Service engine light on P0300, P1174
04-16-2010, 04:48 PM
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Service engine light on P0300, P1174
Hey guys I work at a local repair shop in Waterloo, Il I have a diagnostics tech telling me I need to replace all 4 of my injectors & reprogram due to a TSB I have 2 of the 3 engine codes on and we can watch cyl. 4 misfire lots on idle approx. 1000 times in a 5 min span. so we ran the injector balance check and all came up ok. What do you guys think about this? I don't feel like dropping 300 bucks on a guess HELP!
04-17-2010, 08:13 PM
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Well I switched the coils over and still the same so I took the plugs out and check them and switched them and still the same...I'm running out of options looks like my tech is getting his guess right so far 
06-15-2010, 10:12 PM
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If your p300 code is indicating which cylinder is misfiring, change the coordinating fuel injector. I had both these codes on mine, with a p301, I changed the cylinder 1 fuel injector and no more problems.
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