mpi running rich at idle
06-12-2015 | 06:04 AM
#13
Registered
Joined: Nov 2004
Posts: 14,089
Likes: 3,677
From: On A Dirt Floor
I pulled the jasper motor out when I bought due to water in oil! It had a super charged motor in it guy pulled it put a jasper create motor in. Didnt winterize it so I had manifolds tested they were good put new starter every thing you could think of is new. The long block was $6,000 then $$$$$$ from there. Don't get me wrong it runs great fires up first turn of the key. It just runs rich the back of the boat has a kinda grease film after being out and plugs look to be running rich.
So......you need to do some CSI work.
WAG don't wok well even on stock motors. Less so on those that have had non OE changes made.
06-12-2015 | 06:58 AM
#14
Registered
Joined: Aug 2012
Posts: 2,301
Likes: 404
From: Collierville, TN and Pickwick Lake
If he was running a SC and using the EFI system, chances are he had pogamming done. Depending on the SC he may have had lage injectors put in to....it's possible.
So......you need to do some CSI work.
WAG don't wok well even on stock motors. Less so on those that have had non OE changes made.
So......you need to do some CSI work.
WAG don't wok well even on stock motors. Less so on those that have had non OE changes made.
06-12-2015 | 09:13 AM
#19
Platinum Member
Joined: May 2012
Posts: 11,424
Likes: 3,953
From: Midwest & T-Rock
IMO, you may have multiple things to address, sooner or later its going to foul the plugs so bad that they wont refire, I would find someone you can trust and send them the ecm and see whats in it, or put up with it for the summer and do it later, but with out scanning it you don't know if its sensor related or not, such as a map
