not another NO START thread, starts but idles like crap!!

[ne14sand]

so its an 01-7.3 with 218k on her. she just died while driving and got towed home. it definitely doesn't want to start but will, feels like shes running on 4 cylinders at best. real rough idle and wont rev at all. i have been reading a bit and wts light is normal and tack works. buddy tells me to remove valve covers and check harnesses and for oil coming out of injectors. i really don't know anything about diesels. she is normally a strong runner and starts right up every time no matter how cold it is outside. THANKS for you time. Aaron

[ne14sand]

please HELP

[strokenit]

my '96 7.3 started acting up like that...it was the ICP sensor. however, you can unplug it and see if it clears up to test it i believe. if not...the harness under the valve covers control the injectors and the glow plugs. good luck

[ne14sand]

thanks will take a look

[NoRalPh]

If it was "running great" one min, and on 4cly the next I wouldn't think of injectors first. But you buddies suggestion of looking under the valve covers is a good one!

A quick test for actually running on 4clys (you might be 100% correct here) is to get it started and feel the exhaust manifolds to see if one is cold. That would point to the electrical plugs located under the valve covers (UVCH) that go to the injectors. They are problematic on this engine, and can be a simple fix.....

Try that first, see if one side is just dead...

[ToMang07]

Originally Posted by NoRalPh

If it was "running great" one min, and on 4cly the next I wouldn't think of injectors first. But you buddies suggestion of looking under the valve covers is a good one!

A quick test for actually running on 4clys (you might be 100% correct here) is to get it started and feel the exhaust manifolds to see if one is cold. That would point to the electrical plugs located under the valve covers (UVCH) that go to the injectors. They are problematic on this engine, and can be a simple fix.....

Try that first, see if one side is just dead...

$.50 Mod Pics and Rocker Arm Torque Specs: 50 cent mod - Ford Truck Enthusiasts Forums

7.3 Diesel Powerstroke misfire runs rough code P1316 injector wire harness connection - YouTube

7.3 Diesel Powerstroke misfire runs rough code P1316 injector wire harness connection - YouTube

To check for burnt pins: UVCH burned center pin - Ford Truck Enthusiasts Forums

[ne14sand]

hell thats a great idea!!! and sooo easy. will check

[ne14sand]

ok so according to my cheap laser temp tool there is NO change in temp to the passenger side exhaust manifold, i think this is GOOD news?

[ToMang07]

Originally Posted by ne14sand

ok so according to my cheap laser temp tool there is NO change in temp to the passenger side exhaust manifold, i think this is GOOD news?

If you mean it's not heating up, yes, it's most likely the UVCH. You're going to have to pull the cover, check the harness for burns, if it's good re-attach and place the ground off quarter in the harness to hold it in place, (Or replace the harness and still do the quarter for good measure.) and re-assemble.

Just be careful when removing the bolt that secures the dip stick, they have been known to stick and twist up the dip-stick tube, ruining it.

[ne14sand]

OK i put new gasket and harness on and NO CHANGE!!!??? still NO heat on passenger side exhaust manifold! now what, i find it hard to believe i lost 4 injectors or glow plugs at the same time