question about crank...
07-20-09, 02:54 AM
#1
Lexus Champion
Thread Starter
question about crank...
I have 2004 LS430 w/ approx 75k miles... Recently it takes longer to start the car. After driving the car, restarting right away is non-issue. Usually I crank bout 2 secs and car starts, now I crank bout 4-5 secs. Doesn't make any weird noises, just takes longer time. BTW, I am using smart Key. Any ideas? Battery or starter or fuel line? Any ideas? Is this kind of common for 04 LS?
07-20-09, 04:09 AM
#2
battery is starting to get weak... have it tested...
batteries are curious animals... one day they are fine and starting the car, and the next morning you wake up to find it completely dead...
essentially, the cranking amperage of the battery starts getting weaker from day 1, and eventually gets to the point where it doesn't turn the starter as fast anymore, so it takes longer for the car to start...
batteries are curious animals... one day they are fine and starting the car, and the next morning you wake up to find it completely dead...
essentially, the cranking amperage of the battery starts getting weaker from day 1, and eventually gets to the point where it doesn't turn the starter as fast anymore, so it takes longer for the car to start...
07-20-09, 07:08 AM
#3
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http://batterytender.com/product_info.php?products_id=2
i am no mechanic but i bought two of these a couple years back and it was a great investment. especially if you have something you don't drive much during the winter. i think it prolongs the life of a battery. i don't think it will help a bad battery though.
i am no mechanic but i bought two of these a couple years back and it was a great investment. especially if you have something you don't drive much during the winter. i think it prolongs the life of a battery. i don't think it will help a bad battery though.
07-20-09, 12:45 PM
#4
The throttle bodies on these cars are also known to cake up with crap and cause the car to start slower than normal. If youre in any way mechanically inclined, you can take the plastic intake off and clean the throttle plate and bore. And id have to battery checked out too, as stated above.
07-30-09, 04:44 PM
#7
Get a decent Digital Mulitimeter. Take voltage when the car is cranking. The voltage is suppose to be at least 10V. If it's any lower than 10V, you have a battery drain problem. Also, it also depends on the weather, if it's freaking cold then it is going to take a long time to start.
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07-31-09, 07:51 PM
#8
Lexus Champion
Thread Starter
Get a decent Digital Mulitimeter. Take voltage when the car is cranking. The voltage is suppose to be at least 10V. If it's any lower than 10V, you have a battery drain problem. Also, it also depends on the weather, if it's freaking cold then it is going to take a long time to start.
Last edited by KILLERGS4; 07-31-09 at 07:55 PM.
07-31-09, 08:49 PM
#10
If you suspect that the fuel pump is the problem then you can easily determine by:
1. Pop the fuel door, open the gas cap put your ears there. Then ask someone to go inside and turn the car to Key On Engine Off. And you will listen to see if the pump is working. If you hear a whinning noise or some type of noise to prove that the pump is working, then it's not the pump.
2. Before starting the car, turn the key to Key On Engine Off, then wait for a while like a minute, then crank. If it starts right up, you got a weak fuel pump.
Hope that helps.
1. Pop the fuel door, open the gas cap put your ears there. Then ask someone to go inside and turn the car to Key On Engine Off. And you will listen to see if the pump is working. If you hear a whinning noise or some type of noise to prove that the pump is working, then it's not the pump.
2. Before starting the car, turn the key to Key On Engine Off, then wait for a while like a minute, then crank. If it starts right up, you got a weak fuel pump.
Hope that helps.
08-01-09, 02:19 PM
#11
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You state that the car take longer to start when the car has been sitting for awhile. Does the car sound like it is cranking at a "normal speed"? Or does it sound like it is cranking slower than normal? This is important, if it sounds like it is turning over at a normal speed, the battery is probably ok (but it is still a good idea to check the battery).
If the car turns over at a normal speed, chances are your fuel pressure is bleeding off while the car sits. There is a check valve in the fuel pressure regulator that is designed to hold fuel pressure in the fuel rail when the engine is not running. If the check valve developes a slow leak, the fuel pressure will bleed back into the tank. When you try to start a car that has no pressure in the rail, you have to wait till pressure builds up in the rail before it will start. If you re-start a car that has been recently shut down, (still has pressure in the rail) it will start normally.
