Forums
New posts
Search forums
What's new
New posts
New media
New media comments
New profile posts
Latest activity
New showcase items
New showcase comments
Media
New media
New comments
Search media
Members
Current visitors
New profile posts
Search profile posts
Showcase
New items
New comments
Latest content
Latest reviews
Latest updates
Search showcase
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Power Strokes
7.3 Tech
Need ideas.. No start
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
[QUOTE="golfer, post: 1014573, member: 266"] if you have a DVOM/voltmeter, you can monitor ICP voltage while cranking... if you have LPOP (on dash gauge)...and are not making any/significant HPOPressure...then it's either pump, IPR or a leak in the HPOil system...including injs, inj o-rings, inj poppet valves, and the 2 plugs under the VC's (bottom side of HPOil rail)...or the gear simply isn't turning the pump shaft. any leak in the HPOil system will have the exact same result...no/insufficient ICP pressure. most SRP's we've seen fail allow metal (internal springs from the pump defect/failure) work their way into the injector poppet valves... so don't rule out injectors. if you had poppet valves hung open from pump debris...the HPOil rail would gravity bleed down (through the injs) back to the pan. IF you've confirmed a lack of ICP pressure...then you can crank with injs disconnected electrically...to see/visually where the oil is going. ICP voltage/pressure relationship is approximately 1.0v = 750psi...so you'll need about 0.65vdc while cranking to even fire the injs/mechanically. as a side note...unplugging the ICP sensor does NOT give you mechancial pressure, LOL...it simply defaults the PCM value for ICP. leave the sensor/wiring hooked up...and monitor ICP while cranking. The ICP sensor, will have a 3 wire harness that plugs into it. To check the voltage (ICP “pressure”), you will need to leave the harness plugged INTO the sensor, and probe the appropriate wire with your voltmeter lead (other lead to a ground point on engine, or neg. battery terminal). Of the 3 wires, one wire is going to have a constant ~ 4-5.0vdc reading (with the key on, engine off), one wire will be ‘ground’ (check continuity to other grounds)…and the last wire (the one you want to check) will have a variable voltage which varies linearly with pressure [/QUOTE]
Insert quotes…
Verification
Post reply
Random media
Latest posts
T
2023 f350 6.7L
Latest: t.rider.013
Today at 4:13 PM
6.7 Tech
Tuning 101 - Thread Merged with Injector Posts
Latest: Charles
Today at 5:10 AM
7.3 Aftermarket
B-Code VOP
Latest: Powerstroke Cowboy
Yesterday at 9:15 AM
7.3 Aftermarket
9
20% TO 40% OFF ON FORD OEM PARTS
Latest: 99fordman18
Wednesday at 12:02 PM
Sunrise Ford Parts
Lower coil spring pad bolt
Latest: KBMKVIII
Tuesday at 7:14 AM
6.0 Tech
Members online
dsberman94
Powerstroke Cowboy
Forums
Power Strokes
7.3 Tech
Need ideas.. No start
Top