Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
the only code number it is setting is P0307 ?
do you feel it skipping or just that one cylinder is dead like at idle if you pull off the # ***** wire the engines idle stays the same and any other wire you pull off the idle gets worse ?
is just # ***** dead at idle where you pull the wire off of # ***** and the idle does not change at all but all other wires do change the idle when pulled off the cap ?
is the cap and rotor brand new ?
do you see spark jumping out of the # ***** off the cap where the # ***** wire goes into the cap ?
if you do a compression test on that bank of cylinders of 1 3 5 7 what do all 4 read for compression ?
ok if # ***** is 0 or very low pull the valve cover and see if any rockets fell off or if a push rod or lifter broke and crank it over watching those rockers v/s the others and also check for a broken valve spring
that cylinder just needs spark fuel and compression to fire
that low for PSI ?
a bad fuel pump would effect all the cylinders not just one cylinder
no pull the coil wire off and just crank it over like 5 or 6 times with the starter to get the reading
then release the valve on the tool and do it again to be sure
try it gain
calm down..no worrys
if all 4 of those cylinders are above 120 ish then compression is not the issue
the compression is good
the 7 wire is in the cap correctly and where 7 should go and there is spark at the plug wire where it connects to the 7 spark plug and swapping 7 plug with 3 plug the skip is still 7 cylinder ?
with a new injection unit and the compression good we are getting down to a bad crank sensor or possibly a cam shaft issue
swapped 3 and 7 spark plugs only and it did this ?
good evening my name is ***** ***** I will assist
from the previous conversation, you have covered all the basics. the only possibilities that are left are valve train issues. you may have a broken valve spring or a camshaft or lifter failure.
you said you have spar, fuel from the injector, and good compression. with all that, it leaves a mechanical issue. if the pcm was the failure, then you would be missing injector pulse to the cylinder.
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you need to do a fuel pressure test. you can rent a tester from a parts store
ok, spec is 58-62 while running. the pump is not working correctly. you have low fuel pressure which could cause the issue as well.
no, as long as the motor is running, the pump is on. it should never make any noise what so ever
you definitely need to replace the pump.