Question about 2003 Buick Rendezvous
Unplug the #3 plug wire from the coil, have someone crank or start so you can check for proper spark from #3 coil tower (a test light attached to ground works well, get close to tower and spark should jump to test light) be careful don't get shocked. should jump a gap 3/4 inch and be blueish. If good spark possible faulty injector or burnt valve
Posted on May 11, 2014
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Posted on Jan 02, 2017
SOURCE: have a2003 buick rendezvous 3400
you might not be getting a injector pulse signal at # 3 cylinder ? easy way to check this is with a noid light, it plugs in to the end of the connector and as crank the engine the light should flash. if it does not flash check wire harness for a open circuit from injector to computer ( e.c.m.) if thats alright possibly e.c.m. bad . if you cant find noid light you can use a digital volt meter. good luck
Posted on Feb 19, 2011
SOURCE: my 96 roadmaster has a
Your vehicle's engine emission system is monitored by the On-board Diagnostic (OBD) computer.
Misfires can be caused by any number of circuits ranging from MAP, TPS, HO2, Injectors, Vaccuum leaks....and so on.....and so on.....
The misfire you speak of will have triggered the appropriate fault codes which will be stored in memory. As there could be numerous causes for this condition, you really should have your codes read by your local dealership.
Checking for fault codes only takes 15-25mins (depending on experience of the technician), and will quickly identify the suspected circuit/s.
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Posted on Jul 31, 2011
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P0303....Cylinder 3 Misfire Detected
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sounds like a new set of HT leads and plugs wouldnt go amiss(fire wires) weird name that fire wires HT stands for high tension leads in proper english .
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