sosolid Posted October 6, 2013 Share Posted October 6, 2013 when the car starts up its perfect but when ive driven it and its warmed up and i stop in traffic or park up the idle drops to .5rpm then goes up to 1000rpm then down then up. keeps going up and down. why is this. sparks are brand new. could it be leads or anything else. Quote Link to post Share on other sites
sosolid Posted October 6, 2013 Author Share Posted October 6, 2013 could it be throttle position sensor? its similar to the below link. >http://www.youtube.com/watch?v=c-f0bCcQ63o Quote Link to post Share on other sites
Chris Green Posted October 6, 2013 Share Posted October 6, 2013 I would check the TPS 1st, then plugs and plug leads. Quote Link to post Share on other sites
sosolid Posted October 7, 2013 Author Share Posted October 7, 2013 how would you know thats the problem? Quote Link to post Share on other sites
rmsnoel Posted October 8, 2013 Share Posted October 8, 2013 Clean your throttlebody. Think about your idle control valve here. When u start up from cold your idle valve lets in alittle more air, this keeps the revs abit high until the engine warms up. When the coolant reaches tempature the valve closes. Your warm car should idle at 750_800. Id say around your throttle butterfly is oily or the idle valve is dying. Its free to clean the throttlebody. Id bet if u tighten the throttle cable to idle at 900 you will have no problems Quote Link to post Share on other sites
sosolid Posted October 19, 2013 Author Share Posted October 19, 2013 how do you tighten the cable? cant i just turn the thing on the throttle body to increase the revs? Quote Link to post Share on other sites
rmsnoel Posted October 20, 2013 Share Posted October 20, 2013 Go to a mechanic and tell them what I said. If you have been driving around like this for over twp weeks your vest just to go to a mechanic and ask him to take a look or listen to the car. £20 should be morw than enough to check it over, clean the throttle and set the idle Quote Link to post Share on other sites
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