Need help again, weird noise coming from the engine.
05-29-2018, 06:59 PM
#1
Need help again, weird noise coming from the engine.
Hi,
I need help again
My car is doing a weird noise, looks like it is coming from inside the intake manifold, but I could be wrong, It stops after 2 minutes that the car is on.
Also the 1st time I start the car, it is a little bit hard to start, If I try to start, I will need to crank it for 5s so it starts BUT if I crank for 2s, turn it off and crank again it will start as normal.
So far what I did trying to fix the problems:
1-Changed the spark plugs for new ones, the ones that were in the car are ok, but the gap was wrong, the new ones have the correct gap.
2-Changed oil
3-Checked the oil separator, the diaphragm is ok, cleaned and put it back together.
4-Removed the throttle body, cleaned and changed gasket
5-Plugged a diagnostic tool to see if I could find any problems, no problems found, no misfires...
Videos showing the problem:
My car:
video I found on youtube with the same problem:
Any Idea what is happening?
My car has 60k miles.
Thanks in advance.
I need help again
My car is doing a weird noise, looks like it is coming from inside the intake manifold, but I could be wrong, It stops after 2 minutes that the car is on.
Also the 1st time I start the car, it is a little bit hard to start, If I try to start, I will need to crank it for 5s so it starts BUT if I crank for 2s, turn it off and crank again it will start as normal.
So far what I did trying to fix the problems:
1-Changed the spark plugs for new ones, the ones that were in the car are ok, but the gap was wrong, the new ones have the correct gap.
2-Changed oil
3-Checked the oil separator, the diaphragm is ok, cleaned and put it back together.
4-Removed the throttle body, cleaned and changed gasket
5-Plugged a diagnostic tool to see if I could find any problems, no problems found, no misfires...
Videos showing the problem:
My car:
video I found on youtube with the same problem:
Any Idea what is happening?
My car has 60k miles.
Thanks in advance.
05-30-2018, 09:10 AM
#2
RL Community Team
Rennlist Member
Rennlist Member
Couple ideas... Open and close the driver's door a few times (3 or 4) before trying to start the car. Opening the door primes the fuel pump and you should be able to hear it activate for a few seconds each time you open the door. If you hear it and after doing that the car starts fine, you might have the start if a fuel pump issue. I don't know if there's an anti-drain back valve in the system, but if so, it might be letting the lines lose their prime, but activation the pump a few times before the first start should overcome that for diagnostics.
You may also have 2 fuel pumps. With the tank 3/4 full you can pull the fuse for 1 pump and see how the car starts and runs, then put that fuse back in and pull the fuse for the other pump and test again. If you have 2 pumps and one us bad or going bad, that should isolate it.
You may also have 2 fuel pumps. With the tank 3/4 full you can pull the fuse for 1 pump and see how the car starts and runs, then put that fuse back in and pull the fuse for the other pump and test again. If you have 2 pumps and one us bad or going bad, that should isolate it.
05-30-2018, 02:21 PM
#3
Banned
Join Date: Mar 2011
Location: Spring Lake, NJ, US of A
Posts: 10,085
Received 1,144 Likes
on
759 Posts
At least on the 958 series - the pumps only prime once in 15 minutes. Opening the door repeatedly has no effect on that. There are 2 pumps in the tank on all the 955/957 series vehicles, and there are actually several check valves built into the fuel filter (top of the tank) and the fuel pressure regulator - the top on the other side of the tank.
05-30-2018, 04:03 PM
#4
RL Community Team
Rennlist Member
Rennlist Member
At least on the 958 series - the pumps only prime once in 15 minutes. Opening the door repeatedly has no effect on that. There are 2 pumps in the tank on all the 955/957 series vehicles, and there are actually several check valves built into the fuel filter (top of the tank) and the fuel pressure regulator - the top on the other side of the tank.
05-31-2018, 10:27 PM
#6
I did try this, but I could only hear the pumps the first time I got in the car. Will try again with more time.
The battery voltage is 12.2V only, so that could be the reason, I will probably buy a new battery.
But I'm more worried about the noise that you can hear every 7 seconds when the engine is cold.
The battery voltage is 12.2V only, so that could be the reason, I will probably buy a new battery.
But I'm more worried about the noise that you can hear every 7 seconds when the engine is cold.
05-31-2018, 10:40 PM
#7
Burning Brakes
+Anton Klein I had the same problem since I own my 2004 3.2 V6... And one Renntech member (thanks him) find the problem and it take about 5-10 mins to fix it. Go to the vw dealer and order the upper hydrolic timing chain tensioner (same as the touareg 3.2). In canada I paid about 60$ but probably cheaper in usa. Make sure your car and engine is not moving and put the handbrake. If you face the car on your left side from the top of the engine put your hand just over the cat (make sure engine is cold) and you will touch but not see a 27mm hexagonal bolt. Take a ratchet and extension remove old tensioner (few drops of oil will drop) take the new one soak in it in oil and put it back slowly and tight it. At the first 3-4 engine restart you may hear knocking noice, probably the computer need to adjust. I made it this week, I can provide you the part number if you want. I have video showing exactly (before) the loud noise and at 4250 rpm and up engine running smoothly. It also fix the knocking during warmup. Even Porsche dealer where not able to find the problem, thanks to Renntech.
Trending Topics
05-31-2018, 11:27 PM
#8
I thought about ordering that part: http://amzn.eu/39cmfdH
But if you read the guys reply, you will see that he changed this and it didn't fix the issue.
But if you read the guys reply, you will see that he changed this and it didn't fix the issue.
06-02-2018, 07:37 AM
#10
06-02-2018, 05:16 PM
#11
Burning Brakes
I did try this, but I could only hear the pumps the first time I got in the car. Will try again with more time.
The battery voltage is 12.2V only, so that could be the reason, I will probably buy a new battery.
The battery voltage is 12.2V only, so that could be the reason, I will probably buy a new battery.
Also, no battery is going to maintain a perfect 12.6 volt charge after a few days of non use (or short trips) in a vehicle like a Cayenne.
06-03-2018, 09:23 PM
#13
RL Community Team
Rennlist Member
Rennlist Member
