Truck Runs Rough at Idle - Ford Powerstroke Diesel Forum
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post #1 of 10 Old 01-12-2020, 12:20 PM Thread Starter
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Truck Runs Rough at Idle

Noticed on my way to work on Friday that the truck was running rough at the light pulling into work. Pulled the codes, took the pic and went into work. Made it home after work with about the same issue. At speed it seems to run fine. It's just when I stop at lights it starts idling rough. I have several codes. I can attack each one individually but wanted to see what ya'lls opinion was. I'm all stock, no tunes, stock exhaust and intake. Still running an EGR cooler (replaced last year with a Bulletproof along with stock oil cooler).

My voltage numbers look good I think. FICM stays at 48v and the vehicle battery is between 13.5 and 14. my truck does have dual alternators if that matters. I think that's everything. Thanks!
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2005 F350 Lariat
Torqshift Tranny
Bulletproof EGR
OEM Oil Cooler
Sinister Coolant filter
Rotella T6
Archoil
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post #2 of 10 Old 01-13-2020, 04:11 AM Thread Starter
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I pulled both batteries and had them tested. Both are good to go.

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2005 F350 Lariat
Torqshift Tranny
Bulletproof EGR
OEM Oil Cooler
Sinister Coolant filter
Rotella T6
Archoil
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post #3 of 10 Old 01-13-2020, 11:51 AM
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Looks like it has a misfire on cylinder 8, that would cause a rough idle. As far as what's causing the misfire it could be any of a few things.

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post #4 of 10 Old 01-15-2020, 07:54 PM Thread Starter
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Put the batteries back in and it started up fine. Noticed some smoke coming out the pipe and thought it was condensation in the pipe. Ran it up to operating temps and backed into my parking spot. Couldn't hardly see where I was backing up looking out the passenger side mirror there was so much smoke. Must have lost an injector is my guess.

2005 F350 Lariat
Torqshift Tranny
Bulletproof EGR
OEM Oil Cooler
Sinister Coolant filter
Rotella T6
Archoil
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post #5 of 10 Old 01-16-2020, 06:13 AM
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Originally Posted by USAF93 View Post
Put the batteries back in and it started up fine. Noticed some smoke coming out the pipe and thought it was condensation in the pipe. Ran it up to operating temps and backed into my parking spot. Couldn't hardly see where I was backing up looking out the passenger side mirror there was so much smoke. Must have lost an injector is my guess.
Probably so (#8). You don't want to drive it much that way. Excessive fuel can cause damage quickly.

The camshaft sensor or wiring may need attention also. Inspect the wiring first.

Mark
06 F250CC SB FX4 Lariat; ARP studs; OEM gaskets; Banks exhaust; DynaTrac Ball joints; RACCCV6000; JimmiJammers; Ravelco; SynchroMax in trans case; Fumoto valves; Harpooned; Blue regulator spring; DashDAQ; PHP FICM; RiffRaff boots; DCPower 270AXP; Power Inverter; Bilstein shocks; BPD EGR cooler, radiator, water pump; SCT w/ SRL+; Rotella ELC Ultra Coolant; X2Power AGM batteries
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Last edited by bismic; 01-24-2020 at 03:54 PM.
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post #6 of 10 Old 01-24-2020, 03:49 PM Thread Starter
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Just to add closure, all new fuel injectors, stand pipes, o-rings and glow plugs and I am back on the road. Not cheap but this, along with the oil/egr coolers last year and I hope I'm good to go for a while.
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Torqshift Tranny
Bulletproof EGR
OEM Oil Cooler
Sinister Coolant filter
Rotella T6
Archoil
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post #7 of 10 Old 01-24-2020, 03:55 PM
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If the STC fitting has been replaced and you are running an EC-1 rated ELC coolant, then you should be good to go.
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Mark
06 F250CC SB FX4 Lariat; ARP studs; OEM gaskets; Banks exhaust; DynaTrac Ball joints; RACCCV6000; JimmiJammers; Ravelco; SynchroMax in trans case; Fumoto valves; Harpooned; Blue regulator spring; DashDAQ; PHP FICM; RiffRaff boots; DCPower 270AXP; Power Inverter; Bilstein shocks; BPD EGR cooler, radiator, water pump; SCT w/ SRL+; Rotella ELC Ultra Coolant; X2Power AGM batteries
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post #8 of 10 Old 01-25-2020, 03:43 PM
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Just to add closure, all new fuel injectors, stand pipes, o-rings and glow plugs and I am back on the road. Not cheap but this, along with the oil/egr coolers last year and I hope I'm good to go for a while.
S#!+ happens of course but I'm thinking you're covered for a while. Keep up with the maintenance and use a good Synthetic oil. Was this your 1st go around with injectors?

k

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post #9 of 10 Old 01-25-2020, 04:13 PM Thread Starter
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This was my first go around with injectors. The mechanic said a couple looked to have been replaced before but when #8 was hung and #7 was hanging the mechanic said, and I agree, best to just replace them all or I'd be getting towed back and paying labor to replace them soon anyway. 206,000 miles, gotta expect them to be going.
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Bulletproof EGR
OEM Oil Cooler
Sinister Coolant filter
Rotella T6
Archoil
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post #10 of 10 Old 01-25-2020, 04:58 PM
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This was my first go around with injectors. The mechanic said a couple looked to have been replaced before but when #8 was hung and #7 was hanging the mechanic said, and I agree, best to just replace them all or I'd be getting towed back and paying labor to replace them soon anyway. 206,000 miles, gotta expect them to be going.
I had my truck towed twice for injector failure. Less than a month apart! When the 3rd went out I elected to replace the remaining 6. I haven't had to replace one since. 122K on the injectors and counting.

k
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