Zoran,

I was wondering how your problem is going? I just thought that I would tell you that I TOO noticed that the truck just didn't have that SNAP!!! I figured out what my problem was. The air filter was a little dirty on the edges and it was being sucked closed!!! I saved the old one and will post pics later.

The truck has been "struglin" lately. I noticed that the power was getting less and less. The truck has less then 6,000 miles on it. When I stomp on it, it just didn't throw you back in your seat. So I got a NEW motorcraft air filter, put it iin at the dealership, and drove home. I stopped in the next town at the advance auto parts. Picked up some Lucas fuel injestor cleaner, put it in and drove home. Today I went to the dealer and had the fuel filter changed. Everything I did made the truck FASTER..... With the air filter the supercharger whine became louder, with the injector cleaner the throtle response got better. And with the fuel filter the throtle response became insane.

I just thought this may help, my truck is 100% stock. I think that you have already looked at these things, but I figured I would share my experince.

 

crockett59 thanks for sharing your experience. I haven't really noticed a power loss and I have almost 12,000 on mine. However, as soon as it quites raining I will look at the air and fuel filter.

Mine is stock, except for a chip and I ride it pretty hard. I saw on another thread that the filter is a big issue and that some guys change it on every oil change.

 

crockett59, nice to hear from you. As you are probably guessing, I am not having fun (you can read some more in my other threads both on this and 'other F150 board'). In addition to that I have hell of a time in my personal life (everything around me is crashing down), but I better not go into that.

I am sorry you noticed it too, but I am glad you resolved it. Both your and my truck started "struggling'/'laboring' at approximately 6K miles. 02 Hog also reported loss of boost on his, but I did not hear from him back when I asked him what is status of it. I don't know his mileage, but I think it is between 5K to 10K. Hmmmm, this sounds very close to a pattern forming, doesn't it?

I did think along same lines and checked air filter 3 days ago. Amount of dirt was small, but I changed it none the less. That did not result in any improvement for me. I am still interested to see pics of yours and see area where it was shutting close, so I can doublecheck mine. I am actually tempted to doublecheck complete air intake (MAF, everything).

Do you happen to know what is Ford's attitude about using that. I know they are against fuel additives (I need to find that area of manual again), but what about cleaners?

I did not do fuel injector cleaning. I did change fuel filter though. Even though 1st service (Ford of Montebello) told me they checked fuel filter and that it is OK, even though 2nd service (Galpin Ford) said they checked fuel delivery among other things and that it is OK, 3rd service (independent one this time) checked fuel filter and it was badly congested. That did improve things a nice amount, but not completely. Oh, and it seems that after I have done fuel filter change problems with starting that appeared at 5K miles are now gone (might be too soon to tell).

What did make big change for me though is boost solenoid. I have disconnected it temporarily and I got big improvement (not 100% of what it used to be before, but still quite a chunk). What is weird though is that improvement remained after I have connected solenoid back (it was off very briefly). This could have happened if (again, I know nothing about how engines work) solenoid has bad contact, solenoid itself is bad, extra pressure removed part of clog somewhere or opened something that was stuck before, there is some issue with valve, or there is issue with computer or whatever leading to it.

This all leads me to believe that whatever I have is related to more than one component that play role in generation fo power. Why I say more than one? Because other symptoms I had related to lack of supercharger whine indicate potential signs of belt slipping.

You definitely help and I appreciate a lot effort you and others are investing to help me out.

If I were you I would keep that truck stock little longer. My rule of thumb for anything I own is that I don't touch it in any way during first 50 to 70% of the warranty period spawning across two winters and summers. If problems did not pop up during that time product is very probably problem free.

As far as mine goes, I will be doing few "mods" on it very soon. To be precise, I will be putting some gauges (boost, fuel pressure, air/fuel ratio, water temperature, any suggestions what else?) that should help me in troubleshooting issues I have.

Thanks for keeping me in mind! I wish you and your beloved ones very happy holidays and happy New Year!

ZoranC

 

crockett59,

Guess what. Put fuel injector cleaner in today, drove it for 20-30 miles and I can feel some improvement. Once this tank is empty (right now it is 3/4 full) I will repeat fuel injector treatment one more time and see how well it runs after that tank is gone.

Truck is still not where it used to be, but all these things making an improvement prove that I have more than one thing going on and that fuel system is part of it (I will definitely check fuel pump).

Do these trucks have fuel pressure sensor somewhere? Could that one go bad?

Thanks again! Your tip was valuable!

ZoranC

 

I take this back. Had problem starting twice in last 3 days.

ZoranC

 

Since previous post I had problem starting on 4 more occasions, out of which two were today 30 minutes apart one from other. On both occassions today it took 3+ attempts to get truck started. My current tank is filled with Chevron (I wasn't anywhere near '76' when I need to fill) and it is obvious to me truck has more problems when Chevron is in it.

Does anyone have any ideas what could be at play when truck has more problems starting with one brand of gas than the other? Also, I changed oil today. Would this play any role in troubles starting?

Thanks in advance!

ZoranC