New B with a ????
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New B with a ????
Just got my 1<SUP>st</SUP> PSD. It’s a 1995 F250 7.3 PSD, 2 wheel Drive, Manual Tran. with a 4.10 rear. 120000 miles on the OD.
Changed out ALL the fluids (just in case) Fuel filter, put an a RiffRaff air kit.
My question is, every time I start the truck it cranks over about 3 to 4 time, lights off then sort of stumbles during the 1<SUP>st</SUP> 3 to 4 seconds of idling until it just smoothes out and settles into a steady “clack, clack, clack diesel idle.
Iv changed out the GPR because the old one tested bad, but still the same thing.
My question is, is this sound like a problem, or just normal for this year truck.
The old man that bought it new has just passed away, so I can get no real day to day history on the truck.
Any advice?
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Changed out ALL the fluids (just in case) Fuel filter, put an a RiffRaff air kit.
My question is, every time I start the truck it cranks over about 3 to 4 time, lights off then sort of stumbles during the 1<SUP>st</SUP> 3 to 4 seconds of idling until it just smoothes out and settles into a steady “clack, clack, clack diesel idle.
Iv changed out the GPR because the old one tested bad, but still the same thing.
My question is, is this sound like a problem, or just normal for this year truck.
The old man that bought it new has just passed away, so I can get no real day to day history on the truck.
Any advice?
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fficeffice" /><o></o>
Senior User
Joined: Jul 2009
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From: Bellingham, WA
What kind of oil are you running in it? does your tach bounce "violently" during the "stumble" if you start it and give it some throttle does it still sound/feel like its missing/stumbling. you could pull the e brake assembly and look at the code on the pcm. easy thing to check anyways!
Elder User
Joined: Jan 2012
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From: Southern West Virginia
Could be bad glow plugs. Or you might have some bad pins for the glow plugs in the valve cover harness or pigtails. Look for two plugs on the inner side of the valve covers(towards the center of the engine, as opposed to the fender side of the vc) for two plugs on each vc. Unplug them and check for pins that look burnt. I'd check that first. If there are burnt pins, then those pigtails/vc gaskets will probably need replacing. If so, get ford parts. If no burnt pins, then I would pull the vc and ohm and/or put a test light on the glow plugs. Search on this forum for the procedures/ohm specs. Even though you replaced the GPR, if you have some bad glow plugs, it could do this. It's surprising how much more difficulty these things have starting without all 8 glow plugs working properly. Those are the simple things and more common things to go bad. I'd check them first before you go looking for anything serious. If you have to replace any GPs, get the motorcraft ones and not the parts store ones. It's good to check these anyway and replace if necessary, even if it's not your problem.
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Thanks for the quick reply.
Im running Amsoil 15w-40, I will check the tach tonight, but I dont think it is bouncing. If I give it gas, it will smooth out, but return to the stumbling and last about 3 to 4 seconds still, unless I hold the RPMS high for over 30 to 40 seconds.
My PCM Code is VDH4, what would this indicate?
Im running Amsoil 15w-40, I will check the tach tonight, but I dont think it is bouncing. If I give it gas, it will smooth out, but return to the stumbling and last about 3 to 4 seconds still, unless I hold the RPMS high for over 30 to 40 seconds.
My PCM Code is VDH4, what would this indicate?
Elder User
Joined: Jan 2012
Posts: 584
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From: Southern West Virginia
Thanks for the quick reply.
Im running Amsoil 15w-40, I will check the tach tonight, but I dont think it is bouncing. If I give it gas, it will smooth out, but return to the stumbling and last about 3 to 4 seconds still, unless I hold the RPMS high for over 30 to 40 seconds.
My PCM Code is VDH4, what would this indicate?
Im running Amsoil 15w-40, I will check the tach tonight, but I dont think it is bouncing. If I give it gas, it will smooth out, but return to the stumbling and last about 3 to 4 seconds still, unless I hold the RPMS high for over 30 to 40 seconds.
My PCM Code is VDH4, what would this indicate?
Sorry, I couldn't help myself. By the way, welcome to FTE. And we joke a lot on here, so put your thick skin on!
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Post Fiend
Joined: Dec 2010
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From: Orrville, Ohio
Is that oil rated for use in a diesel engine with an HEUI injection system? These engines use the engine oil to drive the injectors so you need a good quality oil that is made for that purpose. It sounds to me like you have some bad glow plugs that need to be replaced. You can ohm them out through the wiring connectors on the valve covers if you like. I'm guessing you have a few that are bad.
Senior User
Joined: Jul 2009
Posts: 476
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From: Bellingham, WA
Thanks for the quick reply.
Im running Amsoil 15w-40, I will check the tach tonight, but I dont think it is bouncing. If I give it gas, it will smooth out, but return to the stumbling and last about 3 to 4 seconds still, unless I hold the RPMS high for over 30 to 40 seconds.
My PCM Code is VDH4, what would this indicate?
Im running Amsoil 15w-40, I will check the tach tonight, but I dont think it is bouncing. If I give it gas, it will smooth out, but return to the stumbling and last about 3 to 4 seconds still, unless I hold the RPMS high for over 30 to 40 seconds.
My PCM Code is VDH4, what would this indicate?
http://powerstrokenation.com/forums/...ead.php?t=3363
Last edited by bryanlindborg600; May 23, 2013 at 11:00 AM. Reason: supply of link
Elder User
Joined: Jan 2012
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From: Southern West Virginia
Can you describe the stumbling? That's a good point that Bryan makes. If the PCM is for an auto, then often times the truck will "romp" or "lope" at startup. See this video:
<iframe width="420" height="315" src="http://www.youtube.com/embed/M8u51Y5EcW8" frameborder="0" allowfullscreen></iframe>
Anything like that?
<iframe width="420" height="315" src="http://www.youtube.com/embed/M8u51Y5EcW8" frameborder="0" allowfullscreen></iframe>
Anything like that?
Elder User
Joined: Jan 2012
Posts: 584
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From: Southern West Virginia
I would hook that back up. For a number of reasons...safety being the first reason. There are guys that have it unhooked and run it like that, but personally I'd rather have mine hooked up. That PCM being in that truck is weird. I would think it would not run right, since the '99 and newer trucks have different injectors, and that PCM is programmed to run those injectors, and not the ones in the OBS trucks. Does the truck have a chip?