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Old 01-12-2019, 11:42 PM
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rang-a-stang rang-a-stang is offline
360 AMC
 
Join Date: Oct 31, 2016
Location: Camarillo, CA
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Does my check engine light need a ground or 12v?

Every diagram I see for TBIs just shows a line to the Check Engine/Service engine soon/Malfunction Indication light. I assumed the computer applied 12v to light the light. Or do I apply 12v to the light and the computer grounds it to turn it on?
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Old 01-13-2019, 09:00 AM
wiley-moeracing wiley-moeracing is offline
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I believe it is ground switched. not 100% sure on yours.
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Old 01-13-2019, 10:45 AM
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babywag babywag is offline
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Quote:
Originally Posted by rang-a-stang
Or do I apply 12v to the light and the computer grounds it to turn it on?

This ^

You sure you don't want to break in your new engine w/ a carb before experimenting/debugging a TBI install??
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
1994 Caprice wagon
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Old 01-13-2019, 08:06 PM
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rang-a-stang rang-a-stang is offline
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Quote:
Originally Posted by babywag
You sure you don't want to break in your new engine w/ a carb before experimenting/debugging a TBI install??
HAHAHA!!! I am definitely making your point for you, aren't I! LOL!
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Old 01-13-2019, 08:57 PM
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babywag babywag is offline
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@ minimum should monitor data to try and make very certain it isn't too lean.
too lean and you risk chewing up cylinder(s) and/or piston(s).

what is your plan on a .bin?
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'88 GW (aka Babywag) and '90 GW (aka JUNKbucket) both fuel injected
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Old 01-13-2019, 10:33 PM
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Curly5759 Curly5759 is offline
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Join Date: Mar 08, 2015
Location: Verde Valley, Arizona
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PCM is the ground for the light. Back in the day, when we wanted the CEL to flash codes, we would put a jumper wire between socket A and B on the ALDL (Assembly line Diagnostic link) It's called the DLC on OBD 2 vehicles.
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Old 01-14-2019, 10:33 AM
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rang-a-stang rang-a-stang is offline
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Join Date: Oct 31, 2016
Location: Camarillo, CA
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Quote:
Originally Posted by babywag
@ minimum should monitor data to try and make very certain it isn't too lean.
too lean and you risk chewing up cylinder(s) and/or piston(s).

what is your plan on a .bin?
Will do. I downloaded ProTuner this weekend and am watching videos on how to use it.

.bin: I have one computer from a stock 95 350 and also bought this setup:
http://www.ifsja.org/forums/vb/showthread.php?t=186447
He had it on his 440 which is very similar to my build: Similar cam, similar compression, headers, timing control, etc. I know I will need to tune but his .bin should be in the ball park for me and close enough to break in the cam? I am using his injector pod now (28psi, I verified it this weekend) and computer. I hope to get into that .bin this week and see what's in there. ProTuner is all new ground for me so I have a steep learning curve. Luckily there is tons of info out there, I just need to spend the time to learn it.
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