Question about Cars & Trucks
Spark plugs r good,how can i check for a bad fuel injector,or clogged,scanner shows multiple missfire on #2 cyl.
Sounds like something in fuel system is clogged form running to low on fuel if vehicle is old and fuel filter has not been replaced for a long time.
It does not take much but a small particle to clog injector or it could be fuel pump is going out. You need to check fuel pressure and change filter and also you might have to get fuel system flushed and you might just have replace injector at worst. Hope this helps
Posted on Oct 24, 2012
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Posted on Jan 02, 2017
This code is a catalyst efficiency code. The catalytic converter is most likely the problem, but it could still be caused by a defective oxygen sensor. The easiest way I know to check for this code is with a scan tool that is capable of reading live data stream. You need to look at the upstream and downstream oxygen sensors, and see if they are mirroring each other. In other words, if the upstream (the one before the catalytic converter) is reading .700, and the downstream ( the one behind the catalytic converter) is reading .700, or anywhere near that, then you have a problem. The numbers are just examples. The upstream should constantly swith from high to low voltage. If the downstream is identical, or even remotely close to having the same reading as the upstream, then you most likely have a defective catalytic converter. This does correspond to what happened a couple of weeks back. A misfire will take out a catalytic converter if not repaired quickly. Also, if you had a converter that was marginal, and was close to failure, then that misfire may have been just what it needed to fail.
Posted on Nov 10, 2008
SOURCE: 97 jimmy wont start
Check for a bad distributor cap and or rotor..........a bad cap and or rotor can caues firing (cross fire)across the terminals and introduce spark to the wrong cylinders at the wrong time.......
hope this helps.....good luck!
Posted on Dec 14, 2008
SOURCE: No spark from coil pack
The most common reasons for them going out are not using dielectric
grease properly when installing, and from washing your engine.
I believe this was a huge issue with Volkswagen vehicles
Posted on Aug 25, 2009
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