$1300Es-250 Posted August 26, 2003 Share Posted August 26, 2003 I have a 1990 es-250. It idles really smoothly and runs great at any rpm range except between 1700-2000 rpm. It is like there is a dead spot. I have changed plugs, plug wires, distributor cap and rotor, vacuum hoses, and I ran fuel injection cleaner through it. If you have any suggestions I would be grateful. Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 26, 2003 Share Posted August 26, 2003 is this when parked and just revving the engine or driving or both Quote Link to comment Share on other sites More sharing options...
steviej Posted August 26, 2003 Share Posted August 26, 2003 thoroughly clean the throttle body (TB) and look for cracks or pinpoint holes in the air tube leading from the air box to the TB. sj Quote Link to comment Share on other sites More sharing options...
bbsal Posted August 27, 2003 Share Posted August 27, 2003 yes check what they said and also clean the throttle body real good with some throttle body cleaner (a big can).take off the tube and spray real good on the plate and also open the throttle all the way and spray alot in there.if its real dirty you will see black come out of it! what exactly does it do in that rpm range while driving?does it bog out like you toke your foot off the gas? Quote Link to comment Share on other sites More sharing options...
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