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Misfiring and farting through throttle body...

  • chris.marland
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02 Sep 2019 14:39 #33359 by chris.marland
Misfiring and farting through throttle body... was created by chris.marland
My 05 dodge neon is farting and popping after an alternator fried. Smelled an odor while driving, Quarter mile down the road vehicle stalls at red light. Attempts of cracking over fails, would not crank by the key at all. Was diagnosed is an alternator that failed due to a leak In the power steering hose. I replaced alternator, then was told the starter was bad by a garage. I knew with an electrical issue but didn't have the proper tools to diagnose . Well after using the tools that I did have which was a multi meter armed a test light, with an engine Crank battery starter, I went ahead and checked I think about 80% to 85% of the wiring harness for the starting system as well as several components. It now cranks over by the key and starts but it revs it self up-and-down about 4 or 5 times and then comes tool kind of a high idle with farting and popping in the Throttle body. I know this still an issue with the Something under the hood but not quite sure where to start. I'm a backyard mechanic got AGE D in studied one year in mechanic school, I know what I know but could always use to know more.

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  • cheryl hartkorn
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02 Sep 2019 15:13 #33362 by cheryl hartkorn
Replied by cheryl hartkorn on topic Misfiring and farting through throttle body...
first the title had me laughing of your post. did it do it before you checked the electrical system?? sounds like a vacuum leak or a lean condition to pop through the intake

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02 Sep 2019 17:10 #33365 by chris.marland
Replied by chris.marland on topic Misfiring and farting through throttle body...
I'm not sure, but i first heard a misfire then i went old school and raised the throttle by hand and and maintained about 1800 rpm give or take and it started doing it all while that was going on. At first i thought my kid did it but he wasn't in the car at all. Now every time you turn it over the idle races for a sec and fluctuates 4 or 5 times then idles high by itself while doing all the farting and popping in the throttle body tube. Anyway i can test the TPS?

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18 Sep 2019 13:40 #33670 by rpd1125
Sounds like a huge vacuum leak possible incorrectly installed or missing from the intake manifold should be easy to hear that high vacuum leak

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18 Sep 2019 23:03 #33680 by guafa
Hi everyone,

Is that huge vacuum leak relate to alternator replacement?

Could that steering fluid cause a short in IAC wires?

What about strangle air by completely closing throttle body by hand? That way if engine starts again with high revs we can asume a vacuum leak.

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18 Sep 2019 23:06 #33681 by guafa
Hi everyone,

Is that huge vacuum leak related to alternator replacement?

Could that steering fluid cause a short in IAC wires?

What about strangle air by completely closing throttle body by hand? That way if engine starts again with high revs we can asume a vacuum leak.

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