service engine light
Thread Starter
Junior Member
Joined: Oct 2013
Posts: 60
Likes: 0
From: Red Lake Falls,MN
Car: 1987 Z28 Vert.
Engine: LG4: ENGINE, GAS, 8 CYL, 5.0L, 4BBL
Transmission: MD8: 4 SPEED AUTO THM700R4
Axle/Gears: GU2: AXLE, REAR 2.73 RATIO
service engine light
Would you be able to read the obd1 codes or us a code scanner if your SEl
stays on all the time?
stays on all the time?
Supreme Member
Joined: Jun 2011
Posts: 2,036
Likes: 5
From: knoxville tn
Car: 86 IROC
Engine: 5.0 TPI
Transmission: 700-R-4
Axle/Gears: 2.73 open
Junior Member
Joined: Mar 2013
Posts: 85
Likes: 0
From: Walton, IN/Rensselaer, IN
Car: 1984 camaro berlinetta
Engine: v8
Transmission: 700r4
Re: service engine light
from another thread i read on here when i was having the same type of symptom with mine(i interpret yours is on even if the key is just turned to the on position? never turns off as long as the dash is on?) if it turns on right away even before the engine is on and doesnt turn off or it flickers very fast then the prom is fried, according to that thread, which i dont know where/what is. i dont know that that is necessarily true, but could hold fact as i have since ran into other problems that tell me the computer is fried(or at least thats the simplest solution). i would recomend checking your fuses if any are blown replace, i think its the 3 or 5 amp goes to the computer. also then pull the codes and if you get mulltiple codes that contradict eachother then my money would be on the computer is fried, but i am not an expert by any means and could very well be very wrong.
Joined: Sep 2005
Posts: 27,867
Likes: 2,429
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: service engine light
Probably. That being the way it usually works.
What were your codes when you read em? (which it would have taken less time to try, than to post on the Internet about it)
What were your codes when you read em? (which it would have taken less time to try, than to post on the Internet about it)
Thread Starter
Junior Member
Joined: Oct 2013
Posts: 60
Likes: 0
From: Red Lake Falls,MN
Car: 1987 Z28 Vert.
Engine: LG4: ENGINE, GAS, 8 CYL, 5.0L, 4BBL
Transmission: MD8: 4 SPEED AUTO THM700R4
Axle/Gears: GU2: AXLE, REAR 2.73 RATIO
Re: service engine light
I have parts to build a ALDL cable and will try that.
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Thread Starter
Junior Member
Joined: Oct 2013
Posts: 60
Likes: 0
From: Red Lake Falls,MN
Car: 1987 Z28 Vert.
Engine: LG4: ENGINE, GAS, 8 CYL, 5.0L, 4BBL
Transmission: MD8: 4 SPEED AUTO THM700R4
Axle/Gears: GU2: AXLE, REAR 2.73 RATIO
Re: service engine light
If this car was changed from tpi to carb, would the ecm even need to be connected?
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Joined: Dec 2012
Posts: 629
Likes: 2
From: Western NY
Car: 88 convertible
Engine: 5.7L
Transmission: 4+3 maual
Axle/Gears: 3.07
Re: service engine light
For carb swap, you don't need the ECM except for maybe your speedo and/or TCC if it is controlled by the ECM. As far as the CEL, it is useless and should be disabled (remove the bulb). 99.9% of the ECM's job is fuel injection control and emissions. Since you've taken that out, no need for the ECM except as stated above.
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