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08-21-2015, 11:48 AM
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#1
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Junior Member
Join Date: Aug 2015
Posts: 25
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1990.5 Bounder 454 problem
I just changed plugs and plug wires on my bounder now it struggles to get over 20mph anyone know what might be wrong??
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08-21-2015, 02:59 PM
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#2
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Senior Member
Join Date: Apr 2011
Location: Powell River, B.C.
Posts: 31,266
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Welcome to iRV2.
You did a maintenance tune up ? or were you after this problem in the first place ?
Was the fuel filter replaced ?
Does the engine start well and idle smooth?
Is the check engine light on ?
__________________
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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08-21-2015, 03:08 PM
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#3
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Senior Member
Join Date: Jan 2015
Location: So.Cal.
Posts: 297
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is it running smooth? if not, you crossed the wires.
if it is.. did you gap the plugs? could be too small and not firing on all cylinders.
Did you twist the cap when working on it and retard the timing (most likely)
__________________
2013 Itasca Sunova 30A
2006 Crownline 250cr
2012 Ram Laramie Longhorn
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08-21-2015, 03:47 PM
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#4
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Senior Member
Join Date: Dec 2014
Location: High up in Arizona
Posts: 2,050
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Good question that needs to be answered. How was it running before you changed out the plugs and wires? This is where you need to start.
__________________
2019 Allegro Bus 37AP towing a Jeep JK Rubicon Wrangler
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08-21-2015, 03:52 PM
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#5
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Senior Member
Winnebago Owners Club
Join Date: Feb 2014
Posts: 961
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Do you hear spark jumping?
Check the Plug Wires for proper firing order
Be sure they are all on a plug, or on a coil
Because it ran good before-I bet you have the rotation wrong,wire not on a plug, or the spark is jumping to a ground
If you have a distributor cap- it might need replacement, i.e., could be jumping fire inside.
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08-21-2015, 04:02 PM
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#6
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Member
Join Date: Oct 2013
Posts: 46
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I would bet you have a crossed wire.In the future always do one wire @ a time.
The firing order is on top of the manifold.A Chiltons manual or do some searching on the web for firing order for 454 will help you get them back in order
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08-21-2015, 05:41 PM
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#7
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Senior Member
Damon Owners Club Vintage RV Owners Club Oklahoma Boomers Club
Join Date: Jul 2011
Location: Bartlesville Oklahoma
Posts: 1,300
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Also check that plug wires are fully seated on the plugs
__________________
1996 Damon DayBreak 454 P37 Chassis
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08-21-2015, 05:45 PM
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#8
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Junior Member
Join Date: Aug 2015
Posts: 25
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Thanks. I checked the firing order seems to be correct. I didn't think about the fuel filters but it does start right up and idles a little rough. I'll have to check the plug wires for tightness again.
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08-21-2015, 05:47 PM
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#9
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Senior Member
Winnebago Owners Club
Join Date: Feb 2014
Posts: 961
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PS- Did you happen to clean the engine -with engine cleaner & then hose it off?
If you did, your problem will be condensation inside the distributor cap- assuming you have a distributor cap. Dry it out with WD 40.
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08-21-2015, 06:57 PM
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#10
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Junior Member
Join Date: Aug 2015
Posts: 25
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Call me stupid but how does changing plugs and plug wires get condensation in the distributor cap?
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08-21-2015, 07:06 PM
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#11
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Senior Member
Tiffin Owners Club
Join Date: Mar 2015
Location: Southern NM
Posts: 2,514
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Did you have a problem before changing the plugs, if so what was the problem
__________________
2005 Tiffin Allegro Bay 37DB
W22 Workhorse Chassis 8.1 Flat Towing a 82 Jeep CJ7
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08-21-2015, 07:44 PM
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#12
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Junior Member
Join Date: Aug 2015
Posts: 25
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No. Unfortunately I didn't have the problem before changing the plugs and wires. I'm kicking myself for trying to be proactive and changing some old plugs.
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08-21-2015, 07:45 PM
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#13
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Junior Member
Join Date: Aug 2015
Posts: 25
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My plugs were gapped at .040 the oe says .035
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08-21-2015, 07:45 PM
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#14
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Junior Member
Join Date: Aug 2015
Posts: 25
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I changed to platinum from copper
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