cb1000rider
Austin, TX
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I've got a 1999 Holiday Rambler 32' Class-A.
It has the Ford V10. 62k miles. It also has the banks kit installed (long tube headers, exhaust, intake).
This is my 2nd V10 Class-A, but I've never put more than 1000 miles on them.
This particular model seems to have a variation in power that I'd characterize as a "flutter" - it feels like a single plug/injector kicking in. It happens under high load, IE - a hard pull up a significant slope.
I have an OBD-II scanner and I'm not picking up any misfire codes or setting a check-engine light. Total history of the RV is unknown, I suspect original plugs, but I think Ford indicates that they're good for 100k miles. I'm aware of the challenge that is inherent in replacing them.
So here is my question - how advanced is the Ford OBD-II system in terms of detecting a misfire? I've worked on older Ford EFI (EEC-IV) that had self-diagnostics which included shutting down individual cylinders one at a time to verify an RPM drop, but I don't think modern OBD-II does this.
One of the problems with big powerful engines, especially 8 cylinders and above is that it's not always obvious that a cylinder has dropped out... I suspect that I have one kicking back in..
One way to verify would be to pull the plugs and I may get to that, but 62k shouldn't mean that I've got a bad plug.
I really have no baseline for how powerful these rigs should be, so I'm not sure if I would notice the difference between 9 cylinders and 10.
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Wrong Lane
Fredericton, NB
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Plugs should be ok but the plug wires are likely aged and may cause mis-fire issues. An inexpensive fix (relative to other solutions) would be to replace all the ignition wires.
Can't hurt to try and you would replace the ignition wires if you install new plugs anyhow. Try the wires first and move on from there.
2006 Damon Challenger 348F Ford V10
2011 Ford Fusion on a Dolly
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John Wayne
Long Beach, Ca
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No plug wires you have COP (coil over plug) just for quick check pull 1st cop on the pass. side this is just under the water fitting for the heater. there sometimes is a water leak from this fitting if you haven't replaced the Ford hose clamp with a S/S worm type hose clamp. You should replace all the radiator hose clamps as they tend to rust through and leak ( a known Ford problem with the V-10).
After pulling the 1 st. COP on the pass side check the boot for spark leak. Replace the boot if in doubt.
John & Carol Life members
01 31'Sea View single slide, F53 V-10
96 Toyota 4-Runner auto 4x4 (Remco, M&G brake system)
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MountainAir05
New Mexico
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Unless it is misfiring all the time it will not show up on as a code. You can check each one by disconnecting the small plug to each coil with engine running one at the time. Or a short regular spark plug wire and a timing light. All takes time but it works. Ford has a O scope that they use to check each one. But they have to do each one also. If you feel the engine change then it not that one. Check for water in number 4 and 5 passenger side , the last two on that side. You should have a heater hose that runs over those two plugs and if you get a leak from the clamp then that is where it runs too.
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cb1000rider
Austin, TX
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Thanks for the additional diagnostic suggestions and the likely suspects... We're out camping this weekend, but I'll get her back and start investigating based on your suggestions.
This is a 1999 V10, COP.
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antsinmypants
massillon ohio
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i have a 2003 adventurer that was missing when we was going up a moutain hard pulling and it shifted down i could feel it missing it even had a very light shutter in the steering wheel. anyway it was on our yearly trip to flordia in january so the gas in the tanks was 5 months old i was thinking maybe that might be doing it. we stoped for a overnight at wallmart and i bought couple cans of seafoam dumped 1 can in at each of the next 2 fillups. so im not sure weather it was the old fuel or maybe a injector partly cloged but in march on the way home the V10 ran great smooth as silk at any rpm. just my experance take it or leave it
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LVJ58
Las Vegas, Nevada
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Have you ever changed the fuel filter? If not you might try that and see if it makes any difference.
Good luck with resolving your problem
Jim & Sherry Seward
Las Vegas, NV
2000 Residency 3790 V-10 w/tags & Banks System
2003 Suzuki XL/7 toad
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GREGORYJ
Lac Du Bonnet, Manitoba
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I had this problem on my 02 Ford E450 V10, slightly missing under load , usually going up hill . My Scangauge did record a trouble code that indicated # 4 cylinder missing. The checked in a Ford truck forum site with many indicating probably a bad COP and suggested changing all 10. They also suggested buying them on Ebay from a company selling all 10 for about $140. I did this and changed the spark plugs at the same time. I think the plugs where OK , but easier to do at the same time. Anyway , it solved the problem. The Ford Truck site indicated that a bad COP can't be measured for defect as problem only occurs under load. The after market COP's came complete with boots and they looked exactly like the original Ford COP's which listed at over $100 each. This was 2 years ago & the engine still runs great.
Ellen & Greg
05 National Dolphin 5342
Workhorse W22
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pkunk
Questa, NM
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The headers make it easy to check if you have a dead or misfiring cylinder. Use a IR temp probe and the cool pipe will be the one.
1999 Coachman Mirada 34 ft.V10-F53 chassis
12ft.LR slide-2 gp31 AGM 12V @220AH
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dcg9381
Austin, TX
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Thanks.. that's helpful. I may go the ebay route. I'm not inclined to replace all 10 at $100/pop.
I did find that the 1999 V10 is capable of a KOER test (Key On Engine Running) test which didn't trigger anything, but I believe that it requires the driver to interact with the test, so I'm still digging on the details there.
I pulled the cover today and did find something interesting. Passenger side rear corner, what looks like a coolant passage is open. For the life of me, I can't figure out what the heck should go there. It looks like the connection is missing, but I don't see anything sheered. My best guess is wrong manifold for the heads, but I think that's unlikely...
You guys know what this is/should be?
V10 Photo
* This post was
edited 05/06/12 08:55pm by dcg9381 *
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