A fuel injector could also be leaking, but this would cause other problems and since you have not stated any other symptoms, this is probably not the case.
It appears that Toyota did not deem it necessary to include a fuel pressure check port, you need a pressure gauge with the appropriate fittings (which of course, only a well equiped shop would have) to check. Keep in mind that if the check valve is leaking, it will not be a external leak. It will be leaking back into the fuel tank.
If the car turns over at a normal speed, chances are your fuel pressure is bleeding off while the car sits. There is a check valve in the fuel pressure regulator that is designed to hold fuel pressure in the fuel rail when the engine is not running. If the check valve developes a slow leak, the fuel pressure will bleed back into the tank. When you try to start a car that has no pressure in the rail, you have to wait till pressure builds up in the rail before it will start. If you re-start a car that has been recently shut down, (still has pressure in the rail) it will start normally.
A fuel injector could also be leaking, but this would cause other problems and since you have not stated any other symptoms, this is probably not the case.
It appears that Toyota did not deem it necessary to include a fuel pressure check port, you need a pressure gauge with the appropriate fittings (which of course, only a well equiped shop would have) to check. Keep in mind that if the check valve is leaking, it will not be a external leak. It will be leaking back into the fuel tank.
Last edited by GEORGE_JET; 08-01-09 at 02:22 PM.
08-05-09, 04:37 AM
#12
Lexus Champion
Thread Starter
was planning on taking the car in today, but was starting Ok today... some times it starts good, and sometimes it's slow. I definitely want to take it when it's slow, so they know what I'm talking about. As for as the sound, sounds normal, just takes longer to start (sometimes). Maybe this problem will go away? maybe not... Maybe bad batch of gasoline? Is that even possible?
08-18-09, 02:47 AM
#13
Lexus Champion
Thread Starter
If you suspect that the fuel pump is the problem then you can easily determine by:
1. Pop the fuel door, open the gas cap put your ears there. Then ask someone to go inside and turn the car to Key On Engine Off. And you will listen to see if the pump is working. If you hear a whinning noise or some type of noise to prove that the pump is working, then it's not the pump.
2. Before starting the car, turn the key to Key On Engine Off, then wait for a while like a minute, then crank. If it starts right up, you got a weak fuel pump.
Hope that helps.
1. Pop the fuel door, open the gas cap put your ears there. Then ask someone to go inside and turn the car to Key On Engine Off. And you will listen to see if the pump is working. If you hear a whinning noise or some type of noise to prove that the pump is working, then it's not the pump.
2. Before starting the car, turn the key to Key On Engine Off, then wait for a while like a minute, then crank. If it starts right up, you got a weak fuel pump.
Hope that helps.
so you want me to listen (with fuel door open) and if there is no sound, it problem with fuel pump?
and if i hear any noise coming inside the fuel door, then it's not fuel pump.
how about fuel pump relay (this is much cheaper part vs fuel pump over 300 bucks)
10-25-09, 10:11 PM
#14
Lexus Champion
Thread Starter
update...
got car diagnosed at dealership and they said 100% it's fuel pump. So I order the fuel pump and had my bro replace it. The car still starts kinda slow 4-5 sec to start, maybe small improvement than before (sounds little bit stronger, or it might be my imagination). Recently i was unable to start my car, but I was able to run A/C and all light came on... so I popped the hood and played with battery terminal, I heard like a spark, sure enough the car was able to start. Is it possible the SLOW CRANK is due to bad/worn battery terminal??? I wonder if this is possibility??
10-25-09, 10:27 PM
#15
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got car diagnosed at dealership and they said 100% it's fuel pump. So I order the fuel pump and had my bro replace it. The car still starts kinda slow 4-5 sec to start, maybe small improvement than before (sounds little bit stronger, or it might be my imagination). Recently i was unable to start my car, but I was able to run A/C and all light came on... so I popped the hood and played with battery terminal, I heard like a spark, sure enough the car was able to start. Is it possible the SLOW CRANK is due to bad/worn battery terminal??? I wonder if this is possibility??