Chrsyler 300c 2007 p0300 code and dies at idle.
5.7l NOW TOLD 8V ENGINE WITH 16 SPARK PLUGS. OUCH.
THANKS
ok that is USA OBD2 federal code P0300 and means
all cylinders are misfiring OR RANDOMLY ALL.
it really means all cylinders have random weak combustion
THE CAUSES ARE (ASE DAY1 CLASS)
1: BAD ENGINE, WEAK COMPRESSION OR WORSE.50 CAUSES.
2: BAD SPARK , SPARK PLUGS AND OR BOOTS ON COPS
OMG HAS TWIN SPARK COIL PACKS (PAIRS) ODD LOOKING
8 PACKS + 16 PLUGS
3: BAD FUELING OR BAD FUEL. TOO LITTLE OR TOO MUCH
THE PCM DOES NOT KNOW WHY COMBUSTION EGERGY IS LOW
IT ONLY KNOWS IT IS IN TOTAL ON ALL 8 CYLINDER ARE WEAK.
IT MEANS THE PISTONS ARE SLOW TO MOVE, AT FIRE
THEY MOVE SLOWLY, AND WEAK. ALL DO. ALL 8.
LOTS OF CAUSES.
IF ENGINE TESTS PASS, COMPRESSION AND VACUUM AT IDLE SHOWS SAY 20 INCHES HG./ STEADY NEEDLE THEN WE
CONSIDER, NEXT SPARK PLUGS (DONE) AND COP BOOTS NEXT
THE COP BOOTS ARE 17 YEARS OLD AND THEY SURE DO LOVE TO CARBON TRACK THAT OLD!
THE BOOTS ARE SOLD NEAT,(1BY1) X16
HERE
https://www.rockauto.com/en/catalog/chrysler,2007,300,5.7l+v8,1433754,ignition,spark+plug+/+ignition+coil+boot,10150
ID NEVER RUN BOOTS THAT OLD IF ARE. !!!
IF ENGINE IS GOOD (TESTS) AND SPARK TOO
THEN WE WORK FUELING.
CANT BURN FUEL BAD ENGINE OR SPARK ,
EFI ALLOWS WEAR BUT NOT DEAD THINGS. OK?
THE FUEL TEST IN THE SERVICE MANUAL AND ALL EFI BOOKS IN PRINT IS CLEAR AS DAY , THE TEST ALL
FUEL PRESSURE AT IDLE AND WOT CHECKED.
WE DO THE INJECTOR BALANCE TEST
AND THE INJECTOR LEAK DOWN TEST.
11 TESTS ON A V8, NO GUESSING WE JUST DO THE TEST
OR BUY NEW INJECTORS IF RICH./
OR BATH IN FUEL GUESSING PUMP BAD. WEAK)
I AM NOT SAYING ALL 8 INJECTORS FAIL
SO PUMP PRESSURE TEST ARE NEXT.
OR FIRST IF YOU HAVE THE TOOLS
MANY A TECH DOES 4 TEST WITH TOOLS IN ORDER OF SPEED OF TEST. VACUUM. AND FUEL PRESSURE ARE FAST
BUT IS READY TO DO THEM ALL . OR GOES BROKE GUE$$
SCAN TOOL IS FIRST AND DONE.
COMPRESSION TEST IS TEDIOUS. X8, DONE WITH FUEL PUMP RELAY OR FUSE PULLED AND DONE WOT, AND ALLOW NEEDLE TO PEAK. 150 PSI OR BETTER X8
THE PUMP FUEL IS RATED MIN, 105.0 psi
REG IS IN TANK PUMP.
MY GUESS IS LOW FUEL PRESSURE. BUT IS ONLY A GUESS
I DO THE THE TESTS, NOT GUESSING 50 TIMES.
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