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Ask Don 'Mo Lurch' Your Own Que...
Don 'Mo Lurch'
Don 'Mo Lurch', Aftermarket & Factory Electronics
Category: Chrysler
Satisfied Customers: 522
Experience:  Cert. Chrysler Warnty, Heavy Line Mech, Mobile Electronics. Sales, Installation & Repair for 30 years
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Check engine light on. Misfire cyclinder 8, stay on, 2007

Customer Question

check engine light on. Misfire cyclinder 8
JA: Does the light stay on, or does it blink?
Customer: stay on
JA: What is the model/year of your Chrysler?
Customer: 2007 300 c hemi 5.7
JA: Are you fixing your 300 yourself? What have you tried so far?
Customer: replace all 16 spark plugs and coil on cyclinder 8
JA: Anything else you want the mechanic to know before I connect you?
Customer: runs fine but shakes while idiling or sitting at stop light , sign or stop and go traffic
Submitted: 1 year ago.
Category: Chrysler
Expert:  Ron replied 1 year ago.

Hello. My name is ***** ***** I am happy to assist you today. Give me just a moment to review your post, and I'll be right back with the help you need.

Expert:  Ron replied 1 year ago.

Have you checked to see if you have injector pulse as well as spark from the new coil on this cylinder?

Dose the cylinder have good compression?

Customer: replied 1 year ago.
I guess
Expert:  Ron replied 1 year ago.

Your going to need to check it to be sure

Customer: replied 1 year ago.
let me ask and see
Expert:  Ron replied 1 year ago.

Okay let me know and we can work.

Customer: replied 1 year ago.
he said there was a spark from the new coil
Expert:  Ron replied 1 year ago.

Okay what about injector pulse, as well as the compression.

Customer: replied 1 year ago.
compression was good
Expert:  Ron replied 1 year ago.

In order for the cylinder to fire you need good park at the spark plug, injector pulse and good compression, if your sure you have good spark as well as good compression then you need to check and see if your getting injector pulse. Has that been done?

Customer: replied 1 year ago.
getting injector pulse
Expert:  Ron replied 1 year ago.

Okay something has to be being over looked here, if you have good spark, injector pulse as well as proper compression the cylinder should fire. Are you sure you have all three?