As an extension to the other thread about noises from a V10, now that I think of it, I've had a new issue come up lately beyond the unusual noise my V10 has had the entire time I've had it.

It still runs fine, and when it's cold, everything is normal. However, if I've gone somewhere and it had some time to cool down, when I go to leave, it makes a sputtering noise. It was doing it every few weeks before, but now it is happening more frequently, basically every time such situation happens.

I'm having a very hard time describing it. I've taken my parents for a ride, and they both claim they can't hear anything. Again, like the rest of the unusual noises, it has no effect on performance whatsoever. I'm hearing it louder now with the new tires, since they are much quieter.

Watch the following video. It exaggerates it a lot, but the type of sound is similar. The only difference is mine makes this type of noise when accelerating and it does NOT make it at idle: '79 Ford sputtering sound - YouTube

I relate the sound a lot to the sound of an older Mercury Villager. It seems like I've seen/heard some of those around on the road making a sputtering noise like that when driving, but I can't find a video of one doing it.

That being said, the noise goes away after one or two accelerations, or I suppose after the engine has resumed full operating temperature.

Some key variables:
- New Motorcraft plugs have about 43k on them.
- New coils (Accel Supercoils) have about 15k on them.
- New fuel filter about 13k ago (Fram :/ )
- New serpentine belt about 19k ago (Gates)
- New reman alternator about 1k ago.
- The A/C system had been making a sputtering type noise of its own when the A/C clutch was engaged this summer. I have not worked on the system beyond reducing the clutch gap which didn't fix it, but I've just shut it off and let it be. It makes this noise with the A/C system off. The system still cools, so I've let it go.

I recently removed the front left plug and coil to do an inspection. While I had it out, I checked the plug gap, and it was still perfectly at the spec which I believe is .054" if memory serves. I didn't check any of the others, just that one.

Any ideas are greatly appreciated.

 

Exhaust leak? Have you looked at the exhaust manifold bolts to see if they have rusted away?

 

Jon, does it sound like maybe an exhaust heat shield vibrating ( tinny)?

If so, can be a heat shield or even the trans. Inspection plate.
Both easy fixes and both are common problems with the V10 ex's.

 

Check your idle mixture and is your choke working correctly? Does the engine have any off idle hesitations? I'll take a stab and say that it's lean since a cool intake allows it to run rough but goes away when warm (operating temp). When adjusting the idle mixture, make sure the intake is good an warm, 20 minutes of driving before you adjust anything. The first rule is that each mixture screw does not need to have the same number of turns as the other. Each barrel potentially sees a slightly different signal than the other but not necessarilly. Find a port to hook up a vac gauge, make sure you feel it pulling vacuum at idle. Basically you're looking for highest vac at your desired idle speed. If you do have an off idle hesitation, then you may need to to more work to get back on the transfer slot. Make sense? I tried to give a quick over view, let me know where I wasn't clear.

 

Re-read the post. He's talking about the V-10 in his excursion. The video he posted is just an example of the noise.

 

Thanks, that explains why I was confused by the subject line.

 

Ok, well thanks for the very nice explanation of how to adjust a carburetor! I think I will copy it and repost over on my vintage jeep club website.

.

 

I hope it helps someone but that being said, it's possible the idle air bypass needs a good cleaning on the V10 or the throttle blades may be sludged. That can cause changes in idle quality.

 

Hi guys,

Thanks for the responses. Sorry if this sounds brief, I'm doing this from my phone. It isn't a tinny heat shield noise and it isn't the inspection plate. I had that inspection plate off already and tightened it real good and checked it by tapping a hammer on it.

It could be the exhaust manifold, but I did look at it when I looked at the plug/coil and it really wasn't rusty, but granted I didn't actually check the bolts.

 

It's got a hot cam in it!

 

I just bought a 2000 v10 and heard the exact same thing. if the truck is cold, and you start it, and pull away, to me, it sounds exactly like a blown manifold gasket....give it a little more gas and it makes a squeal similar to a belt squeel, but more like a vaccum leak.

it only does it when cold, idling for 1-2 minutes causes it to not happen.

real PITA to diagnose since you only have seconds to find it.

im thinging its a leak in the air intake?? but im just thinking.....

 

Hmm, mine isn't when it's completely cold though, maybe if the coolant cools down to 140-150? and the trans 90-100? It doesn't do it when really cold, like current air temp cold.

 

?? Please explain.

 

wierd. Im getting ready to leave for a hockey game, i'll see if i can record it with my phone so we can see if its the same.

 

Just kidding, we need the actual sound from the V-10 and even that could be many things.