Sounds like a huge air leak, no power comes and goes

Hi:

I'm new to the site. Just bought a 97 E-350 with the 7.3L and Quigley 4x4 conversion. First diesel I've owned, but I used to drive a GM Diesel for work back in the mid 80s.

Anyway, warmed the truck up the this morning while I loaded up, at least 5 min.
Moved it across the street with no problem, left it running.

Pulled away from the curb and it was making a huge air leak noise, sounds like it is on the passenger side of the engine cover.

No power, so drove a 1/2 mile loop around the neighbourhood. Got close to the house and it seemed to correct it self. Drove another 1/2 mile and it started to do it again.

I'm new to diesel and turbo vehicles but I'm guessing that it is an exhaust leak, maybe a sticking waste gate?
Any other things I should be looking at?

Thanks for any help for the new guy!

Have a great holiday!

It's most likely the waste gate, not sure wy it closed again. Check the Inter cooler boots just to be safe, make sure one didn't pop off. Hopefully someone with more knolage will chime in, I am fairly new to diesels also.
Merry Christmas
Aric

Maybe the exhaust backpressure valve has failed?
http://powerstrokenation.com/forums/showthread.php?t=3979&page=2

Yes, this sounds like you EBPV during normal operation.

Aric - His 97 doesn't have a wastegate or IC if it is all stock. I don't mean any disrespect, just don't want any confusion.

Yes, this sounds like you EBPV during normal operation.


Thanks for the help!

How much is the exhaust backpressure valves?

Get it from the local Ford dealer?

Anyone have a pic of one so I know what I'm looking for? (I think I'm getting a service manual for Christmas...)

That sounds like pretty normal if it was pretty cold out. It does that to restrict the exhaust flow out of the turbo to help warm up the motor.

Tom

I just read your other thread and I think that you just might have a clogged exhaust back pressure sensor tube if you had to mat the pedal to get up a small hill. For a temp fix you can disconnect the two wire connector comming off the turbo pedestal to disable the valve.

Tom

That sounds like pretty normal if it was pretty cold out. It does that to restrict the exhaust flow out of the turbo to help warm up the motor.

Tom

It was cold out, maybe a few degrees below freezing (-2 degC), but not that cold.

I would have thought that it had warmed up enough as it sat running for about 5 minutes while I loaded up and scrapped the windows.

The second time it happened it probably had been running 10 or 15 minutes.

Do I need to watch the water temp. gauge move before driving it?

Sorry about all the questions. Thanks for your help!

I just read your other thread and I think that you just might have a clogged exhaust back pressure sensor tube if you had to mat the pedal to get up a small hill. For a temp fix you can disconnect the two wire connector comming off the turbo pedestal to disable the valve.

Tom

Thanks! I'll check it out. Would that explain the sound that was like a large air leak?

Google to the rescue!
http://www.freeautoadvice.com/diesel/psdback.html

This sounds like it, other than "Also, if you put the pedal to the floor, the valve will open and the truck takes off like a teenager with dad's keys." it didn't seem like it opened when I had to use more throttle to get up the hill.

5 minutes running time at that cold of weather will not have hardly warmed up the truck at all. You are gonna find out a diesel it cold blooded.

Tom

mine sounds like a jet engine :smirk: in the a.m., check your ebv tube mine was plugged it might help some, how many miles on the van?


i plan on deleting mine, and have a high idle setting on the chip

Mine likes to spontaniously come on whenever I actualy need to accelerate... I don't know what makes it want to do that, but its getting gutted when I swap the turbo..

Mine has been gutted a yr. now no worries as far as cold weather driving......,but then again it does not get too awful cold down south here.

It doesn't do #### to help it warm up as far as I can tell... just irritates me and makes stupid brats ask me if I swapped a 6.0 into my truck....

how many miles on the van?

240K miles

From reading lots of different pages on the EBPV it sounded like and I experienced is normal for the PSD. Guess I just need to learn to allow more warm up time.

Will also look into plugging in a block heater if I know I'm going to use it when it is freezing out.

I can drive my truck for an hour and the EBPV will still close, at least to some degree. I'm with Oldschool; I don't think the valve really does anything except get in the way. I find I have to accelerate harder to get through that spot on the tach where the valve has it's most affect....so I feel my mpg is affected negatively by always having to gas through it. I am really looking forward to gutting the thing.

put a timer on the block heater plug and its the best warmup time you can get. that way you dont power all day and night just a couple hours before you go to work. My truck likes it alot better than being cold started in the morning

I can drive my truck for an hour and the EBPV will still close, at least to some degree. I'm with Oldschool; I don't think the valve really does anything except get in the way. I find I have to accelerate harder to get through that spot on the tach where the valve has it's most affect....so I feel my mpg is affected negatively by always having to gas through it. I am really looking forward to gutting the thing.

Might have a problem with soot they can stick might need to remove the housing and clean it up.

Might have a problem with soot they can stick might need to remove the housing and clean it up.


Thanks, I might try cleaning it just to get by for awhile. When the outside air temp is mild I have no problem. It seems to be when it is cold out only??

I had severe EBPV problems last year so I disconnected the actuator arm and wire tied the EBPV flap to the open position. Problem solved.

Will also look into plugging in a block heater if I know I'm going to use it when it is freezing out.

Found the block heater cord under the hood, looks like the previous owner (original) never used it.

Reading the "Ford Owner's Guide Supplement 7.3 Liter Power Stroke Direct Injection Turbo Diesel", page 12 "Engine Block Heater" section.

It says "It is recommended for use whenever the outside temprature is 0*F [-18*C] or below."

It won't get that cold here, but will plugging it in for three hours before starting help with the warm up to stop the EBPV from closing?

The temprature I was thinking of plugging in at would be 32*F [0*C].

I gutted mine a long time ago and don't have any problems getting the truck to warm up quick. Plugging the truck in is the best thing you can do to it period. And its pretty much instant heat too if ya plug it in. Good luck!

CraigH, where are you located???

Found the block heater cord under the hood, looks like the previous owner (original) never used it.

Reading the "Ford Owner's Guide Supplement 7.3 Liter Power Stroke Direct Injection Turbo Diesel", page 12 "Engine Block Heater" section.

It says "It is recommended for use whenever the outside temprature is 0*F [-18*C] or below."

It won't get that cold here, but will plugging it in for three hours before starting help with the warm up to stop the EBPV from closing?

The temprature I was thinking of plugging in at would be 32*F [0*C].


it might not stop it but itll help. I always just tried not to sit to long or coast as not to give it a chance to close.

CraigH, where are you located???

Same place you are....

By any chance are you in the same neighbourhood? :confused: