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tootype2crazy
Samba Member
Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
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 Posted: Tue Nov 13, 2012 9:38 am Post subject: ugh...bus idles and revs fine, but bucks under load |
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I drove my wife to breakfast this morning, no problem on the way there. Upon leaving once I got out on the road it started to hesitate upon accelerating. It quickly descended into a rhythmic loss of power/sudden burst of power. It idles fine and revs fine while in neutral. It only does this when the engine is under load, such as punching the pedal or going up a hill. Fuel pressure shows good at idle, I have no way to test it while driving. I did recently install a new pertronix ignitor to replace the one I killed with a dead battery. Any thoughts?
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air-cooled or nothing for me
1978 Sunroof Deluxe Bus (daily driver)
1978 Transporter (mom's, making into a camper)
1970 Single Cab 2.1 turbo/EFI 6 Rib, 78 front beam, vanagon backing plates on rear (project)
2001 GTI VR6 (wife's) |
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porschpow
Samba Member
Joined: May 21, 2005
Posts: 1256
Location: Hamilton, NJ / Flanders, NJ
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| Posted: Tue Nov 13, 2012 9:44 am Post subject: |
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What Kind of motor is it? Carb/Fuel injection? Got any of those details?
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-1973 Volkswagen Bus Westy (Weekender)
1.8 liter from 1.7(original)
-2011 Subaru Outback
-1986 Honda Magna |
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Westfabulous
Samba Member
Joined: January 07, 2007
Posts: 4207
Location: The tropic of Canada, dodging the giant flying moose of Surrey!
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| Posted: Tue Nov 13, 2012 9:47 am Post subject: |
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You should keep this with your other thread to ensure continuity. It could be many things:
AFM sweeper field
fuel pressure
clogged fuel filter
unplugged AFM (not likely)
Ignition system
TS2
The list goes on. You need to try and narrow it down. If this occurred since installing the pertronix, then I would look at that very closely.
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"I will gladly pay you Tuesday for a hamburger today." |
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MRJEL
Samba Member
Joined: June 04, 2012
Posts: 478
Location: Jawja, USA
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| Posted: Tue Nov 13, 2012 9:49 am Post subject: Re: ugh...bus idles and revs fine, but bucks under load |
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| tootype2crazy wrote: |
| It idles fine and revs fine while in neutral. It only does this when the engine is under load, such as punching the pedal or going up a hill. ? |
At least in modern cars that is a classic symptom of bad plug wires. |
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tootype2crazy
Samba Member
Joined: October 08, 2007
Posts: 1276
Location: St. Louis Missouri
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airkooledchris
Samba Member
Joined: January 25, 2005
Posts: 2713
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| Posted: Tue Nov 13, 2012 2:52 pm Post subject: Re: ugh...bus idles and revs fine, but bucks under load |
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| MRJEL wrote: |
| tootype2crazy wrote: |
| It idles fine and revs fine while in neutral. It only does this when the engine is under load, such as punching the pedal or going up a hill. ? |
At least in modern cars that is a classic symptom of bad plug wires. |
If you missed the other thread - dingdingding!
Good call! |
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