exhaust manifold leak / sputtering ??? - F-Series & SuperDuty Diesel Forums

surreyboy · 12-17-2011, 03:26 PM

Hey every one , I have a 97 f250HD 7.3L , 4x4 , 5spd . I'm thinking I might have the beginning of an exhaust leak , how would I determine this , or confirm this ? The engine is to loud to listen

Another question I have is with sputtering as I accelerate ? It only happens at low rpms ?
Could it maybe be the injectors ???

Thanxs !!!

tankerdude · 12-18-2011, 03:13 PM

If you have "the beginning" of an exhaust leak, and you can't hear it 'cuz of the engine noise, then you're going to have to wait it gets bad enough to show some black soot on the surrounding parts.

Inspect every inch of the exhaust system, looking at surrounding components for black soot. The presence of the soot would indicate a leak in the system.

Sometimes, using a small metallic object, like a small socket, to tap on the exhaust system (engine is off) will produce a sound that is noticeably different when you've found a crack or a loose joint.

94f450sd · 12-19-2011, 04:13 AM

If you cant hear it why do you think you have a leak? Has a hissing noise? Can you smell it? What do mean by sputtering? Just low on power here and there? And did all this start with the cold weather?

surreyboy · 12-25-2011, 07:10 PM

well the motor just seems to sound a bit louder than normal i guess , the thought popped in my head that its starting to pass by ?? maybe its nothing ?? the sputtering i just recently noticed , it has 370,000 kms i was thinking maybe dirty or bad injector(s) ?? i do run injector cleaner in it but after that many KMS things . how can i tell if injectors are bad or dirty ? im also running a evolution cs

thankx !!

94f450sd · 12-26-2011, 01:51 AM

On the compressor side of the turbo there is a black connector bolted to the compressor housing just under the intake boot.unplug it and see what happens.

surreyboy · 12-26-2011, 09:52 AM

I'm away from the truck for another week , I will unplug the connector to see how it runs but just out of curiosity , what is the connector & what is its function ?

Thanx !

Stroked68 · 12-26-2011, 12:37 PM

One big indicator is smelling it. Also soot spots. You might be able to shine a flash light on the suspected areas and have someone rev it up. Might show somethin.

94f450sd · 12-27-2011, 06:40 AM

Quote:

Originally Posted by surreyboy

I'm away from the truck for another week , I will unplug the connector to see how it runs but just out of curiosity , what is the connector & what is its function ?

Thanx !

Its for the exhaust back pressure valve.most complaints about low power, exhaust leak and a couple other issues when it starts to get cold are caused by the ebpv.it is normal but we need to rule it out before looking elsewhere.you can also leave it unplugged.won't hurt anything and won't set a CEL.can also gut it if you want.you dont need it.all it does is close the exhaust to force the motor to warm up faster.most people find its more of a pita than its worth.

12-17-2011, 03:26 PM	#1
surreyboy SDD Member Join Date: Nov 2009 Location: alberta canada Posts: 54 Thanks: 4 Thanked 0 Times in 0 Posts	exhaust manifold leak / sputtering ??? Hey every one , I have a 97 f250HD 7.3L , 4x4 , 5spd . I'm thinking I might have the beginning of an exhaust leak , how would I determine this , or confirm this ? The engine is to loud to listen Another question I have is with sputtering as I accelerate ? It only happens at low rpms ? Could it maybe be the injectors ??? Thanxs !!!

12-18-2011, 03:13 PM	#2
tankerdude SDD Member Join Date: Nov 2011 Location: Tulsa, Ok Posts: 69 Thanks: 2 Thanked 6 Times in 5 Posts	If you have "the beginning" of an exhaust leak, and you can't hear it 'cuz of the engine noise, then you're going to have to wait it gets bad enough to show some black soot on the surrounding parts. Inspect every inch of the exhaust system, looking at surrounding components for black soot. The presence of the soot would indicate a leak in the system. Sometimes, using a small metallic object, like a small socket, to tap on the exhaust system (engine is off) will produce a sound that is noticeably different when you've found a crack or a loose joint. __________________ 2005 F350 King Ranch CC LB 4x4 Firestone Ride-Rite air bags Bilstien shocks EDAS from Powerstrokehelp.com. High Idle Mod Pulling a 2008 Jayco Recon ZX 37U. RV having fun yet?

