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Old 07-03-2012   #1
max76
 
Join Date: Apr 2009
Location: ITALY
Posts: 264
Default idle problem

Hi guys....
i have a little problem with my 1990 zr-1.
When i start the engine it's run great...but after some minutes it run bad...it's seem like lose rpm and it's shake for few second, after it run ok...and after few minute it run bad for few seconds.
if i push oh the accellerator pedal the engine run good.
I change: Spark and fuel filter.
I test the fule pressure and it's ok...50 psi on both pumps without run engine.
What can i check???
Thanks to all!!!!
Max
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