Hi there, this is going to be a bit wordy and I apologize for that.
The truck:
2005 ccsb
230k miles
4” straight pipe
Egr blocker plate
Finger stick
K&n air filter
S&w turbo mouthpiece
I’ll try to sum this up quickly:
Truck was bone stock when I installed the turbo mouthpiece; no issue.
3k miles later I installed a 4” straight pipe, and on the way home I got 2 egr codes(p0401, 0404) and a low boost code(p0299).(this resulted in limited power)
I had not planned on tuning the truck, so I bought a finger stick that came with an egr block off plate.I installed the finger stick, put the block off plate in, and sprayed my MAF sensor with MAF cleaner spray all at the same time. The next day, no more egr codes or low boost codes, but I had a MAF code(p0103), which also seemed to limit my throttle. The truck would still rev out, but had less power. It was more than driveable so I kept driving it for a couple weeks. I even tried replacing the MAF with no change.
Fast forward a couple weeks and I removed the finger stick, and got the truck tuned with an EFI live tow tune(single tune). Once tuned, it briefly threw a p0100 code, which didn’t last, then a p0102 code which didn’t stick around either. Have about 100 miles on it since then with still no code.
The truck is now much more responsive, but once it hits that certain throttle/boost/something, it still just cuts power and only seems to allow roughly 50-60% throttle.
Here’s the tricky part: when I first start the truck, whether it’s from overnight or a couple hours, it will boost HARD and pull like a freight train. Like clockwork, after 2-3 miles of driving, it starts falling on its face again. Will drive like a brand new truck all day long, but if you give it a little too much throttle, it spools up and pulls hard for 1/2 a second, then the smoke and power immediately cut out at the same time and it defaults to roughly 50% throttle. It’ll set you back in your seat when it originally spools then it immediately cuts power and only allows half.
Once again, if I park it for a couple hours, it’ll run perfect for the first five minutes or so, then start limiting again under hard acceleration.
My tuner also tried unplugging the MAF sensor altogether and it made zero difference, the truck still would drive like normal until you tried to accelerate at any rate slightly over driving grandma to church, and the power significantly gets cut back.
I have tried 3 different MAF sensors, 2 being new and one being original with no luck. I have replaced the fuel filter, with no luck(was hard to prime).
Truck runs perfect as far as my wife is concerned, as she never puts her foot down at all, and it will do a cross country trip with the cruise at 80 if I wanted to, but it’s just when you ask it for power, it delivers for a split second, then cuts your power back significantly.
I can order an ACDelco MAF sensor for around $350, but I wanted to get opinions before doing so, as money is right.
Thanks in advance, hope to get this figured out soon!
mitch
The truck:
2005 ccsb
230k miles
4” straight pipe
Egr blocker plate
Finger stick
K&n air filter
S&w turbo mouthpiece
I’ll try to sum this up quickly:
Truck was bone stock when I installed the turbo mouthpiece; no issue.
3k miles later I installed a 4” straight pipe, and on the way home I got 2 egr codes(p0401, 0404) and a low boost code(p0299).(this resulted in limited power)
I had not planned on tuning the truck, so I bought a finger stick that came with an egr block off plate.I installed the finger stick, put the block off plate in, and sprayed my MAF sensor with MAF cleaner spray all at the same time. The next day, no more egr codes or low boost codes, but I had a MAF code(p0103), which also seemed to limit my throttle. The truck would still rev out, but had less power. It was more than driveable so I kept driving it for a couple weeks. I even tried replacing the MAF with no change.
Fast forward a couple weeks and I removed the finger stick, and got the truck tuned with an EFI live tow tune(single tune). Once tuned, it briefly threw a p0100 code, which didn’t last, then a p0102 code which didn’t stick around either. Have about 100 miles on it since then with still no code.
The truck is now much more responsive, but once it hits that certain throttle/boost/something, it still just cuts power and only seems to allow roughly 50-60% throttle.
Here’s the tricky part: when I first start the truck, whether it’s from overnight or a couple hours, it will boost HARD and pull like a freight train. Like clockwork, after 2-3 miles of driving, it starts falling on its face again. Will drive like a brand new truck all day long, but if you give it a little too much throttle, it spools up and pulls hard for 1/2 a second, then the smoke and power immediately cut out at the same time and it defaults to roughly 50% throttle. It’ll set you back in your seat when it originally spools then it immediately cuts power and only allows half.
Once again, if I park it for a couple hours, it’ll run perfect for the first five minutes or so, then start limiting again under hard acceleration.
My tuner also tried unplugging the MAF sensor altogether and it made zero difference, the truck still would drive like normal until you tried to accelerate at any rate slightly over driving grandma to church, and the power significantly gets cut back.
I have tried 3 different MAF sensors, 2 being new and one being original with no luck. I have replaced the fuel filter, with no luck(was hard to prime).
Truck runs perfect as far as my wife is concerned, as she never puts her foot down at all, and it will do a cross country trip with the cruise at 80 if I wanted to, but it’s just when you ask it for power, it delivers for a split second, then cuts your power back significantly.
I can order an ACDelco MAF sensor for around $350, but I wanted to get opinions before doing so, as money is right.
Thanks in advance, hope to get this figured out soon!
mitch
