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godtool
09-06-2012, 11:11 PM
Buddys 87 chev 305 we replaced the IAC motor and it idles low like normal except now the engine idle surges up and down slightly. Sounds likes its going to stall then it picks up again. Engine sat for a couple yrs yet it revs out really nice. I know nothing about these efi units. I was thinking a bad spark plug. Any ideas appreciated.

85chevy
09-07-2012, 12:08 AM
vacuum leak???

Troy
09-07-2012, 04:20 AM
throttle position sensor maybe?

what have you replaced on it

hillclimber
09-07-2012, 11:26 PM
unicorn shit in the air intake:dontknow: :)

abec
09-08-2012, 12:17 AM
Id say vacumme leak but try cleaning the egr out

In The Zone
09-08-2012, 10:44 AM
most likley vacuum leak,

godtool
09-08-2012, 07:33 PM
Thanks!

longhorn
09-08-2012, 07:56 PM
unicorn shit in the air intake:dontknow: :)

Wonder if thats whats wrong with my Toyota