does any one know how to get rid of the "marble" type nosie in the upper part of the engine.. Ford decarboned the engine, but know says it is normal.. I have a 4.0L V-6, 1999 4x4... Any suggestions will be appreciated..

 

It seems to be common in some 4.0 OHV enigines and I believe it's due to the piston pin design.

 

Ken, it seems that you are right on the money. I spoke to Ford and they told me that this problem is "normal" and does not affect the performance of the vehicle. It seems that they are working on the problem... Like I believe that. This nosie can be loud at times. I wonder why the decarbonizing worked for a day or two. It seems that they used a metal which likes carbon and it builds up quickly. I wonder if I used after market pistons, if that would fix it.. I should ask Ford if they would pay for it.. My gas milage is not very good, I wonder if I get a mechanic to say that this problem is causing a performance/milage problem. Why can't Ford get it right, this is not rocket science.. I wounder what Henry Ford would say about this... I am going to ask the psyche...

 

I don't know why the de-carb worked and I don't think pistons will help.

 

I have heard that carbon buildup causes the piston to become artificially "thicker" and that this causes the compression to be much higher, causing detonation.

Try a few simple fixes first,
Make sure the engine is getting enough gas.

• A dirty fuel filter can cause bad pinging.
• If you have a metal DPFE, I would change it out. They control the EGR and are a known contributer to pinging and eventually CEL illumination for EGR flow
• EGR may be stuck closed, Clean and lube it really good with brake cleaner and some penatrant after wards
• If it still pings, give it a complete tune up with plugs and wires.

 

My 4.0L also sounds like a diesel. It's embarrassing sometimes. But it does not affect the performance of the engine. My truck is still very powerful and I get 17 miles per gallon mixed driving. I guess it's just a normal attribute of the OHV engine.

 

Sounds great, I will contact the dealer, thanks to all...wxboy, what is the secret to your gas mileage, mine does not seem to be soo good... you can e-mail me at travis@accidentcounseling.com. how many miles do you have? Also, did the blistein shocks seem to lessen the shock of the road? What model are they? I have a 4x4.. Did you use or consider any other brands? What about Rancho...

 

I bought my truck at 68,000 miles. When I bought it the gas mileage sucked. I was averaging 14.8 miles per gallon. I was very unhappy and could have been driving a full size truck if I had known it would be that bad. So after a while, I decided to do some maintenance on my truck. Rangers are supposed to go 100K before a tuneup....but I went ahead and did one on my truck. I installed new plugs, wires, air filter, and a new fuel filter at 74,000 miles. After I did that...my mileage jumped 2 miles per gallon. I am now averaging about 17 miles per gallon...and on the interstate I'm getting 20. Not bad for a 4x4 with 4.10 gears. Different trucks may have different problems, but the full tuneup cured mine. I now have 79,000 miles and still does great.

I bought my Bilstein shocks. I looked at Rancho and Trailmaster...but after doing research I read some bad things about them. So I went with Bilstein. That's what the new off-road Rangers have from the factory too. They are just slightly more stiff than the factory shocks were. I have noticed less body roll and better handling since I put them on. Sometimes I wish they weren't quite so stiff...but overall they are very nice shocks and they have a lifetime warranty. If I had to do it all over again, I would have just left the factory Ford shocks alone....the Bilsteins are great but looking back on it the swap wasn't worth the money I paid for them.

 

Thanks, I hear a tune-up in my future.. I wonder if gas adjustable shocks would solve the problem.. My truck rides like an old wooden wagon..

 

Check the air in your tires first, a lot of times that's the instigator of a rough ride.

The psi's should be inflated to what your owners manual or the white card inside the drivers door frame says.

 

I've read over at RPS that some owners have used a can of Engine Restore and it seemed to help w/ the marbling noise. I added a can at my last oil change and haven't really had time to notice if the noise is back yet.

Matt

 

Travisca...do you have the off-road package on your truck? If so, that's the reason it rides like a tobacco wagon. If you want a better ride, try the standard shocks used on the regular 4x4s. Most aftermarket companies like Rancho, Bilstein, etc. are into the off-road business as well so buying a set of them won't give you better ride quality on the highway. I wish I didn't have the off-road package on my truck. I don't need it...I just bought it for the 16" wheels basically. It definitely sacrifices ride quality on the road.

 

wxboy, I do have the off-rd package... Do you mean that I should try a car type shock? Rancho does make a shock that you can adjust to make the ride more comfortable, it runs about $100-150 + per shock... I had them on a full size chevy... They really "sucked" up the bumps.. I think the springs on these ford's give them a hard ride. Thanks for your thoughts....

 

[QUOTE]Originally posted by mwittman
[B]I've read over at RPS that some owners have used a can of Engine Restore and it seemed to help w/ the marbling noise. I added a can at my last oil change and haven't really had time to notice if the noise is back yet.



Did the Enigne restore work??? Do you add it in addition to the 5qts of oil... I had the oil changed about a week or so ago, could I still add a can??? Maybe we should ALL get together and pound Ford.. If we had 500 or more of us go to ford at the same time, with the same complaint, I'll bet they will listen.. We should ALL get mechanics to say that this problem is affecting the life and gas mileage of the engine..