Starts up without rolling over

Used to have to park my beater vw in college on a hill so I could roll down and start it.

 

Like I said if you don't understand. You don't. It's simple already explained.people understand the dealer understands everyone except few understand

 

Engine roll over is a term I’ve never heard but can understand it from context. It’s always been cranks or turns over in my experience.

OP - you’re saying the engine just starts immediately instead of the typical “chug chug chug vroom” after turning the key?

 

I’m skeptical that anyone understood “the truck starts up without rolling over and has a clunk at times” without asking questions or making guesses.

Most people I think would define “starts up” to mean the truck transitions from a state of not running to a state of running, but you seem to mean that the truck does NOT transition from not running to running.

I have no idea what you mean by “rolling over”. I’m guessing you mean “turns over” but that phrase doesn’t make sense in the context of your sentence. See previous point.

I have no idea what clunk you might be referring to.

Do you mean it turns over (ie the starter rotates the engine) but doesn’t start? I.e. the battery and starter are good but you are not getting spark, fuel, or compression?

BTW, do you have push button start or do you have a key?

 

Dude I've said what the problem is I'm using the term you'd like ""turn" so idk why u don't get it. The truck starts up immediately. (That means the truck runs for you dummies.) When I turn the key over. (That's where u put the shiny stick into the ignition.) The starter ( thing that "turns" the flywheel) does not need to crank. It's fires up without any rotation of the flywheel(technically it does if not it would not run.) It's immediate combustion . followed buy a clunk. ( clunk means in my opinion a the sound of 2 metals coming into contact with each other)

 

It’s impossible for the engine to start without the starter rotating the engine. There needs to be a theoretical minimum of one compression of a cylinder and that requires energy input from the starter (ignoring push starts). Are you perhaps saying that the truck starts too fast? If so, what are you complaining about?

 

I literally just said it does. If not it wouldn't be able to start I said there is no crank. Like multiple revolutions of the starter. As if you would bump start it. If u don't know what that means. Don't answer

 

This thread delivers.

 

Why this thread needs 3 pages (and counting) I don't know.

There's no issue here. OP is referring to when the engine starts without a perceivable "cranking" sound.

This typically can happen when these conditions line up:

- Engine already warm. (And therefore still well-lubricated.)
- Battery at high state of charge and in excellent condition. (I.e. can supply a TON of current.)

A strong battery can "kick" the engine harder, resulting in a faster cylinder travel & stronger compression, making it more likely to start on the very first cylinder stroke.

I typically experience this condition for a few weeks after getting a brand-new starter battery. After some time goes by, the battery starts to age a bit & its max cold-cranking amps round off/dull a bit and the truck returns to a normal ~2-3 revolutions before starting up.

I think this thread can end now.

 

We need more forum members who can produce high-quality content like this. Stick around!

 

Thank you. Lmao people are so ignorant. They knew what I meant but because I didn't say it the way the wanted I was wrong. Basically wanted to see if there was any solution. Seen many people with same problem but no explanation towards the sound. Thanks

 

After reading this thread, I noticed my truck will do something similar if I restart shortly after turning it off. It sometimes fires up immediately just as the starter begins to turn. No "clunk" sound. Don't really worry about it though. I figure it previously stopped at just the right spot for spark/fuel/cylinder position timing and enough fuel to ignite is still in the cylinder (since I just shut it off). I have pushbutton start though, so could be different dynamic for key start (e.g., sequence of ignition power/starter actuation during key turn). I still think spark/fuel timing and cylinder position would need to be just right to fire up immediately.

Just spit-balling, I wonder if there could be faulty signal to the spark plug to fire? I'm thinking a scenario where the the key turn sequence sends ignition power prior to starter actuation power, coil gets a early/faulty signal to fire a spark plug (or all spark plugs), and there's enough fuel in cylinder to ignite (like if just previously turned off the truck). If the cylinder wasn't in the correct position during ignition, I could see a "clunk" sound as engine fully starts and is out-of-time with first firing cylinder. Maybe a short in the key ignition assembly wiring could cause key turn sequence to be out-of-order? Maybe a computer error is sending signal to fire all spark plugs at once on key turn?

 

I was thinking it could be a computer thing. If it doesn't make the sound it wouldn't bother me. Sometimes it just makes a click. I first thought it was the starter still engaged and grinding . But I don't believe it's that.

 

It’s like the war on drugs, Officer Thread Police. It will never end.

 

Since you repeatedly insulted me when I was just trying to help you, I have some possible solutions for your “my truck starts too easily” issue. I’ll even do the work pro-bono.

1) remove one of the spark plugs
2) install a very old battery
3) stuff the MAF sensor with a mouse nest
4) put 55 octane gas in the tank

 

Odds are itll crank ATLEAST a few times...

 

Spark, fuel. Timing for the win.. exactly what my truck does I noticed after a short stop and get back in. Turn the key... small clunk sound and engine is running instantly. No starter cranking the engine, but just a milli second.. You have the best explanation of what I was thinking of what was happening. This happens quite alot for me as I stop and go alot for my work. OP you're not alone. Almost 60k miles on my 22. Been doing it since new. I Started paying attention to it after your post. A lot of times it's after engine was warm and started back up within a few minutes. Bjmusico summed it up best.

 

No... I have the same issue but didn't think it was a problem. Sometimes I turn the key... and it instantly is running without cranking, turning over, rolling over. And has a small clunk sound.

 

Please explain why quick easy starting gives you anxiety.