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Discussion Starter · #1 ·
Changed injectors now have misfire from #1 cylinder. Switched coils, plugs and injectors. Didn't have problems before. Did compression check 120 psi on cylinders 1, 3,5 . Don't know what to do to find problem.
 

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Discussion Starter · #3 ·
Yes it is. You can't get to injectors so you have to go from harness connection behind bank 1. Tried cylinder 1 and 3 they were getting the same pulses. I have no idea I have to fix this car. Customer wanted new injectors because a little stubble on start. Come to find out it's normal.. something to do with a double pulses on start to heat Is Cadillac converters quicker. That's what I read. Need to know what to check. All I did was while apart was clean the throttle body while off..

If I clear codes and recheck after running I get po300 multiple cylinder misfire but look at counters and #1 is the one misfiring 3 and 5 once in a while but that's mostly on start at first and it's just for a second. Could a bad throttle body throw a misfire on just one cylinder continuely??
 
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