gjh2916 Posted June 30, 2022 Share Posted June 30, 2022 I have a 2001 Monaco Dynasty with 8.3 CAPS Cummins. Drove it a month ago parked it in garage, went out today and it will not start. Engine cranks over fine it just will not fire. Have a FASS fuel system installed and fuel pressure is reading 16 psi. Checked connection on ECM seems OK. I know these engines do not have a fuel shut off solenoid. Looking for suggestions on what to check next. Link to comment Share on other sites More sharing options...
timaz996 Posted June 30, 2022 Share Posted June 30, 2022 (edited) Does it seem to fire one cylinder each rotation? (you will get one puff of grey smoke each rotation) That's what mine did when the CAPS pump failed. Tim Edited June 30, 2022 by Tim-AZ Link to comment Share on other sites More sharing options...
BradHend Posted July 1, 2022 Share Posted July 1, 2022 Is it throwing any codes, either with a code reader or perhaps onboard diagnostic blinking lights up front like my cayman has? I hope it’s not your high pressure pump like my no start condition was last year. Pretty pricey pump. Link to comment Share on other sites More sharing options...
jacwjames Posted July 1, 2022 Share Posted July 1, 2022 X2 on codes. I have 3 fuse holders in my passenger side rear electrical bay associated with the engine/transmission, most of the fuses of for the engine. I'd check those as a starting point. Link to comment Share on other sites More sharing options...
timaz996 Posted July 1, 2022 Share Posted July 1, 2022 1 hour ago, BradHend said: Is it throwing any codes, either with a code reader or perhaps onboard diagnostic blinking lights up front like my cayman has? I hope it’s not your high pressure pump like my no start condition was last year. Pretty pricey pump. X2 Link to comment Share on other sites More sharing options...
jacwjames Posted July 1, 2022 Share Posted July 1, 2022 In the last year on the IRV2.com forum there have been a couple of instances of owners being able to diagnose similar problem and get their rigs back running. One recent one was the ECM bad, had to be replaced. Another was the CAPS pump, there are a couple items that can cause problems. The Transient Suppressor, this is mounted on the side of the engine below the caps pump. The other two are the Fuel Stator, and the Fuel Control Valve. Both are on the attached parts diagram that I downloaded from the Cummins Quickserve site, this is for my engine, yours may be different. All of these can be diagnosed with the computer and insite program. The problem is that Cummins is hesitant to replace just parts on the CAPS pump. The individuals that were able to diagnose these types of problems were very persistent and knowledgeable, far beyond my skill set but I pay attention when problems like this come up and keep in my files. Link to comment Share on other sites More sharing options...
gjh2916 Posted July 2, 2022 Author Share Posted July 2, 2022 I got it started. Disconnect both battery cables and waited a minute and reconnected and it started. I read in the Cummins manual that resets the ECM 1 Link to comment Share on other sites More sharing options...
BradHend Posted July 2, 2022 Share Posted July 2, 2022 Great news! Thanks for the update! 1 Link to comment Share on other sites More sharing options...
tmw188 Posted July 3, 2022 Share Posted July 3, 2022 We will all remember that one! Great to hear. 1 Link to comment Share on other sites More sharing options...
timaz996 Posted July 3, 2022 Share Posted July 3, 2022 Good deal! 1 Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now