12-19-2011, 04:13 AM	#3
94f450sd certified nutjob Join Date: Oct 2005 Location: plymouth,ma Posts: 2,275 Thanks: 23 Thanked 27 Times in 26 Posts View Photos By: 94f450sd	If you cant hear it why do you think you have a leak? Has a hissing noise? Can you smell it? What do mean by sputtering? Just low on power here and there? And did all this start with the cold weather? __________________ RICH my pictures 95 F350 XLT,automatic,CC,dually 2WD,fully loaded.,328,000miles.Dana HD70 rear with 4.10 gears,trans temp,pyro,and boost gauges on the pillar.3" down pipe.TS 6 pos.chip with the crazy TWILDMAN programs!!,.intercooled,DIY tymar,monsterbox E4OD, BDP stage 2s,BDP fuel system,stealth HPOP from BDP powered by,Beans diesel performance old best,15.340@86.93MPH new best,15.079@91.53MPH 367HP,not running 100% poor mans onboard air,wannabe train horns and hadleys on the roof 72 pontiac lemans GT37 Last edited by 94f450sd; 12-19-2011 at 04:15 AM.

12-26-2011, 01:51 AM	#5
94f450sd certified nutjob Join Date: Oct 2005 Location: plymouth,ma Posts: 2,275 Thanks: 23 Thanked 27 Times in 26 Posts View Photos By: 94f450sd	On the compressor side of the turbo there is a black connector bolted to the compressor housing just under the intake boot.unplug it and see what happens. __________________ RICH my pictures 95 F350 XLT,automatic,CC,dually 2WD,fully loaded.,328,000miles.Dana HD70 rear with 4.10 gears,trans temp,pyro,and boost gauges on the pillar.3" down pipe.TS 6 pos.chip with the crazy TWILDMAN programs!!,.intercooled,DIY tymar,monsterbox E4OD, BDP stage 2s,BDP fuel system,stealth HPOP from BDP powered by,Beans diesel performance old best,15.340@86.93MPH new best,15.079@91.53MPH 367HP,not running 100% poor mans onboard air,wannabe train horns and hadleys on the roof 72 pontiac lemans GT37

12-26-2011, 12:37 PM	#7
Stroked68 This is FORD Country Join Date: Apr 2010 Location: Eudora, KS Posts: 945 Thanks: 11 Thanked 64 Times in 63 Posts View Photos By: Stroked68	One big indicator is smelling it. Also soot spots. You might be able to shine a flash light on the suspected areas and have someone rev it up. Might show somethin. __________________ 1999 Ford F250 Superduty 4x4 sb ext cab 7.3L DIY Intake-MBRP 4" turbo back smokers kit with dual 6" Miter stacks-Autometer UltraLite Triple pillar gauge KMC HPX SS Crossover Line-Shimmed FPR 74-75psi AIH delete-ZooDad Mod-08 rear diff cover-Harpoon mod-Hutch mod-Recon LED smoked cab lights Bed liner on bottom 1/4 of truck-Fumoto drain valve 275k and counting!

12-25-2011, 07:10 PM	#4
surreyboy SDD Member Join Date: Nov 2009 Location: alberta canada Posts: 54 Thanks: 4 Thanked 0 Times in 0 Posts	well the motor just seems to sound a bit louder than normal i guess , the thought popped in my head that its starting to pass by ?? maybe its nothing ?? the sputtering i just recently noticed , it has 370,000 kms i was thinking maybe dirty or bad injector(s) ?? i do run injector cleaner in it but after that many KMS things . how can i tell if injectors are bad or dirty ? im also running a evolution cs thankx !!

12-26-2011, 09:52 AM	#6
surreyboy SDD Member Join Date: Nov 2009 Location: alberta canada Posts: 54 Thanks: 4 Thanked 0 Times in 0 Posts	I'm away from the truck for another week , I will unplug the connector to see how it runs but just out of curiosity , what is the connector & what is its function ? Thanx !

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