02 LB7 really PI$$!NG me off! No power!

[Stevenmc89]

I have an 02 lb7 that I've been trying to fix a lost power issue for a couple weeks and nothing! Well today after messing with it I got mad and run the hell out of it on the way to work and bam it started running PERFECT for about 10 minutes then I stopped at the store and when I came back out and left it had no power once again!

What I've do so far: new fuel filter, cleaned MAF sensor, run the recommended amount of power service in this last tank of fuel and nothing helped. It has newer injectors with good balance rates and a 6 month old cp3. No grey smoke, fuel in oil, or anything out of the ordinary. It has a predator programmer, factory straight pipe, and cold air intake. It's a cheap eBay intake that the original owner put on with a K&N filter i put on it 2 months ago and I've had problems with the filter falling off about 3 times! Do any of y'all have any suggestions? Maybe bad fuel? Dirt or something in the turbo from that cheap pos intake and the filter falling off? It has no cel or codes except p0380 for glow plugs so i don't know which direction to look. I also don't see any fuel or boost leaks and don't understand why when I ran the hell out of it the power came back for a little while.

[01 D_Max]

I am thinking that intake is throwing off the MAF sensor. Or you need to replace the MAF sensor. Running it hard must have spooled the turbo enough, or sucked in enough air to tell the ecm that you need more fuel. That gave you the power back. This is just my theory.

[Thebiggids]

Oiled air filter? Do you have a scanner to read the lbs/min the MAF is reading?

[Thebiggids]

It is very typical of a bad MAF to act horrible then all of a sudden you have a big burst of power. Leads me to believe bad MAF.

[Stevenmc89]

It's an oiled K&N ( I know bad mistake) and my predator can read it. It's between 44 at the lowest and 50 something on idle and I wanna say 150-160 while cruising? I can't exactly remember off the top of my head. I just don't get how it ran fine for 2 months then after 2 weeks of no power I give it hell and it runs like new again for a few minutes then bam back to no power.

[bigjohn]

Man that sucks . Sounds like it would be the MAF sensor. Hopefully that the fixed your problem.

[Stevenmc89]

I'm to the point where I've had about all this acting up crap I can take with this truck and if someone can point me in the right direction and help me find what's wrong with it I have no problem paying you. Whoever helps me find the problem I'll send a tip threw PayPal or just mail you cash! I'm ready to have this thing back to normal and don't wanna have to pay the stealer $100 to find the problem!

[Thebiggids]

Do you still have the oem intake? It would be awesome if you could swap it back on. Does it blow a lot of black smoke?

[Stevenmc89]

If I had the oem intake it would have been on there a long time ago. I bought the truck from a good friend and it had the eBay one on it when he got it so there's no telling where it is. All I did was put the filter on it. Do you know what the MAF rates are supposed to be and yea it does smoke pretty good. It's got 120 tune on it so I'm sure a lot of the smoke is from that

[01 D_Max]

You may wanna check your innercooler tube on the drivers side and see if that has a hole the size of your finger in it. Sometimes it rubs through. It will smoke more and you will lose power. But thats just a possibility. I really think it's your MAF sensor issue.