CAT delete issue - Ford Powerstroke Diesel Forum
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post #1 of 13 Old 06-10-2012, 04:02 AM Thread Starter
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CAT delete issue

Last week I deleted the CAT and replaced it with the MBRP 4" SS delete pipe. Yesterday when taking off from a stop light I had a poping sound from under the truck. My first thought was transmission because the truck jerked a little, but after hearing it a few times it seems to be the exhaust. Almost like a backfire. Any thoughts?

Thanks,
Rick

2006 F250 King Ranch FX4 - (Build date Sept. 2005)
6.0L (Engine Build date Sept. 21 2005)
Dark Copper w/ Beige accent
Short Bed, Crew Cab, Sun Roof, Power Rear Window
18" KR wheels, Camper Package, Tow Command

Mods: Shaker 500 Stereo, Alpine MRV-F450 amp, Infiniti Speakers, Line-X, Edge Insight CTS w/pryo, Mag-Hytec Differential Cover, MBRP 4" Turbo Back Exhaust, Diesel Site Coolant Filter, Blue Spring upgrade, Fleetrite ELC, Fuel Pressure Guage, NCHornet CCV Mod, Swamps 58v FICM
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post #2 of 13 Old 06-10-2012, 04:09 AM Thread Starter
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This happened under medium to heavy acceleration. Also, no smoke that I could see, and it didn't seem like an overboost.

2006 F250 King Ranch FX4 - (Build date Sept. 2005)
6.0L (Engine Build date Sept. 21 2005)
Dark Copper w/ Beige accent
Short Bed, Crew Cab, Sun Roof, Power Rear Window
18" KR wheels, Camper Package, Tow Command

Mods: Shaker 500 Stereo, Alpine MRV-F450 amp, Infiniti Speakers, Line-X, Edge Insight CTS w/pryo, Mag-Hytec Differential Cover, MBRP 4" Turbo Back Exhaust, Diesel Site Coolant Filter, Blue Spring upgrade, Fleetrite ELC, Fuel Pressure Guage, NCHornet CCV Mod, Swamps 58v FICM
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post #3 of 13 Old 06-10-2012, 04:22 AM
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I would see if anything is loose or bouncing against something

I made my Samsung SGH-I997 send this.



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
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post #4 of 13 Old 06-10-2012, 04:49 AM Thread Starter
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I just took it for a test drive, I can't identify what the issue is. It doesn't do it everytime, but I can feel the stumble in the peddle. I can already be doing 50mph before it starts. I let off the peddle a little bit and it stops most of the time. It never lasts very long.

I check the exhaust, everything seems tight.

2006 F250 King Ranch FX4 - (Build date Sept. 2005)
6.0L (Engine Build date Sept. 21 2005)
Dark Copper w/ Beige accent
Short Bed, Crew Cab, Sun Roof, Power Rear Window
18" KR wheels, Camper Package, Tow Command

Mods: Shaker 500 Stereo, Alpine MRV-F450 amp, Infiniti Speakers, Line-X, Edge Insight CTS w/pryo, Mag-Hytec Differential Cover, MBRP 4" Turbo Back Exhaust, Diesel Site Coolant Filter, Blue Spring upgrade, Fleetrite ELC, Fuel Pressure Guage, NCHornet CCV Mod, Swamps 58v FICM

Last edited by ralderman; 06-10-2012 at 04:50 AM. Reason: added info
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post #5 of 13 Old 06-10-2012, 04:58 AM
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If it truly is a performance issue, maybe check your ebps and tube.
maybe it's leaking and had plenty of back pressure with the cat. Now it doesn't have a lot, which is good. But maybe the ebps is seeing little and is having issues?

I made my Samsung SGH-I997 send this.



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4R100, 2wd
330,000 + miles
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post #6 of 13 Old 06-10-2012, 06:36 AM Thread Starter
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It doesnt feel like a performance issue, the truck still pulls solid. My dad is sending my AutoEnginuity software back, I should have it in a few days. I'll check the sensor output. I may clean it after just to see if there is a difference.

I just checked my CCV reroute and has some slack in the supply line so I fixed that. It shouldn't make a difference, but just checking a few things on the truck. I also did a drain and refill on the transmission and changed the external filter. I did a flush and changed both filters about a year and half ago.

From reading about the EBP, it could be the cause, and does make sense. Anyone know what the sensor should read normally?


Thanks,
Rick

2006 F250 King Ranch FX4 - (Build date Sept. 2005)
6.0L (Engine Build date Sept. 21 2005)
Dark Copper w/ Beige accent
Short Bed, Crew Cab, Sun Roof, Power Rear Window
18" KR wheels, Camper Package, Tow Command

Mods: Shaker 500 Stereo, Alpine MRV-F450 amp, Infiniti Speakers, Line-X, Edge Insight CTS w/pryo, Mag-Hytec Differential Cover, MBRP 4" Turbo Back Exhaust, Diesel Site Coolant Filter, Blue Spring upgrade, Fleetrite ELC, Fuel Pressure Guage, NCHornet CCV Mod, Swamps 58v FICM
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post #7 of 13 Old 06-10-2012, 06:37 AM
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Check clearances around the pipe. It can be close to the crossmember or the body at times.
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post #8 of 13 Old 06-11-2012, 04:13 PM Thread Starter
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F250sixOh, great troubleshooting. I think that was part of my problem. The rear hanger was tapping the metal bracket next to the spare tire.

2006 F250 King Ranch FX4 - (Build date Sept. 2005)
6.0L (Engine Build date Sept. 21 2005)
Dark Copper w/ Beige accent
Short Bed, Crew Cab, Sun Roof, Power Rear Window
18" KR wheels, Camper Package, Tow Command

Mods: Shaker 500 Stereo, Alpine MRV-F450 amp, Infiniti Speakers, Line-X, Edge Insight CTS w/pryo, Mag-Hytec Differential Cover, MBRP 4" Turbo Back Exhaust, Diesel Site Coolant Filter, Blue Spring upgrade, Fleetrite ELC, Fuel Pressure Guage, NCHornet CCV Mod, Swamps 58v FICM
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post #9 of 13 Old 06-11-2012, 04:14 PM Thread Starter
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Now I have some type of intermittent grinding noise. I think it's in the front.

2006 F250 King Ranch FX4 - (Build date Sept. 2005)
6.0L (Engine Build date Sept. 21 2005)
Dark Copper w/ Beige accent
Short Bed, Crew Cab, Sun Roof, Power Rear Window
18" KR wheels, Camper Package, Tow Command

Mods: Shaker 500 Stereo, Alpine MRV-F450 amp, Infiniti Speakers, Line-X, Edge Insight CTS w/pryo, Mag-Hytec Differential Cover, MBRP 4" Turbo Back Exhaust, Diesel Site Coolant Filter, Blue Spring upgrade, Fleetrite ELC, Fuel Pressure Guage, NCHornet CCV Mod, Swamps 58v FICM
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post #10 of 13 Old 06-11-2012, 06:32 PM
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Quote:
Originally Posted by ralderman View Post
F250sixOh, great troubleshooting. I think that was part of my problem. The rear hanger was tapping the metal bracket next to the spare tire.
: ahem. I think I posted that first



2000 F-350 Lariat Super Duty, Dually, CCLB, 7.3L
4R100, 2wd
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