NOODLE Posted March 17, 2012 Share Posted March 17, 2012 hi the last couple of days i have picked up a misfire, im not sure why its doing it but the revs hold high when the car is warm aswell, the fuel smells sweet so im not sure whether the choke is disconnecting properly, causing it to over fuel, after 2500rpm the misfire goes but comes back when the rpm drops back below. anyone had this issue before? Quote Link to comment Share on other sites More sharing options...
Nodalmighty Posted March 17, 2012 Share Posted March 17, 2012 Check your vacuum pipes. Especially the ones to the map sensor and fuel pressure regulator. Then do an error code test. Lyndon. Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted March 17, 2012 Share Posted March 17, 2012 Could be the o2 sensor? Probably wouldn't notice that so much at higher rpm if its happening then aswell Quote Link to comment Share on other sites More sharing options...
Nic Posted March 17, 2012 Share Posted March 17, 2012 NA or TT? Quote Link to comment Share on other sites More sharing options...
NOODLE Posted March 17, 2012 Author Share Posted March 17, 2012 NA or TT? na mate Quote Link to comment Share on other sites More sharing options...
Nic Posted March 17, 2012 Share Posted March 17, 2012 na mate Have you washed the car recently, has the engine got wet? Check the condition of the plugs, check the HT leads are okay and secure, remove the distributor cap and check condition of contacts/rotor arm. Quote Link to comment Share on other sites More sharing options...
NOODLE Posted March 18, 2012 Author Share Posted March 18, 2012 i bled the system a last weekend so might be water in the plugs, will that cause it to idle at 1100 rpm? its able to pull off by itself which i definitely knows not supposed to happen lol Quote Link to comment Share on other sites More sharing options...
Guest Budz86 Posted March 20, 2012 Share Posted March 20, 2012 That's normal when you start the car from cold, it should drop to around 700 after a few minutes. Quote Link to comment Share on other sites More sharing options...
NOODLE Posted March 21, 2012 Author Share Posted March 21, 2012 no i mean it stays around the 1100 rpm range, even when up to temp Quote Link to comment Share on other sites More sharing options...
NOODLE Posted March 21, 2012 Author Share Posted March 21, 2012 its going in for a service tomorrow to see if that sorts out the miss fire. Quote Link to comment Share on other sites More sharing options...
listy Posted March 21, 2012 Share Posted March 21, 2012 interesting. i picked up the same problem today it seems. except mines a tt. im checking vacuum pipes and sparks and ht leads tomorrow to see if it solves the problem Quote Link to comment Share on other sites More sharing options...
NOODLE Posted March 26, 2012 Author Share Posted March 26, 2012 the service solved mine in the end, it turns out the previous owner's trusted mechanic wasnt as trusting as they thought,only 3 of the spark plugs were changed, because he could'nt be f**ked to do his job right. its solved the miss fire and the high revving issue i should have a rotor arm arrive today as well so il replace that and then pay day might see me gettin some magnacore leads and a dizzy cap :-) such a pain in the arse when people lie about the service history according to mine it was fully serviced. but the last mechanic charged the previous owner for the work and parts and only did half the work. what a bell end. i made sure the work was all carried out properly with all the recommended parts used and it feels like a totally different drive :-) just shows that if its done right it runs right haha Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 26, 2012 Share Posted March 26, 2012 The correct diagnosis would be to use a gas analyser up the exhaust to check HC's. If it was an ignition miss the HC's would be high. if it was an injector not firing, either all the time, or occasionally, the HC's would be normal. I see supposedly competent and long standing garages and mechanics making a total meal out of diagnostics every week, usually using the "let's try changing this" school of thought, which makes them look incompetent, which they are, and makes the customer pay for diagnosis time that's patently excessive. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.