MikeZ28

iTrader: (1)

Basically battery died and I did the pop start once but now i forget..

AJ_92RS

"POP" Start?

If you mean push start then you just have to get the car rolling at a descent speed with the key on, push in the clutch, put it in first gear, then let out the clutch quickly.

Basically "dump" the clutch, "side step" the clutch, or "pop" the clutch.

Is that what you mean by "pop start"?

MikeZ28

iTrader: (1)

Yes or get it rolling on a hill. But in when do you turn the key? with the clutch in or out?

AJ_92RS

Turn the key on, then start pushing the car. That way it's on when you have to hurry up and jump in.

Aaron91RS

iTrader: (2)

I got a question. Most cars have a saftery switch that won't let you start them without the clutch being pressed in, so how do you pop the clutch and start them?

si_camaro

The clutch has a safety switch which cuts the starter circuit preventing the starter from engaging. Dumping the clutch in gear simply rotates the engine manually, without using the starter circuit.

Aaron91RS

iTrader: (2)

I would think, but I have tired to start my bronco with a saftey switch like that and it has never worked.

Zepher

iTrader: (1)

If the battery is completely dead, it might not even start up since there is no power for the FI system.

si_camaro

Some vehicles are harder to bump than others. Sometimes you should use second or third gear rather than first, to give it more of a crank. The bump start merely turns the engine in exactly the same way as the starter motor would. If the ignition is on and the motor cranks, a spark will appear and ignite the fuel.

I've done it many times on many different fuel injection set-ups. Sometimes it works first time, other times it takes a few attempts. It's never failed though!

Personally I always carry jump leads. Damn autos

AJ_92RS

I'm just curious, no flame intended.

Why do people think that? When you're driving a car, the engine spins faster in 1st gear going 10 MPH than it does in 2nd gear going 10 MPH.

Therefore, leaving it in 1st gear will get the engine cranking FASTER at any given speed (how ever fast you're able to get the car rolling.) That will make it easier to start than having it in second or third.

irocnroll89

iTrader: (4)

ok, my take on popping a clutch....
i use either 4 0r 5 th gear.
Yes the motor may turn fast at 10 mph in first, but you are trying to turn the diff. If you are trying to spin the motor quickly, but not so torquey as to lock up the tires, you want to use the higher gear. I know use this method from experience, the physics mahy need a little more interpretation.
shawn

MrDude_1

i was going to say the same thing.

now, if you had really low rear gears though, 1st gear may attempt to spin the engine so fast the the cars tires break loose when you pop the clutch.

3 possable solutions

1. put it in 2nd. that makes the engine rotate at a slower speed, keeping the tires from breaking loose when you pop it.
2 keep it in 1st, but dont push as fast.
3 keep it in 1st and slip the clutch slightly instead of popping it.

AJ_92RS

Well I know from experience also. I have an '83 C10 with an M20 4 spd. The 1st gear ratio is 6.55:1. That's what gear I've put it in and got the easiest results.

I was pushing it by myself with my wife at the wheel. I only had to get it rolling, she dumped the clutch and VROOM!!!

The fear I would have with starting in 2nd is getting the engine to start, then having it die again from slow RPMs. Similar to shifting into 2nd gear while only going 5 MPH.

si_camaro

[edited by si_camaro for lack of sleep]

I had a long-winded response here, but it's 3am and it makes no sense at all. I'll edit it when I get up.

MikeZ28

iTrader: (1)

ok...lets go over this

I have done it once before with my friend and it was in reverse but it worked. Second were talking about a carb here.


So Once im rolling with the clutch in......then what do i do?

1. let it out and try and start it?

2.let it out and push it back in and try and start it?

there is where im lost.

MikeZ28

iTrader: (1)

ok...lets go over this

I have done it once before with my friend and it was in reverse but it worked. Second were talking about a carb here.


So Once im rolling with the clutch in......then what do i do?

1. let it out and try and start it?

2.let it out and push it back in and try and start it?

there is where im lost.

Zepher

iTrader: (1)

While rolling and the key in the RUN position, pop the clutch and the engine will turn over.
Basically, you are letting off of the clutch quickly and then pressing it back down before it stalls.

MrDude_1

let out the clutch quickly.. the engine catches, then you shove it back in real quick before it stalls


otherwise, you would have to hold the gas to keep it from stalling and you would launch....

si_camaro

Sounds like an excellent all-round competition to me....would be more exciting (and a little more dangerous for the pusher) than a 1/4 mile run!