Surging,jerking,bucking & dies at idle. I was able to drive truough this problem at first and now it will only idle while I feather the idle. I have replace the TPS and the module at the back of the firewall with used parts. Sparkplugs are black carbon over I'm now thinking coil but that would be a $ 100.00 guess
Vacuum leaks and bad O2 sensors reading false lean making over rich fueling conditions . Stuck open injectors, bad pressure regulator, fuel pump return line blockage all increase fuel pressure also .
Sounds like a bad idle control valve
SOURCE: 1996 acura integra idle surging?
Check this out, http://www.hondahookup.com/forums/showthread.php?t=147179
Step by step guide to diagnosing idle issues on your honda.
SOURCE: 1987 F 150 Problem: engine idle stalling and then surges
I had the same symptoms on my 1993 F-150. A friend of mine commented that he could smell gas in the exhaust. Eventually, it got to where it would start, then die after a few minutes and wouldn't restart after that (at least for several hours). It turned out to be a bad fuel pressure regulator that was causing it to flood. It was about a $25 part and an hour labor to replace (not difficult, just awkward getting to the hex head bolts).
SOURCE: 01 Elantra ,,,surging at idle and drive,,up to 3900 rpm and back
replace spark plug #2 and plug wire if you still get misfire you have faulty injector or bad valve or compression rings on #2 cylinder.
SOURCE: 92 subaru legacy wagon engine surges while
pay close attention to the fuel filter as this is a common symptom and sign of blockage and poor fuel delivery....replace fuel filter
SOURCE: car is surging badly when
Have you yet put Fuel injector cleaner in your gasoline tank because if your fuel injectors get clogged up by using the lower 87 octane gasoline that the impurities would slowly over time clog all your fuel injectors to the point that only small percentage amounts of gasoling would be injected by the clogging.
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