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powerstroke quit

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bbf-falcon
Bart Knox
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Post  Bart Knox December 31st 2016, 9:23 pm

My 96 f250 powerstroke quit like I shut the key off and won't start... I changed the lift pump and have 5-8 psi at the filter and changed the camshaft positioning sensor with a new one and swapped the IDM with my 95 powerstroke f350 tow truck and now can't get the tow truck running again... Do I need to have the codes cleared after changing the IDM??? Any suggestions would be appreciated

Thanks Bart
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Post  bbf-falcon January 3rd 2017, 12:55 pm

Are you sure the new sensor is good? Check wire connection also.

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Post  bbfstanger January 3rd 2017, 1:46 pm

yes you do have to clear the codes if theyre in there.

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Post  Bart Knox January 3rd 2017, 3:35 pm

New and old CPS move the tac when it's rolling over and I have a friend bringing a scanner from work this weekend... Tried swapping the IDM twice with my 95 f350 tow truck and the 350 won't run with the one with my 96 f250 road truck and my road truck won't run with either
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Post  Bart Knox January 5th 2017, 10:39 pm

What should I get for pressure from the lift pump??? I'm getting 8 when cranking
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Post  BigRigTech January 8th 2017, 10:42 pm

you should see 60-65psi of fuel pressure at the filter housing with the truck running. Have you unplugged the fuel heater and checked the fuse for it to see if it's blown? It shares the same fuse as the IDM does so if it blows the IDM will not fire the injectors. Is it making smoke when you crank it?
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Post  tbirdmike January 9th 2017, 1:02 pm

BigRigTech wrote:you should see 60-65psi of fuel pressure at the filter housing with the truck running. Have you unplugged the fuel heater and checked the fuse for it to see if it's blown? It shares the same fuse as the IDM does so if it blows the IDM will not fire the injectors. Is it making smoke when you crank it?

what this guy said.

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Post  69F100 January 9th 2017, 7:59 pm

BigRigTech wrote:you should see 60-65psi of fuel pressure at the filter housing with the truck running. Have you unplugged the fuel heater and checked the fuse for it to see if it's blown? It shares the same fuse as the IDM does so if it blows the IDM will not fire the injectors. Is it making smoke when you crank it?

check the wires going to the ipr valve and fuel heater they run around behind the fuel filter and make sure they are in good shape/not showing bare spots in the wire and make sure they haven't melted together
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Post  Bart Knox January 13th 2017, 9:08 am

Schrader valve is where I checked pressure and only getting 8 psi... And no smoke wile cranking... I'll ckeck everything else out that you guys mentioned and get back... Now i have been told so many different things about the pressure from the lift pump not running... I was told 5 PSI.  10PSI.  25 psi .... When you check pressure at the schrader valve on side on filter bowl not running I'm getting 8 PSI.
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Post  tbirdmike January 13th 2017, 10:08 am

does this have a mechanical lift pump in the valley of the engine?

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Post  Bart Knox January 14th 2017, 9:17 am

Yes... And I changed it with a used one... Was seeing 8psi
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