Hello everyone, I’m reaching out on here today due to not having a mechanic shop that’s willing to help me. I’ve had my car for a few years now and haven’t had any issues.
recently I got some check engine codes
1399
P0300
misfire
P0301
misfire
P0305
misfre
P0304
misfire
P0303
misfire
P0302
misfire. P0171

now I have all 6 new spark plugs, and 6 coil packs I did myself.
i also have my status as well.
someone told me to get Lucas fuel injector cleaner and B-12 abs to remove my EGR and clean it with the B-12.

I would take any help please.

CALC-44.7
ECT-183•
STFTB1-30.5%
LTFTB1-10.2%
MAP-13 inhg
ENG RPM-2857
VEH SEEP-18mph
TPS-20.40

 

with no shop willing to look at this for you you can spend the money that would otherwise have gone to their diagnostic fees on a good used copy of the factory service manual and V6 supplemental manual. Primary FSM
Supplemental V6

I would troubleshoot and resolve the P0171 first before addressing the misfire codes. they may go away once that code is fixed. rule out simple things like vacuum leaks and low fuel pressure which can cause this code.

driving the car with these codes present risks damage to internals, so avoid it if at all possible.

this list of codes together suggests its not one or a few cylinders with issue but system wide cause. all 6 injectors being dirty enough for this is really unlikely and I would guess other codes would be present as well if the EGR was clogged.

 

Does the car sound normal when you're trying to start it? How does it run once it's started? Could be a number of issues. I would say 1. Fuel pressure 2. timing belt/ valve issue (clogged cat) 3. ignition system. In that order.