Guest Posted July 18, 2001 Share Posted July 18, 2001 when tap on gas pedal car misses..brought car to mechanic can not find any trouble codes..also car had trouble starting.took a few tries...but no codes are stored...when mechanic hooks up computer to car does computer check all systems electrical and such??car has 107k on it and complete tune up<p>[ 07-18-2001: Message edited by: emmoe ] Link to comment Share on other sites More sharing options...
Guest Posted July 19, 2001 Share Posted July 19, 2001 Has the fuel filter been replaced? Link to comment Share on other sites More sharing options...
Guest Posted July 19, 2001 Share Posted July 19, 2001 yes fuel filter,wires, plugs, pcv valve..once when i was on highway doing steady speed car sputtered....all after tune up Link to comment Share on other sites More sharing options...
Guest Posted July 23, 2001 Share Posted July 23, 2001 May be the Oxygen sensor. Link to comment Share on other sites More sharing options...
padgett Posted July 23, 2001 Share Posted July 23, 2001 If miss is generally in a high load/low rpm condition (e.g. hill at 50 mph), a failing coil pack can cause that. Plugs and plug wires can also cause but sounds like you have changed. These will not set any codes.<P>Did the mechanic actually read the values (e.g. closed loop, O2 transitions, TPS .5v at idle/4.5 v at WOT) or just trust the computer ?<P>Mine had nearly new Autolites in it & had a minor miss at idle. Replaced with AC RapidFire #3s and miss is gone. Have had very good luck with RapidFires (plug plug) in all my cars. Link to comment Share on other sites More sharing options...
Guest Posted July 23, 2001 Share Posted July 23, 2001 replaced o2sensor.still miss..removed coil pack and found sticky substance underneath..I think this is ignition module...if it is at fault how do I remove it?I drive a 1990...I see something in front by wiring that looks like a plug (bolt) of some kind.... Link to comment Share on other sites More sharing options...
Guest Posted July 23, 2001 Share Posted July 23, 2001 Note you suggest a TPS of .5v at idle/throttle closed postion. Hal suggested I use .4v. Which is correct for the 1990 motor? Link to comment Share on other sites More sharing options...
Guest Posted July 23, 2001 Share Posted July 23, 2001 service engine light stays on with a/c running.. Link to comment Share on other sites More sharing options...
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