CCT test:
this test compares the RELATIVE BALANCE between the output of (not just the injs!) but
everything that contributes to the power output of that cylinder...which includes quite a lot.. from
that cylinders compression (piston ring sealing), the intake & exhaust valve sealing, valve lift,
injector output, etc..we've even seen bad torque converters and flywheels cause enough engine
vibration to cause various cylinder balance faults..so, while a scan tool can aid in the
detection/direction of a problem... experience can & will outweigh a scan tool 9 out of 10
times..."no codes" doesn't mean everything is "OK"...and conversely...just because you HAVE a
code...doesn't mean that there is a problem...or it has anything at all to do with a specific problem
or issue.
so...a truck could have 8 weak injectors...that show up FINE on these tests...or 8 GOOD injectors
that could fail CCT in a worn out engine...balance is balance...so even if you DID have
something show up on a CCTest...it doesn't mean it's BAD...hell we've seen guys replace the
same inj, multiple times...leaving the other 7 w/ 200k+ miles...and call back saying that they still
have the same code(s)...in these types of cases...a STRONG injector will show out of balance
against the 7 old/weak injs...
More rare issues, such as aerated engine oil...or aerated fuel can also cause
goofy/poor/inconsistent running issues..that new injectors can't fix...or may only fix for a short
time...
the last thing we like to do is have someone purchase injs for a truck/engine that needed
injectors...but later finds out that the injectors weren't the only problem.
Compression is king...meaning....that if the compression is good...then the engine can be fixed,
and is worth investing time/money in getting it to run properly...but if compression is poor or
mediocre...no amount of injectors, sensors, fuel system/HPOil system improvements are going to
make it 100% right...it may only make the situation/engine run "better"...