99 Air Nautique won't crank
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=41516
Printed Date: October-06-2024 at 10:20pm
Topic: 99 Air Nautique won't crank
Posted By: rcchemtech
Subject: 99 Air Nautique won't crank
Date Posted: July-14-2017 at 6:47pm
99 air nautique gt 40
Will not run, turns over has spark at plug wire, has fuel pressure at the injector rail. new relays on the back of the motor. I pulled a spark plug and it shows no fuel in cylinders. I do get voltage at the injector while turning over the motor. The issue showed up early this year and while troubleshooting somehow resolved the issue for about 4 hours on the lake. The boat was at an idle and just quit and has not refired since. I have replaced the cap, rotor and coil. What sensors or parts could cause this issue,, TFI? MAP? Distributor?
|
Replies:
Posted By: desertskier
Date Posted: July-14-2017 at 6:55pm
|
http://www.correctcraftfan.com/forum/forum_posts.asp?TID=25584&title=poor-mans-gt40-diagnosis" rel="nofollow - This thread might help
|
Posted By: Dreaming
Date Posted: July-14-2017 at 8:04pm
Do you also have fuel Flow at the rail when the pumps are running? HP pump could be giving you pressure, but low pressure pump could fail and not provide fuel to the HP pump. Welcome to the forum... Brian's google docs spreadsheet does have a cleaning the connections at the ECM as a fix for this issue, may not be your issue, but would sure be worth a try.
|
Posted By: rcchemtech
Date Posted: July-14-2017 at 8:35pm
Thanks,
I have fuel while turning the engine over, I am going to clean the connections now
|
Posted By: fgroce
Date Posted: July-14-2017 at 11:13pm
Do you have a high pressure fuel gauge? Should have about 39 plus or minus 3 at the schrader valve on the manifold, the injectors will not work properly with much less. You can get a set of noid lights to test the signal going to the injectors.
-------------
FGroce
88 Ski Nautique
For 28 years
Now 2002 Ski Nautique
|
Posted By: rcchemtech
Date Posted: July-15-2017 at 11:37am
|
Thanks I have 37-38 PSIG at the rail,
|
|