Stalling Problem at Idle
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Elder User
Joined: Apr 2008
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Stalling Problem at Idle
Hey folks, hoping for some words of wisdom from you folks that know more about diesels than I do 
I have a '94.5 Powerstroke, turbo 7.3L I've put about 1500 miles on it since I bought it (150k at the time) with no troubles. A couple weeks ago I put a K&N filter in it, but did not use any hand-held programmer. Not sure if it is related to the filter or just a coincidence, but lately the truck has stalled on me about 6-7 times while coming to a stop and ideling at stop signs/lights. It will start right back up, and if it appears to stutter again i apply the gas and get the rpm's up to about 1k and it stays running. And other times I can come to a stop and idel with no troubles...so its very random. My idel is about 600 rpms, which seems low to me. Other than that truck runs great, and it starts right up after the WTS light. I just towed my loaded car hauler this weekend and it did fine, save for the fact that it died on me 3 different times at lights.
Does this sound related to the K&N, do I have an idel sensor going bad, can I bump up the rpms somehow at idel to cure it, etc.....
Any ideas or advice would be greatly appreciated.
I have a '94.5 Powerstroke, turbo 7.3L I've put about 1500 miles on it since I bought it (150k at the time) with no troubles. A couple weeks ago I put a K&N filter in it, but did not use any hand-held programmer. Not sure if it is related to the filter or just a coincidence, but lately the truck has stalled on me about 6-7 times while coming to a stop and ideling at stop signs/lights. It will start right back up, and if it appears to stutter again i apply the gas and get the rpm's up to about 1k and it stays running. And other times I can come to a stop and idel with no troubles...so its very random. My idel is about 600 rpms, which seems low to me. Other than that truck runs great, and it starts right up after the WTS light. I just towed my loaded car hauler this weekend and it did fine, save for the fact that it died on me 3 different times at lights.Does this sound related to the K&N, do I have an idel sensor going bad, can I bump up the rpms somehow at idel to cure it, etc.....
Any ideas or advice would be greatly appreciated.
Postmaster
Joined: Nov 2006
Posts: 2,609
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From: somerset KY
maybe a bad CPS, maybe bad fuel pressure. get an appointment at dealer to have CPS recall performed.
check your fuel pressure. on the drivers side of the fuel filter housing, there is a tire pressure looking valve. take the cap off, and check pressure with n oil pressure gauge, and proper end.
clean FPR screen.
check your fuel pressure. on the drivers side of the fuel filter housing, there is a tire pressure looking valve. take the cap off, and check pressure with n oil pressure gauge, and proper end.
clean FPR screen.
Posting Guru
Joined: Nov 2001
Posts: 1,743
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From: Ft Scott
94-96 use a different CPS than the 97's and later. Here's the proper one for your 96:
eBay Motors: NEW FORD POWERSTROKE 7.3 CAM SENSOR CPS 94-96 (item 160239929257 end time May-22-08 07:49:03 PDT)
eBay Motors: NEW FORD POWERSTROKE 7.3 CAM SENSOR CPS 94-96 (item 160239929257 end time May-22-08 07:49:03 PDT)
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Elder User
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FPR Screen....I'm assuming this stands for Fuel Pressure Regulator?? Where is this located so I know what to clean?
So would you all think the K&N is safe to leave in (not the root of the problem) or should I put a standard filter back in?
So would you all think the K&N is safe to leave in (not the root of the problem) or should I put a standard filter back in?
Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
FPR screen is located in the Fuel pressure regulator. The FPR is located on the drivers side of the filter bowl. You can take out the 2 bolts that hold it on and you will see the screen easily. You can also clean the screen from inside of the filter bowl but it is hard and you can't get it very clean that way. The FPR has o-rings that seal it so don't worry about getting a gasket.
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Elder User
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Ok, thanks for the responses. I will change the fuel filter and clean the FPR screen. I also just bought a new CPS and will install that.
A few remaining questions:
Where is the CPS located - somewhere easily accessible on the block I hope
Does 600 rpm sound right for idle? If not is there a way to bump it up?
And since it got no responses I assume the K&N Filter is in no way the root of my problem (even thought the problem started after I put it in)?
