LS430 is slow to start?
08-09-11, 10:27 PM
#1
Driver School Candidate
Thread Starter
Join Date: Jul 2011
Location: CA
Posts: 25
Likes: 0
Received 0 Likes
on
0 Posts
LS430 is slow to start?
Love the car, LS430, CY2001, mileage 77,777. However it does not start immediately. How long does it take to start an LS430? Does anyone know what the mechanics manual provides for a standard. Thanks, Bill
08-10-11, 07:59 AM
#3
If im not mistaken, it cycles through a rotation of the cylinders first to get the oil flowing before the initial ignition to prevent excessive engine wear. my LS430 takes a full second to a second and a half before ignition. my LS400 took almost 2 seconds before ignition.
you have to give us more detail though to further help you on your issue though.
you have to give us more detail though to further help you on your issue though.
08-10-11, 11:02 AM
#4
Pole Position
they all take a couple seconds to fire off,, been discussed here several times in the past,,
wife's turbo bug just takes a touch of the key and it is gone, never the 430,,
Derry
wife's turbo bug just takes a touch of the key and it is gone, never the 430,,
Derry
08-10-11, 04:37 PM
#6
If im not mistaken, it cycles through a rotation of the cylinders first to get the oil flowing before the initial ignition to prevent excessive engine wear. my LS430 takes a full second to a second and a half before ignition. my LS400 took almost 2 seconds before ignition.
you have to give us more detail though to further help you on your issue though.
you have to give us more detail though to further help you on your issue though.
The following users liked this post:
DBinMD (02-10-24)
08-13-11, 07:32 PM
#8
Some cars have computer controlled crank that gives the impression of a very quick start. I believe this was introduced on some cars about 10 years ago, with almost universal application now in 2011 model year.
When you hit the key (or start button) on a computer controlled crank car, the actual cranking control is taken away from the driver, no matter what they do with the key. If you momentarily hit the key and release, the car will still crank until idle speed has been achieved, then the starter is automatically disengaged. This gives the impression of instantaneous starts as you quickly hit the key and release to start.
That said, even without computer controlled crank, I think our LS430's have really crappy start-fuel and fast idle speed calibrations. Mine cranks way too long before it starts, and doesn't have a crisp reassuring fire-up. Then, the fast idle when cold seems way too high, for way too long. (Sometimes this high idle speed is used to help light off the catalysts and keep emissions down, but in this day and age, there are other ways to accomplish this without a roaring engine.)
GM was a leader in nice engine starts, being one of the first to use computer controlled cranking and a quick return to base idle speed.
Very insignificant items that make no real difference in starting reliability, but certainly people notice it.
I’d take my LS430, despite the imperfect starts, over almost any other car.
When you hit the key (or start button) on a computer controlled crank car, the actual cranking control is taken away from the driver, no matter what they do with the key. If you momentarily hit the key and release, the car will still crank until idle speed has been achieved, then the starter is automatically disengaged. This gives the impression of instantaneous starts as you quickly hit the key and release to start.
That said, even without computer controlled crank, I think our LS430's have really crappy start-fuel and fast idle speed calibrations. Mine cranks way too long before it starts, and doesn't have a crisp reassuring fire-up. Then, the fast idle when cold seems way too high, for way too long. (Sometimes this high idle speed is used to help light off the catalysts and keep emissions down, but in this day and age, there are other ways to accomplish this without a roaring engine.)
GM was a leader in nice engine starts, being one of the first to use computer controlled cranking and a quick return to base idle speed.
Very insignificant items that make no real difference in starting reliability, but certainly people notice it.
I’d take my LS430, despite the imperfect starts, over almost any other car.
08-19-11, 07:18 AM
#11
good tip!
08-19-11, 08:24 AM
#12
Moderator
Another factor in delay on start is fuel pump. In almost every modern car the fuel pump has to kick on to re-pressurize the fuel system before the engine can start.
As the key moves from Off past ACC to Start, the fuel pump relay has to click from open to closed position to then energize the fuel pump which allows the engine to start.
As the key moves from Off past ACC to Start, the fuel pump relay has to click from open to closed position to then energize the fuel pump which allows the engine to start.
01-06-15, 10:25 AM
#13
Driver School Candidate
Join Date: Jan 2015
Location: new zeland
Posts: 2
Likes: 0
Received 0 Likes
on
0 Posts
Hay im had the ls430 a few days and had the same thing it turns ova alot longer then im use to but a few times it dose it qwite long and sounds like its only just abel to start idel in the moring is a lil odd to wood new plugs or etc help this??
01-06-15, 11:52 AM
#14
Moderator
Now, we'll need more information about your car before any assistance can be given.
Miles?
Age?
Maintenance history?
Once you give that info, then someone can respond
It may be fuel related, or plugs, or some other electrical issue. Maybe even bad gas, if it's been sitting a long time..
01-07-15, 02:29 PM
#15
If im not mistaken, it cycles through a rotation of the cylinders first to get the oil flowing before the initial ignition to prevent excessive engine wear. my LS430 takes a full second to a second and a half before ignition. my LS400 took almost 2 seconds before ignition.
