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Old 09-07-2014, 11:49 AM   #1
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V-10 Surging No Power - - Help

While entering the 4 lane today, slowing increasing speed at around 55 MPH, the engine starting surging/bucking. I released the cruise control and pulled aside the road. The engine sounded OK, and proceeded home. When approaching 56-60 MPH, it had no power and would not go any faster. When stepping on the accelerator, it had a hollow sound with no increase in speed or power. I limped back 25 miles to home at 56-62 MPH, and it only slowly worked up that speed. It would take its good ole time. No engine check light and all the dash gauges were as usual with no changes.

The air filter looks good and was changed 6000 miles ago. No dirt or buildup on it.
The fuel filter has 7000 miles on it.
The outside temp at the time was 84 degrees.
The engine temp accordingly to my Scan Gauge was 194 degrees.
The transmission temp accordingly to my Scan Gauge was 198 degrees.
I have approximately 23,500 miles on motorhome.
The engine and transmission oil looks good and are both at the full mark, with 450 miles on last engine oil change.

Any ideas where I need to start to fix my baby?

Thanks to all in advance for your help.
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Old 09-07-2014, 11:57 AM   #2
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I know this sounds crazy, but..... I used to own a 1999 Coachman Santera with the V10 engine and I had this same thing happen to me on I-75 in GA. It "fixed" itself after a few miles and didn't happen again. I sold the RV to a friend (told him all the problems and sold it REAL cheap) and the air conditioner clutch seized and he had to have it towed because he had no power. I can only presume that I was having the same problem. He was able to fix it by replacing the clutch. If you stop that solitary serpentine belt nothing works. I always carry a spare one now.
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Old 09-07-2014, 11:58 AM   #3
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A bad tank of fuel can plug a fuel filer in a half tank of use.
JMHO: Cheapest , first thing to try.

EDIT: Cut the removed filter open, and if contaminants are found , be ready to replace another in short order.
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Old 09-07-2014, 12:02 PM   #4
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My OM says: Do to the high fuel usage change the fuel filter every 5000 miles. Mine's a Chevy but.........
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Old 09-07-2014, 12:09 PM   #5
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I would change fuel filter, check fuel pressure.
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Old 09-07-2014, 12:17 PM   #6
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Quote:
Originally Posted by mrt_1111 View Post
I would change fuel filter, check fuel pressure.
I change mine every year at about 7500 miles.
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Old 09-07-2014, 12:19 PM   #7
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Idle air control valve sticking resulting in too lean condition with open throttle?


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Old 09-07-2014, 12:31 PM   #8
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Quote:
Originally Posted by Virago-Rider View Post
Idle air control valve sticking resulting in too lean condition with open throttle?
Virago-Rider, how does one check the idle air control valve and where is it on the engine. This week I will change the fuel filter, and I am eager to learn. Is this doable or does it need to be brought in the shop to check the idle valve?

Thanks Again to all...........
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Old 09-07-2014, 12:43 PM   #9
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V-10 Surging No Power - - Help

On most engines it is located on the throttle body.

There are some videos on you tube showing how to check. Often they can be cleaned with spray carb or brake cleaner. Taking one off is sometimes a bit of a PITA. Buy, it is doable.


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Old 09-07-2014, 12:50 PM   #10
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Here is one... This one is on a Honda car, but basically the same idea.

http://youtu.be/tUkCCwqU3eU


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Old 09-07-2014, 01:11 PM   #11
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V-10 Surging No Power - - Help

...
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Old 09-07-2014, 01:12 PM   #12
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Old 09-07-2014, 05:16 PM   #13
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An IAC issue will not cause your concern. IAC issues will cause an idle problem. It cannot cause a lean condition because the air into the engine is still being monitored via the MAF. Plus when driving the IAC is almost fully open. That hollow sound is usually a good sign of a low fuel pressure issue or lean condition caused by a MAF sensor. My first check would be to check fuel pressure. Also make sure all you air intake connections are secured and nothing came off. If fuel pressure is ok you can disconnect the MAF sensor and retest. If it runs better there is a good chance it is bad or contaminated. Seen many MAF issues caused by improper air filter securing. Debris gets into the hot wire and causes issues.
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Old 09-07-2014, 08:15 PM   #14
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Quote:
Originally Posted by Virago-Rider View Post
Here is one... This one is on a Honda car, but basically the same idea.

http://youtu.be/tUkCCwqU3eU
Virago-Rider, thanks for the info on you tube. I checked a few IACV videos and they said it really affects the idle part of the engine. I am not having idle problems, so I will keep this in mind and check out a few other things first. Thanks for responding. I'm learning something everyday.
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