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#1
10-27-2012, 02:36 AM
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PLEASE HELP!!! E99 ROUGH IDLE NO POWER
I have a early 99 and yesterday i was driving and all of a sudden it started running rough the check engine light came on and it died. i cycled the key and it fired right up. it runnin real rough and has no power. so far i have changed the fuel filter, buzz tested fine and has 45 pounds of fuel pressure at idle @ 500rpm. im also getting code p1668.. i have read it mat be gem module, what is a gem module? whats your thoughts?
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TOW RIG early 99 crew cab swb psd 4" lift 35's gtp38r turbo stage 3 hybrids Diesel Innovations tunes DIY tymar intake 4" turbo back 6spd manual 4x4 MUD BOG TRUCK  82 full size bronco solid axle d44 chromo axles 4.56's and a detroit up front 9" 4.56's and spooled in rear c6 trans 4k stall np205 408w stroker @ 650 flywheel h.p. 
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#2
10-27-2012, 03:45 AM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
That code is for the IDM module which is under the hood on the driver side. I would start by looking at the connections at the valve cover gaskets for burnt or damaged pins. The other possibility is that one of the connectors to the injectors on the inside of the valve cover gasket came loose. In order to fix that you need to pull the valve cover gasket and physically check it out. Look up the 25 cent mod for a permanent fix to this problem.
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97 F-350 XLT CC DRW 4X4 PSD, 285/75-16 Custom bumpers, Gauges-boost/egt/trans, Swamps IDM, 3.5"dp- 4" exh., 3" Body lift, ES bushings/mounts, Built trans, billet conv, B&M pan, Hayden cooler, Adrenaline, stage 2's, IC, H2E, E-fuel ARP's, 910's, Smith Bros. to come
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#3
10-27-2012, 05:26 PM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
i have checked the harness all the way to uvch, if it was a harness wouldnt it fail the buzz test? i have a friends truck over and im gonna try his idm and see what that does.
could it be cps?
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#4
10-27-2012, 08:12 PM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
Nope it is an IDM code. Your IDM could be faulty. Just be careful you don't fry your buddy's IDM.
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#5
10-27-2012, 09:00 PM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
swapped idm and still runs bad...
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#6
10-27-2012, 09:31 PM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
Have you physically taken a volt meter to the uvch's?
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"Shamoo" 2002 F250 7.3 E.C.L.B. e99 block. 18"KR Wheels, Rosewood 238/100's,BTS 4R100,Gearheads tunes,6637, 4 inch down, 5 back, 7” tip. DI headers, I.H. bellowed up pipes, Garrett 38r 1.0,CCV Mod
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#7
10-29-2012, 01:08 AM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
fuel pressure seems low at idle. bad pump???
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Early 99'(10/18/98)f-250,4x2,Super Cab XLT 8' Bed MBRP 4" Turbo Back W/ 5" Tip, Grover 1700 Single Trombone Air Horn Coolant filter Bypass W/ Napa Gold #4070 Filter Air Intake #6637 Filter W/CCV Mod,V-10 Trans Cooler Stewart Warner Gauges: Trans,Pyro,Boost, 15% Window Tint Retro Solutions 55 watt HID's 5000k 08' Super Duty Finned Diff Cover
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#8
10-29-2012, 05:40 PM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
Quote:
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#9
10-29-2012, 05:41 PM
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Re: PLEASE HELP!!! E99 ROUGH IDLE NO POWER
i got it pulled down to the valve covers after church and before football... ill get the uvch ohmed tonight.
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