where it should b, and I spent like 2hrs in traffic and d car did not over heat... Pls I need ur reply

i may not be a whole lot of help--i do not know your car well

i can only think of a few of things that might make you water milky

if you s.uck out a sample and put it in a tall glass container (sorta like a test tube). let it sit still for a while, undisturbed

if it is oil (crack or head gasket) or automatic transmission fluid (oil cooler inside radiator is leaking) it will rise to the top. you might be a able to determine which one it is by it's color

if it is air, the air will dissipate leaving the coolant--could be possible coolant being aerated by water pump---or head gasket leaking (combustion gasses)---a chemical test might confirm this


is it possible that water pump lubricant has been installed--(as i use in my jeeps) it turns the coolant milky-----this would be normal, and nothing to worry about

as far as effects to the engine, i'd point the finger more toward the head gasket or a crack

only testing is going to narrow it down

the medic

Engine Mechanical problem 6 cyl Front Wheel Drive Manual 141000 miles

I live in Newark, NJ and own a 2000 passat V6. The past few days Ive had an intermittent problem thats gradually growing. The car won't start. It cranks strong but won't run. Does't seem to matter if the car was sitting overnight or 10 min. When it finally does start, there is no pause, it doesn't sputter, just starts right as if nothing was wrong. Car runs just fine. Anyone with advise on what steps to take to isolate this headache.

So far I've verified the spark and ruled out an ignition problem. I have noticed that the coolant temp gauge comes and goes. I don't think its the thermostat because the needle would be in the normal range and then just falls off. The coolant level is fine. I've done enough homework to know that the temp sensors tend to go in my particular make/model. I picked up a coolant temp sensor (8 bucks at autozone) but my hands are too big. The sensor location is just a tease. I can barely reach it let alone remove it. So I still have the problem with it cranking and not starting and I still have yet to change the sensor. Now I'm wondering if the temp problem is related. So now I ask. Could a faulty coolant temp sensor prevent a car from starting?

2000 Passat 2.8 V6, 141k

OK, heres the deal. The fuel pump seems to be working fine. I replaced the coolant sensor. I still have the problem. I'm detecting a weird pattern with it not starting. Starts up cold. No problem, 2 or 3 cranks the most. After 10 min of driving, when its nice and warmed up. Comes right back on with a few cranks or wont start at all. After 15 or 30 min on a warm day. It just cranks away but wont start. Ive read something about pressing the gas pedal to the floor to cut off the fuel injectors. I cant tell if that makes a difference. Ive already killed the battery just from cranking alone. I can either give it more time to cool off or roll it down the driveway. "Its a stick". I know popping the clutch isn't recommended but it works. I also feel like a slight hesitation or rather engine vibration when accelerating. It idles fine and the acceleration just inst a smooth as I think it should be. I also have Check engine light with the infamous "Emissions Workgroup". Could this be a timing issue? Valve deposits? Cam Speed sensor? No idea.I feel like I'm grasping at straws over here.

Heres another note. I went to Autozone to have them check my trouble codes. I have 2, P0322 (Ignition engine speed input signal no circuit) and P0441 (EVAP system incorrect purge flow). Im not sure how to handle this. Im still trying to get that to make sense.

Much appreciated,
Red

This sounds like you have a crankshaft angle sensor that needs to be replaced. Here is a guide to show you what you are in for when changing the sensor.

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

This cars had a problem with them

Here is the location for your sensor for your car (below)

Check out the diagrams (Below)

Please let us know if you need anything else to get the problem fixed.

Cheers,

And now when I try to start it, the tachometer bounces below idle and still wont start. So I took it to the dealer and they replaced the crankshaft sensor now the car runs.

Thanks
Red

2000 Volkswagen Passat 4 cyl Automatic 115500 miles

Recently I discovered that when I tried to start my car it well, wouldn't. I recently put in a new battery and it was working fine, for several weeks and then nothing. The radio and the head lights are working, but the interior lights do not. I checked the fuse and it looked undamaged.

I believe it is the Ignition Coils. I had to replace the cylinder head gasket and as a result of it failing oil filled up the chambers that housed the spark plugs. So at that time I replaced all my spark plugs, but couldnt afford the ignition coils at the time. I also had the check engine light on and the shop mechanic said it was due to a miss fire of some sort. I'm 98% sure he said it was because 3 of the 4 ignition coils were not working properly, which would make sence because of the oil damage, and essentially it was just a matter of time before the final one failed.

So my question is, do you agree it is the ignition coils or do you think it could be something else, and how would I be able to check?

Hi jonnywhiteline,

Thank you for the donation.

When engine could not be started, there are various reasons and you need to verify what is missing to cause the problem.

Check the following link and see if you can come up with anything and let me know the results.

https://www.2carpros.com/kpages/first_things.htm

car was fine drove early no problems later that eve went to start car and it wouldnt start

if the motor is turning over as normal but won't fire up, under the conditions you specified it sounds like my first guess would be fuel pump. Do you hear the fuel pump turning on when you turn the key to on?

