EXhaust tone changes while cold idling - Ford Powerstroke Diesel Forum
 
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post #1 of 8 Old 11-28-2010, 03:29 PM Thread Starter
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EXhaust tone changes while cold idling

I have been looking for a truck for the past little while and I looked at this one today that I liked but... It was already started when I got there and the guy said it hadn't been running long and from the looks of of it I belived him. It seemed to idle fine but the exhaust would changed tones every second or so and sounded like the ebpv was opening and closing. He said it was just the exhaust valve. I know that the ebpv can get clogged but I didn't know if this was what it sounded like.
After a couple minutes it started to idle constant and when I took it for a drive it drove nice and had plenty of power.

Any ideas on that idle tone change?

Thanks guys

99 X-cab short bed, lifted, 325/60/18, gauges, ts 6pos, dynomax race muffler, diy intake, ddm 6000k hids, custom prerunner stuff...

vvvv TOWS THE vvvv
1994 Toyota class 7 desert truck
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post #2 of 8 Old 11-28-2010, 08:08 PM Thread Starter
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So after doing research and watching videos it sounds like the ebpv is opening and closing every second or so... Not sure what causes this. Does the valve need to be cleaned? Does the tube need to be cleaned? Is the sensor toast?

Can I just unplug the electrical connector for the ebpv and not use it?

99 X-cab short bed, lifted, 325/60/18, gauges, ts 6pos, dynomax race muffler, diy intake, ddm 6000k hids, custom prerunner stuff...

vvvv TOWS THE vvvv
1994 Toyota class 7 desert truck
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post #3 of 8 Old 11-28-2010, 08:10 PM
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What year model? My brothers truck does this when the motor is cold. His is a 99 7.3. My guess is that this opening and closing of this valve helps to heat the motor quicker?

2002 Lariat 7.3 4x4-- 250,000 miles

Mods:
K&N Intake w/ Napa 6637
Banks Big Hoss Chip---Switching to Custom ASAP
Banks Monster Exhaust
Isspros in Pillar---Pyro,Trans,Boost

Upcoming:
Harley Front End Conversion
Smoked Cab Lights
Wheels/Tires
TrailReady Bumper
6.0 Trans Cooler
Garrett 38r
Hybrids
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post #4 of 8 Old 11-28-2010, 08:38 PM Thread Starter
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This truck is a late 99

99 X-cab short bed, lifted, 325/60/18, gauges, ts 6pos, dynomax race muffler, diy intake, ddm 6000k hids, custom prerunner stuff...

vvvv TOWS THE vvvv
1994 Toyota class 7 desert truck
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post #5 of 8 Old 11-29-2010, 06:25 AM
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Yea then I believe it's normal for that year model.

2002 Lariat 7.3 4x4-- 250,000 miles

Mods:
K&N Intake w/ Napa 6637
Banks Big Hoss Chip---Switching to Custom ASAP
Banks Monster Exhaust
Isspros in Pillar---Pyro,Trans,Boost

Upcoming:
Harley Front End Conversion
Smoked Cab Lights
Wheels/Tires
TrailReady Bumper
6.0 Trans Cooler
Garrett 38r
Hybrids
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post #6 of 8 Old 11-30-2010, 05:37 PM Thread Starter
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Anybody else want to confirm or deny that this phenomenon is normal for a late 99 7.3?

99 X-cab short bed, lifted, 325/60/18, gauges, ts 6pos, dynomax race muffler, diy intake, ddm 6000k hids, custom prerunner stuff...

vvvv TOWS THE vvvv
1994 Toyota class 7 desert truck
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post #7 of 8 Old 11-30-2010, 06:18 PM
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it's normal.

Early 1999 F-250, ext. cab. long bed, 6-speed, 4x4, 4" exhaust-straight , AFE stage 2 intake, 33" BFG AT'S, 3:73 rear, DP Tuner, Isspro Gauges.

03 F-250, ext. cab. long bed, 6-speed, 4x4. 18,000 miles. All stock
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post #8 of 8 Old 11-30-2010, 06:24 PM
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I own a late 99 and I can say that mine does not do this.
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