Throttle position
10-12-2003, 05:21 AM
#1
Platinum Member
Platinum MemberThread Starter
Join Date: Aug 2003
Location: Florida
Posts: 96
Likes: 0
Received 0 Likes
on
0 Posts
Throttle position
When I hook up the mercruiser scan tool to my 502 MPI the scan only shows 75% throttle opening when I have the throttles wide open. The buttleflys are open all the way when you look at them at wide open thru the throttle body. Will this affect top end or is this just the way the computer is programmed ?
10-12-2003, 07:55 AM
#2
Charter Member #1055/Moderator
Charter Member
Yes, that will affect the fuel curve. The injection timing will probably never go asynchronous @ WOT. Probably just need a new TPS.
__________________
[img][/img]
[img][/img]
10-12-2003, 08:20 AM
#3
Official OSO boat whore
Charter MemberJoin Date: Oct 2000
Location: Mequon, WI
Posts: 6,157
Likes: 0
Received 0 Likes
on
0 Posts
I'm thinking TPS. Try adjusting it first. You might just get lucky.
10-12-2003, 10:34 PM
#4
Platinum Member
Platinum Member
TPS.
Disconnect the throttle cable and check TPS output voltage at idle and WOT, and also slowly move from one extreme to the other and the voltmeter needle should swing smoothly with it with no jumping around or dead spots..
Disconnect the throttle cable and check TPS output voltage at idle and WOT, and also slowly move from one extreme to the other and the voltmeter needle should swing smoothly with it with no jumping around or dead spots..