If it's turning over and not starting, get it scanned. Most likely have an engine speed sensor fault. That or a relay issue.

Hi,
I have a 2001 VW Passat that won't start, very low miles in great shape otherwise.

What are the possible problems and fixes?

first thing i can ask you, does it crank? as in the starter engage and attempts to start or nothing happens when the key is turned?

if it doesnt crank then you should turn on the headlights and other accessories such as the fan and try to start it, if the headlights dim then the ignition switch is good, if not the ignition switch may be bad.

if it does crank and not start. i would check the fuel pressure, and compare it to specs, and i would check for spark, should be bright and blue.

Engine Mechanical problem
2001 Volkswagen Passat 4 cyl Front Wheel Drive Automatic

Engine Mechanical problem
2001 Volkswagen Passat 4 cyl Front Wheel Drive Automatic

i have a 01 vw passat that died while my wife was driving so i had it looked at and was told i didnt have compression and my timing belt was broke. later i decided to look myself and found out the belt and the chain were fine. i dont have compression,could the belt jump a cog? i looked at the timing marks on the crank and cam, according to the marks its in time. i have spark and fuel .are there timing marks on the cam shaft for the chain on the camshaft?also i have a chilton repair manual and it says if you have a bad sensor the car wont start,if so which sensor is it thanx

You have a previous question about this same problem. Here is a link to it:

https://www.2carpros.com/forum/2001-volkswagen-passat-no-start-vt462810.html?highlight=

There are diagrams you can use to check to see if the timing chain has jumped.

A bad sensor would not cause a no compression situation.

Engine Mechanical problem
2001 Volkswagen Passat 4 cyl Front Wheel Drive Automatic

i have a 01 vw passat that died while my wife was driving so i had it looked at and was told i didnt have compression and my timing belt was broke. later i decided to look myself and found out the belt and the chain were fine. i dont have compression,could the belt jump a cog? i looked at the timing marks on the crank and cam, according to the marks its in time. i have spark and fuel .are there timing marks on the cam shaft for the chain on the camshaft?also i have a chilton repair manual and it says if you have a bad sensor the car wont start,if so which sensor is it thanx

Hello and thanks for donating


If the timing jumped it would still have compression, just low compression. Is the check engine light on? You may have a faulty crank or cam position sensor.

the engine light is not on,and i already replaced the camshaft sensor. does it have a crankshaft sensor? where is it located,thanks

sorry bout that, no crank just a cam sensor. are timing marks lined up as shown below

yes the marks are right on

if timing is good and sensor is good then only things left that will cause poor compression is internal mechanical issues such as worn piston rings, valve seals etc... would have to tear down the motor and inspect all the components to find the issue.

Engine Mechanical problem
2001 Volkswagen Passat 4 cyl Front Wheel Drive Automatic

i need help my car has been down for 2 years the engine turns over, it has no compression.here is what i checked out;it has fuel,it has hot enough spark,the timing belt is fine and in time,i replaced the camshaft sensor i took the spark plugs out and saw the pistons move up and down. My wife was driving it when it died, there was no noise or anything ,it was just all of a sudden. would really like some help, thanks,Chris

bad rings on one piston will effect the others?

Check the fuel pressure if its within specs and also if the injectors are pulsing.

Equally scored cylinder walls? Bad rings? high mileage motor? Dual blown head gaskets? Maybe the valves are not properly seating? Did the motor get over-revved and the valves are ever so slightly bent? many things mechanically can do it and most likely if one is bad all are bad (piston rings , valves, etc...)

Fuel pressure

Vacuum hose to regulator connected 3.5 bar
Vacuum hose to regulator disconnected 4.0 bar

the fuel system is fine same results what next

it has no compression. I've overlooked this one-Very low engine compression the engine will not start

the fuel system is fine same results: I take this that the fuel pump is producing the correct fuel pressure as mentioned earlier but is the injectors pulsing

Even if the pistons are up and down- could have jumped timing but being park for 2yrs the engine just don't lose compression and jump time.

Give me more info am lil confused here-this engine should fire up if this 3 ingredients compression/fuel and spark are up to par. Something is not right

2001 vw passat wont start. I checked the fuel pump and it wasnt running when I started it. replaced the fuel pump relay and the fuel pump now runs but car still wont start.

the car died while driving two years ago. right after it died i tried starting it did the same thing its doing now.what about the head gasket,if that is bad wouldnt there be oil leaking where its bad?

The experts need a bit more info before they can help.

Did you check:
- for ignition spark?
- injector pulse?
- fuel pressure?
- crank sensor?
- stored ECM codes?

When was the last time it ran? Any symptoms that lead up to the no start? Hesitation? Long crank time the day before? Cutting out / stalling?

Thomas