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Old 04-28-2019, 08:13 PM   #1
Junior Member
Brand: Still Looking
State: California
Posts: 1
THOR #14639
Angry Mis fires of f450

We have a 2019 Thor z28 with the Ford f450 10 cyclinder. We keep getting check engine light and reading shows mis fires of cyclinders #2 and #9. In garage twice and mechanics can find nothing wrong. Anybody have this problem?

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Old 04-28-2019, 09:49 PM   #2
I Think We're Lost!
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Brand: Still Looking
Model: Tiffin Wayfarer 24 BW
State: New York
Posts: 14,668
THOR #8860
Welcome to the Forum!
Are ou sure that they took a close look at all of the connections?
(I like to never assume anything...)

Good Sam Member 843599689
FMCA Member F473304
Current coach: Tiffin Wayfarer 24 BW
"Well I may be confused... But you know I sure ain't down!"
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Old 04-28-2019, 10:06 PM   #3
Senior Member
Brand: Thor Motor Coach
Model: '17-Vegas 24.1
State: California
Posts: 834
THOR #13362
Gas cap
MAP sensor (manifold absolute pressure sensor)
Oxygen sensor
Fuel filter

The service mgr generally will do the least intrusive remedy first, with no regard of your inconvenience for unlimited follow-up visits

Good luck
'17 Vegas 24.1
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Old 04-29-2019, 01:40 AM   #4
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Brand: Thor Motor Coach
Model: Quantum RS26
State: Indiana
Posts: 288
THOR #10823
I'll add plug wires to Taylorbob's list. Things get pretty tight and hot under the E450 hood and one or two wires could be "induction firing" under load. One question however, independent garage or Ford dealership garage?
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Old 04-29-2019, 02:11 AM   #5
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Brand: DRV
State: Texas
Posts: 676
THOR #3109
A Ford dealer would be able to hook the computer to the OBD II port and drive it to duplicate the problem and get a real idea of what the trouble is. This should be under warranty, stay on them to find it.
2016 Tiffin 40QBH
2015 38RSSA--traded
2005 36TK3--retired, but it was a good one
2017 F450 KR
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