Violent bucking starting second gear

[pwp25si]

Does the si have anti stall? I usually dont have a problem starting in second gear on a slight downhill, but this time the car kept bucking violently until I pushed the clutch in after maybe 3 or 4 seconds. Why didn't the car just stall? Do you think it caused any damage? Thanks for reading.

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[pwp25si]

Not popstarting. I mean taking off at red light down a slight incline.

 

[Chilly613]

I believe this is what's called "lugging the engine". You're at a higher gear while at a low RPM and yes, its not good for your car.

 

[pwp25si]

I dont think you know what pop starting is. Ignition was already on, and I was rolling upto a red-light, almost coming to a stop. Thats not pop starting. I've never had this problem before. When the light turns green abruptly, I go into second instead of 1st. Going into 1st would actually jerk the car because the incline will drive the wheels faster. Normally, if i lift the clutch too quickly the engine would just stall, but this time, it was as if the car was trying to save it from stalling. Weird freak occurance I suppose. Even taking off in second on flat ground wouldn't cause violent bucking. I know the feeling of lugging.

 

[marcusm86]

I dont think you know what pop starting is. Ignition was already on, and I was rolling upto a red-light, almost coming to a stop. Thats not pop starting. I've never had this problem before. When the light turns green abruptly, I go into second instead of 1st. Going into 1st would actually jerk the car because the incline will drive the wheels faster. Normally, if i lift the clutch too quickly the engine would just stall, but this time, it was as if the car was trying to save it from stalling. Weird freak occurance I suppose. Even taking off in second on flat ground wouldn't cause violent bucking. I know the feeling of lugging.

you are right.. i must not know what pop starting is.

i suggest you change your wording " I usually dont have a problem starting in second gear on a slight downhill" which does not sound like "I was rolling upto a red-light, almost coming to a stop"

i removed my comments and wish you the best of luck on figuring out your issue.

 

[pwp25si]

Youre right about my third grade level writing. Im sure the engine is going to be ok.

you are right.. i must not know what pop starting is.

i suggest you change your wording " I usually dont have a problem starting in second gear on a slight downhill" which does not sound like "I was rolling upto a red-light, almost coming to a stop"

i removed my comments and wish you the best of luck on figuring out your issue.

 

[madbikes]

I think what OP is trying to do, that is start in 2nd instead of having to go into 1st, while the car is crawling very slow on a light decline.

If you are going slower than what 2nd gear can do at idle speed, you have to raise your revs up a little to slip into 2nd.

A more detailed explanation: Say at 2nd gear can do 13mph on idle speed (to figure out, you stay in 2nd, let revs drop past idle speed. It'll come back up and stabilize). If you are still rolling slower than that (say 8mph) and the light turns green, you have to give some revs and slowly slip into 2nd. If you clutch out and stay in 2nd, of course the engine is going to buck and try to go back to idle, because you are too slow.

 

[TypeRD]

Exactly. You have to feather the gas while also slowly letting the clutch out…or you’re going to have a bad time. Practice doing it in 1st as there is less chance of lugging.

 

[Spart]

Dude, start in first gear. I don't care if you're on an decline or not. This is not a 1970 pickup truck with granny low.

This was answered perfectly already:

I believe this is what's called "lugging the engine". You're at a higher gear while at a low RPM and yes, its not good for your car.

And you just want to continue to argue.

Definition of an askhole.

 

[pwp25si]

Relax. Im not trying to argue. Im not the only person who uses "start" and "taking off" interchangeably. I drive on the same road every morning, and this has never happened before. You feeling tough calling somebody out on a civic forum? Lmao.

Dude, start in first gear. I don't care if you're on an decline or not. This is not a 1970 pickup truck with granny low.

This was answered perfectly already:



And you just want to continue to argue.

Definition of an askhole.

 

[madbikes]

When the light turns green abruptly, I go into second instead of 1st. Going into 1st would actually jerk the car because the decline will drive the wheels faster. Normally, if i lift the clutch too quickly the engine would just stall, but this time, it was as if the car was trying to save it from stalling. Weird freak occurance I suppose. Even taking off in second on flat ground wouldn't cause violent bucking. I know the feeling of lugging.

Here are my recommendations to achieve what you are looking for (similar to rolling a stop sign on a light decline, that seems to apply to OP):

1) Ease the clutch slowly back to 1st. Just have to feather the clutch (no gas) so it's less jerky. The differential is on the big side (4.3:1), you can only do so much.

2) If the decline is steep enough to pick up speed reasonably, I'd just keep rolling a little faster and ease into 2nd

3) As suggested above, rev up and ease the clutch up into 2nd

 

[Spart]

Relax. Im not trying to argue. [proceeds to argue]

The Civic Si can do 31.5 mph in first gear.

Assuming a 900 rpm idle speed, you are *idling* in second gear at 7.5 mph.

So just to get going in second gear, you have to slip your clutch up to at least 7.5 mph unless you want to make the engine very unhappy.

And realistically, you don't ever want to be applying power at idle. This is definitionally "lugging the engine".

You don't stop "lugging the engine" until you are around 1000 rpm above idle. So call it 1900 rpm.

To get to 1900 rpm in second gear, you need to be doing 15.9 mph.

So you are lugging the engine, and thus getting an expected result of lugging the engine.

This is a classic rookie blunder.

If you disagree, take it to the dealer and tell them to fix it. Let them know that if they can't fix it, you'd like to trade it for an automatic.

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