No Start last night
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Elder User
Joined: May 2008
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From: Patricia, Alberta
No Start last night
"Truck wouldn't start last night, spent 2 hours reading the no-start thread on a Ford truck site, had it narrowed down to a hpop leak or icp/ipr failure, grabbed my laptop, multimeter, code reader and other electrical gizmos, went up and pulled codes...none, then decided to wiggle the wires under the dash, away it went. The K.I.S.S. principal in action."
I was all reay to start diagnosing, then I remembered it had a dead pedal a few months back...it would start and idle, but wouldn't respond to the gas pedal, I wiggled the wires under the dash and it started working, so I tried it again.
Guess I need to crawl under with my trouble light and tape and get it fixed.
I was all reay to start diagnosing, then I remembered it had a dead pedal a few months back...it would start and idle, but wouldn't respond to the gas pedal, I wiggled the wires under the dash and it started working, so I tried it again.
Guess I need to crawl under with my trouble light and tape and get it fixed.
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Elder User
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From: Patricia, Alberta
Ok, wishful thinking, went back out and it wouldn't start. Finally got it going, now it has long crank times...I'm thinking it only starts now because it's warm and cranks faster. Seems to help if I push the gas pedal down. Going to start working on it, will let everyone know what I find. (I've did the stc and standpipes/dummyplugs).
I cheaped out a couple of months ago and bought Bostech injectors for it, #4 and #7 won't even click on the buzz test until the oil temp is over 100 degrees, maybe another one is going and that's why it won't start. Buy Motorcraft!!!
I cheaped out a couple of months ago and bought Bostech injectors for it, #4 and #7 won't even click on the buzz test until the oil temp is over 100 degrees, maybe another one is going and that's why it won't start. Buy Motorcraft!!!
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Elder User
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From: Patricia, Alberta
*Update*
Just tested the pressure digitally with a multimeter. I made a permanent test point by clipping 2 of those blue things that you use to splice into a wire on and leaving 2 short pigtails sticking out with crimp connectors on the ends of the wires. The multimeter just plugs into the crimp connectors and I can set it on the cowl and read it. That way I don't need an assistant.
I cranked for a long time (30 seconds) and it only got up to 0.56 volts, and won't even fire. Going to test the IPR next with the AE.
Just tested the pressure digitally with a multimeter. I made a permanent test point by clipping 2 of those blue things that you use to splice into a wire on and leaving 2 short pigtails sticking out with crimp connectors on the ends of the wires. The multimeter just plugs into the crimp connectors and I can set it on the cowl and read it. That way I don't need an assistant.
I cranked for a long time (30 seconds) and it only got up to 0.56 volts, and won't even fire. Going to test the IPR next with the AE.
Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
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Hotshot
Joined: Dec 2003
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From: Stuttgart, Ar
It's a learning experience for sure. Maybe someone needs to make a youtube video of how to operate it??? I'm sure it has a lot more capability than I'm able to drag out of it.
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Elder User
Joined: May 2008
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From: Patricia, Alberta
Thanks for changing the title John.
Ok, just tried the AE. Checked the 4 boxes that deal with the Injection Control Pressure, this is what I got.
KOEO...Injection Control Pressure Regulator-14%. The other 3 were at zero.
Cranking...Injection Control Pressure Regulator - 39%
Injection Control Pressure Desired - 19%
Injection Control Pressure - 19%
Injection Control Pressure Volts - 0
The first thing I did this morning was unplug the ICP..still no start.
How do I check the IPR? I wish they would make the manual a little more "dummy" friendly. Maybe a "Auto Enginuity for Dummies" book?
Ok, just tried the AE. Checked the 4 boxes that deal with the Injection Control Pressure, this is what I got.
KOEO...Injection Control Pressure Regulator-14%. The other 3 were at zero.
Cranking...Injection Control Pressure Regulator - 39%
Injection Control Pressure Desired - 19%
Injection Control Pressure - 19%
Injection Control Pressure Volts - 0
The first thing I did this morning was unplug the ICP..still no start.
How do I check the IPR? I wish they would make the manual a little more "dummy" friendly. Maybe a "Auto Enginuity for Dummies" book?
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
Thanks for changing the title John.
Ok, just tried the AE. Checked the 4 boxes that deal with the Injection Control Pressure, this is what I got.
KOEO...Injection Control Pressure Regulator-14%. The other 3 were at zero.
Cranking...Injection Control Pressure Regulator - 39%
Injection Control Pressure Desired - 19%
Injection Control Pressure - 19%
Injection Control Pressure Volts - 0
The first thing I did this morning was unplug the ICP..still no start.
How do I check the IPR? I wish they would make the manual a little more "dummy" friendly. Maybe a "Auto Enginuity for Dummies" book?
Ok, just tried the AE. Checked the 4 boxes that deal with the Injection Control Pressure, this is what I got.
KOEO...Injection Control Pressure Regulator-14%. The other 3 were at zero.
Cranking...Injection Control Pressure Regulator - 39%
Injection Control Pressure Desired - 19%
Injection Control Pressure - 19%
Injection Control Pressure Volts - 0
The first thing I did this morning was unplug the ICP..still no start.
How do I check the IPR? I wish they would make the manual a little more "dummy" friendly. Maybe a "Auto Enginuity for Dummies" book?
Lead Driver
Joined: Mar 2010
Posts: 5,504
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From: Woodbridge, Ontario, CA
Think again!!! I had a truck that was in for a no-start not too long ago. While monitoring the ICP and IPR PIDs, everything indicated it was within specs while cranking the engine over attempting to start it. Unplugging it resulted in the engine starting up, very quickly indicating a biased reading. Replaced ICP sensor and problem was fixed. The point of the story is NEVER trust the ICP psi readings when monitoring it. It is only a calculated value. ICP VOLTS are the actual readings. And to the OP, 0.56 volts is well shy of the 0.8 MINIMUM required for the PCM to "tell" the injectors to fire.
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Elder User
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From: Patricia, Alberta
So it's obvious I don't have enough pressure in the system. Low pressure is good, the guage climbed right up this morning and would stay there for close to 10 seconds after I stopping cranking. (+25F)
If my IPR is 85%, does that mean it's ok? I don't really understand the percentage thing yet, but I will.
If my IPR is 85%, does that mean it's ok? I don't really understand the percentage thing yet, but I will.
Hotshot
Joined: Dec 2003
Posts: 15,368
Likes: 121
From: Stuttgart, Ar
Think again!!! I had a truck that was in for a no-start not too long ago. While monitoring the ICP and IPR PIDs, everything indicated it was within specs while cranking the engine over attempting to start it. Unplugging it resulted in the engine starting up, very quickly indicating a biased reading. Replaced ICP sensor and problem was fixed. The point of the story is NEVER trust the ICP psi readings when monitoring it. It is only a calculated value. ICP VOLTS are the actual readings. And to the OP, 0.56 volts is well shy of the 0.8 MINIMUM required for the PCM to "tell" the injectors to fire.