How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Tim's Auto Repair Your Own Question
Tim's Auto Repair
Tim's Auto Repair, mechanic
Category: Chevy
Satisfied Customers: 15880
Experience:  Have owned a repair shop for 25 yrs.
14541291
Type Your Chevy Question Here...
Tim's Auto Repair is online now
A new question is answered every 9 seconds

1999 chevy, 3800 engine. p0300 code, new plugs ac delco,new

Customer Question

1999 chevy, 3800 engine. p0300 code, new plugs ac delco,new wires, coil , ecm, fuel injectors, still has code intermittent, engine has a slight miss.
Submitted: 1 year ago.
Category: Chevy
Expert:  Tim's Auto Repair replied 1 year ago.

Hi, My name is ***** ***** for the delay.

I will do my best to assist you

the common thing that will cause this code other than the plugs and wires is a bad ignition module,,the ignition module is located under the coils

thanks

PLEASE COPY AND PASTE the link below to your browser, I have uploaded more info on this there please copy and paste the link below to your main browser[INTERNET EXPLORER or FIREFOX]

.

https://www.dropbox.com/s/ghkk12bvw4rgown/0905-lumina-ICM.doc?dl=0

.

if the link doesn’t work that way, try it this way

thanks

.

www.dropbox.com/s/ghkk12bvw4rgown/0905-lumina-ICM.doc?dl=0

.

Customer: replied 1 year ago.
I did install a new AC DELCO ignition control module last week. One coil. 3 fuel injectors, but all are operating. The noid device shows this. New wires, new ac delco plugs. Still service engine light come on, goes off, comes on. The car you can feel has a slight miss.
Expert:  Tim's Auto Repair replied 1 year ago.

ok,jf you are sure about the ignition module,,you need to test the fuel pressure next,,a bad/weak pump can cause a miss and the code

Expert:  Tim's Auto Repair replied 1 year ago.

to me,it ounds like a bad ignition module still

Customer: replied 1 year ago.
I know the icm is new. Maybe can be defective? This weekend Ill test the fuel pump pressure.
Expert:  Tim's Auto Repair replied 1 year ago.

yes,,the new icm may be bad...

i will give you more tests for the 300 code

Expert:  Tim's Auto Repair replied 1 year ago.

PLEASE COPY AND PASTE the link below to your browser, I have uploaded more info on this there please copy and paste the link below to your main browser[INTERNET EXPLORER or FIREFOX]

.

https://www.dropbox.com/s/3paqxntazr4xav7/0905-lumina-P0300.doc?dl=0

.

if the link doesn’t work that way, try it this way

thanks

.

www.dropbox.com/s/3paqxntazr4xav7/0905-lumina-P0300.doc?dl=0

.

Customer: replied 1 year ago.
ill let you know how I make out.
Expert:  Tim's Auto Repair replied 1 year ago.

please do

thanks