502 efi runs WOT at start ??????
502 efi runs WOT at start ??????
1999 502 mag Efi, Bought boat with motor out,reinstalled new motor but it runs at WOT at start. Have tried to shut down and restart but get the same thing. Anyone have any advise Thanks
06-25-2003, 08:14 PM
#2
I hate the winter!!
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I am sure that you checked the obvious, like sticking or mis-adjusted throttle cables... So, after that, I would scan for codes with the engine off, take a good look at the I.A.C. count and the t.p.s. The I.A.C. should be somewhere between 20 and 40. The t.p.s. should be a low percentage about 5% at idle. If you don't have a scanner, I would pull the I.A.C. motor and check it out.
Last edited by Vinny P; 06-25-2003 at 08:16 PM.
06-25-2003, 10:11 PM
#4
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I have to ask the obvious. Pull the flame arrestor off. Are the butterflies open or closed?
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06-26-2003, 08:31 AM
#5
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Originally posted by obnoxus
I have to ask the obvious. Pull the flame arrestor off. Are the butterflies open or closed?
I have to ask the obvious. Pull the flame arrestor off. Are the butterflies open or closed?
06-26-2003, 08:42 AM
#6
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An EFI still has butterflies, GLH.
(and they are behind a flame arrestor)
Also, a vacuum leak could cause the motor to run at high rpm on startup, too. WOT startup would be a scary ordeal...
(and they are behind a flame arrestor)
Also, a vacuum leak could cause the motor to run at high rpm on startup, too. WOT startup would be a scary ordeal...
06-26-2003, 11:55 AM
#7
Charter Member #1171
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Originally posted by GLH
I think EFI is the operative letters in his description!
I think EFI is the operative letters in his description!
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I want to live in a world where a chicken can cross the road and not have its motives questioned.
I want to live in a world where a chicken can cross the road and not have its motives questioned.
06-26-2003, 01:37 PM
#9
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Do a search here for IAC... or TPS...
There is a thread I wrote on how to check & adjust the TPS & IAC, also how to test the IAC motor....
It is in the tech Q&A section.
There is a thread I wrote on how to check & adjust the TPS & IAC, also how to test the IAC motor....
It is in the tech Q&A section.