Thanks again
A few remaining questions:
Where is the CPS located - somewhere easily accessible on the block I hope
Does 600 rpm sound right for idle? If not is there a way to bump it up?
And since it got no responses I assume the K&N Filter is in no way the root of my problem (even thought the problem started after I put it in)?
Thanks again
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Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
K&N is frowned on very much around here. You need to get a 6637 from NAPA and either a 4" piece of exhaust pipe bent at 45* or a 3" 45* PVC fitting. You can also get a 45* 4" pipe directly from NAPA also (not sure on part #).
600 RPM sounds fine to me.
CPS is located on front of block by the crank. Easy to reach. Get a 10 mm deep well 1/4" drive socket and 1/4" ratchet works best, can also be done with 3/8" with a short extension. You will also need a screwdriver to pry the old one out.
600 RPM sounds fine to me.
CPS is located on front of block by the crank. Easy to reach. Get a 10 mm deep well 1/4" drive socket and 1/4" ratchet works best, can also be done with 3/8" with a short extension. You will also need a screwdriver to pry the old one out.
Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
The K&N drop in elements have been known to allow too much dust in and ruin the turbo blades. The pipes are to connect the 6637 air filter to the existing intake hose. Do a search here for 6637 and it should describe it very well. I would post up a pic but I can't access my pics at this computer
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Elder User
Joined: Apr 2008
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Ok, I see what it is. Knowing how CAI kits work on Mustangs, is this really something that I need to worry about on a truck that I am only going to be driving <5000 miles a year? I'm not looking to increase power, show off with increased turbo whine or anything like that, I just want a truck that is trust worthy, runs good (which it does), and gets me from point A to B when I decide to haul a load. If you are saying the K&N elements are bad, would it be sufficient just to go back to a replacement element in the stock box for all that I am using it for?
Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
Look here:
https://www.ford-trucks.com/forums/7...37-filter.html
Here for pic, You don't need the box but it may give you an idea
http://www.supermotors.net/getfile/5...1607-051-2.jpg
Here is a pipe from NAPA:
NAPAONLINE®
More pics:
https://www.ford-trucks.com/forums/7...first-mod.html
Here are the pics I was looking for. It should make it clear for ya.
https://www.ford-trucks.com/forums/7...my-6637-a.html
https://www.ford-trucks.com/forums/7...37-filter.html
Here for pic, You don't need the box but it may give you an idea
http://www.supermotors.net/getfile/5...1607-051-2.jpg
Here is a pipe from NAPA:
NAPAONLINE®
More pics:
https://www.ford-trucks.com/forums/7...first-mod.html
Here are the pics I was looking for. It should make it clear for ya.
https://www.ford-trucks.com/forums/7...my-6637-a.html
Thread Starter
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Elder User
Joined: Apr 2008
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OK, just did a bunch more reading and perhaps this is the way to go. I'm also concerned that I oiled up my K&N too much. I'm assuming my truck has a MAF? If so, where is it located so I can get it cleaned up just in case some of the filter oil was sucked in.
Thanks again for all your help on this.
Thanks again for all your help on this.
Hotshot
Joined: Aug 2006
Posts: 10,764
Likes: 39
Ok, thanks for the responses. I will change the fuel filter and clean the FPR screen. I also just bought a new CPS and will install that.
A few remaining questions:
Where is the CPS located - somewhere easily accessible on the block I hope
Does 600 rpm sound right for idle? If not is there a way to bump it up?
And since it got no responses I assume the K&N Filter is in no way the root of my problem (even thought the problem started after I put it in)?
Thanks again
A few remaining questions:
Where is the CPS located - somewhere easily accessible on the block I hope
Does 600 rpm sound right for idle? If not is there a way to bump it up?
And since it got no responses I assume the K&N Filter is in no way the root of my problem (even thought the problem started after I put it in)?
Thanks again
I might get the truck on a scanner & look at ICP Pressure & IPR DC % at idle ...A sticky IPR can cause this ...
you may have already done this , but if not , ,look at the ICP sensor ,, look for oil leaking from it ...
BTW ...no maf