currently 28 degrees. thats not cold enough? tried ipr and nothing. tried going to extreme tune and it was about dead. have to wait for a jump. he says that programmer wont tell you the pressure on the data stream and i dont remember seeing it on there

 

no, fuel wont wax or gell until like, single digits if its good fuel and if you fuel bowl heater is working.

speaking of which, unplug that too and see what happens! sometimes those heaters come apart inside the fuel bowl, short, and alot of the time it'll shut the truck down. do that and try it again.

OHHHHH i see you used the programmer to read codes. then that wont show you what the HPO pressure is. what you need to look at that is either a mechanical guage or a scanner with datastream.

 

it seemed like most of my research outside of here led to fuse 22 (fuel heater, pcm, whatnot) he tested the fuse. i need to find a good picture of the fuel heater plug right now.

is there any special type of scanner? we are at wyotech so somebody has to have something

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also as of last night we lost the wait to start light

 

battery is dead... had the same exact prob with my 97... those things are tough to jump, the only thing that would jump mine was an actual charger/jumper... but then i found out the reason i had such low juice was cause my wiring harness was shot... try wiggling it around a little and see if the wait to start light comes back

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he may need new batteries or he may need a new harness... im thinking that because of the cold it probably dropped his battery power down a bit

 

but its been fine til tuesday wednesday. we had it cranking pretty dam good. i'll give the wiggling a shot. we've had a 6.0 powerstroke helping us with battery power a lot

 

If you dont have a WTS light your not getting power to the PCM...

Throw out the off road fuel, that is not relevant.

Throw out the temps, that is not relevant...

First thing you need to do is get power to the PCM.

Without a scanner of some kind your not going to get anywhere.

When cranking you need to look at IPR duty cycle and ICP pressures.

 

I was hoping you'd chime in. i'm trying to find someone here with one because we cant quite get the truck to a parts store with one. hopefully by the time we get home today we can have one in hand. is there nothing you'd suggest without a scanner in case we cant get one?

 

I wont be back on until monday night... Dont get on when home on the weekends.

Check the Duty cycle and ICP pressures when cranking. It will not try and fire until it has 500psi. If you see the duty cycle going to 50-60%, just stop cranking until you replace or clean the IPR.

If that doesn't fix it you have an ICP pressure issue with the pump, injectors or worst case a low pressure oil issue.

You say this is a 96 truck?

Be sure to check the fuel pressure at some point. Only need 3-5psi to start the truck, but you should be seeing no less then 40 psi once running.

 

the edge data stream which doesnt tell me a whole lot says we have a fuel pressure of 5 psi. yes it is a 96 model year truck and i believe i saw a 96 date on the engine

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also is fuel pressure measured before or after the filter?

 

theres a schrader valve on the right side (drivers side) of the fuel regulator. check it there if you have to.

fuel pressure should be 30-70 psi at idle
atleast 450psi of high pressure oil to start.

a Snap On MODUS scanner, otc, or MAC, or anything that does datastream will get you through. to check duty cycle, if the scanner doesnt do it, youll need an ocilliscope.

also if you turn the key to the "ON" position, do you get a check engine light, odometer, or battery voltage?

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actually wait, you stated earlier that your edge will come on, you can retrieve codes and other things.

YOUR PCM IS POWERED UP. but it may not be good.