Sounds Like A Miss
Post Fiend
Joined: Sep 2006
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From: Millbrook Alabama
Originally Posted by dawg 21
I Have A 99 F350 With A 7.3 Diesel The Check Engine Light Is On And It Sound Like It Has A Miss It Has 155,000 Miles On It Has Anybody Had This Problem
I hate to be vague but all we can do is guess till we have a code, then we can point you in the right direction of a fix.
O, BTW the OBDII code scanners from auto parts stores and wally world will not pull the codes as these will be Ford specific codes.
Last edited by bdrummonds; Mar 18, 2007 at 07:57 PM.
Cargo Master
Joined: Jun 2003
Posts: 3,292
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From: Ardenvoir, Washington
Originally Posted by dawg 21
I Have A 99 F350 With A 7.3 Diesel The Check Engine Light Is On And It Sound Like It Has A Miss It Has 155,000 Miles On It Has Anybody Had This Problem
GGIICIIGG
G - Glow Plug
I - Injector +
C - Injector -
Ohms between the G and block Ground should be 0.1 - 2.0 ohms.
Ohms between the I and C one at a time if one or more is > 5 ohms, it will point to the side's gasket connector or UVC harness being shorted.
Mine did the same thing and it was the driver side under valve cover 9 pin connector was just loose and ready to fall completely apart.. Ford has a fix, a plastic clip.. But I just made a shim and slipped it under the plastic locking tabs so the connector can not come loose.. The pass. side was also loose but still making contact.. fixed also with my shim method..
Elder User
Joined: Aug 2002
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From: Laveen
I gotta get the manuals and stuff for my wifes truck' I havent looked yet to see what shroud connectors are, but my wifes truck started running rough and had the SES light on and off, and she took it to ford to get it fixed. 653.00 later its working again. All I know right now is they are somewhere on the covers. I've still gota fix my 84 F150 and the AC in my Isuzu
Postmaster
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From: Fulltime RVer
This is what I recently posted for a similar problem, but after doing so saw it wasn't a 99. Since yours is, let me add that my UVC never showed codes and was only found by exploratory surgery under both valve covers after all other possibilities were tried. I now have spares for CPS and IDM which I hope I never have to use.
From the miles, it sounds like it might be an early 99 like mine. Check my post #4 and #5 here https://www.ford-trucks.com/forums/592457-flashing-od-light.html to see what all I replaced (CPS, IDM..) only to find problem was UVC. I was told that Ford changed the spec on this plastic connector after all the initial problems with it. So if that's your problem, I suggest replacing both sides with updated version.
Edit: Oops, I just saw you're a 2000, so UVC is less likely.
From the miles, it sounds like it might be an early 99 like mine. Check my post #4 and #5 here https://www.ford-trucks.com/forums/592457-flashing-od-light.html to see what all I replaced (CPS, IDM..) only to find problem was UVC. I was told that Ford changed the spec on this plastic connector after all the initial problems with it. So if that's your problem, I suggest replacing both sides with updated version.
Edit: Oops, I just saw you're a 2000, so UVC is less likely.
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Junior User
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I've pulled the codes there are 4 of them could one bad part cause 4 codes
the codes are
p1316 injector circuit/idm codes detected
p0478 exhaust pres. ctrl valve high output
p0470 exhaust back pres sensor circuit error
p0541 manifold intake air heater circuit low
thanks Dave
the codes are
p1316 injector circuit/idm codes detected
p0478 exhaust pres. ctrl valve high output
p0470 exhaust back pres sensor circuit error
p0541 manifold intake air heater circuit low
thanks Dave
Last edited by dawg 21; Apr 8, 2007 at 06:51 PM.
Post Fiend
Joined: Jun 2006
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From: Central, Al
Well the 470 & 478 are the exhaust backpressure sensor. It has gone out or it and its feed tube have clogged.
The 541 is a burnt out intake air heater element or IAH Relay If you still have it.
The 1316 (IDM codes stored) holds the key to the miss but you will need a BUZZ an CCT to pull the IDM codes. Ohm the hrness out like clint posted above.
The 541 is a burnt out intake air heater element or IAH Relay If you still have it.
The 1316 (IDM codes stored) holds the key to the miss but you will need a BUZZ an CCT to pull the IDM codes. Ohm the hrness out like clint posted above.
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Junior User
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My Buddy Got The Truck Running Like A Top He Pluged The Wiring Harness Back In Under The Valve Covers Made A Shim For The Plug The Feed Tube Had Holes In It He Made A New One Changed The Water Pump
Put In 2 New Batteries Now It Running Great
Thanks For All The Help Guys
Put In 2 New Batteries Now It Running Great
Thanks For All The Help Guys
Cargo Master
Joined: Jun 2003
Posts: 3,292
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From: Ardenvoir, Washington
Originally Posted by dawg 21
My Buddy Got The Truck Running Like A Top He Pluged The Wiring Harness Back In Under The Valve Covers Made A Shim For The Plug The Feed Tube Had Holes In It He Made A New One Changed The Water Pump
Put In 2 New Batteries Now It Running Great
Thanks For All The Help Guys
Put In 2 New Batteries Now It Running Great
Thanks For All The Help Guys
Postmaster
Joined: Jun 2006
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From: Fulltime RVer
Originally Posted by amiller93
Yep, sometime in 02 was when they started using the updated connectors.
Now I'm wondering if I got the new ones? Do you know if they look any different. The following part #'s are from the "new" ones that were installed on Oct 20003.
F81Z-9D930-AB.....Wire Assembly UVC
F81Z-6584-AA........Valve Cover Gasket