1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Funny exhaust pulses during warm-up

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Old Oct 22, 2007 | 11:43 PM
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TheDriver216's Avatar
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Funny exhaust pulses during warm-up

ok while the choke is out and warming up the exhaust pulses funny.. itll sound normal then all of a sudden itll sound like 3-4 pulses happen at once... ex.. womp....womp....womp....womp,womp,womp, kinda like that i guess.. but when it warms up and the choke disengages it idles normal with no quick pulses... im just wondering if this is a sign of something going wrong
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Old Oct 23, 2007 | 12:07 AM
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Mine does that too, always has. It sounds like it's bridgeported when it does it.

I think it's just because it's running rich, if I close the choke flap when it's hot it does the same thing, then dies if I close it all of the way. My friend's Rabbit did the same thing when we put a Jaguar air flow meter on it, which caused it to make bridge port noises and blast out black smoke.
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Old Oct 23, 2007 | 04:08 AM
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Ryan
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Originally Posted by TheDriver216
ok while the choke is out and warming up the exhaust pulses funny.. itll sound normal then all of a sudden itll sound like 3-4 pulses happen at once... ex.. womp....womp....womp....womp,womp,womp, kinda like that i guess.. but when it warms up and the choke disengages it idles normal with no quick pulses... im just wondering if this is a sign of something going wrong
Thats the Rotary heartbeat. Swear. Its normal...

-Ryan
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Old Oct 23, 2007 | 05:37 AM
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it's the rich burn while cold.
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