Ok guys...checked my code...it's 21
Thread Starter
Safety Car
Joined: Mar 2000
Posts: 4,077
Likes: 27
From: Northeast South Dakota
Ok guys...checked my code...it's 21
I finally today got to check out the code that was stored in the computer on my 81, causing the check engine light to flash briefly after startup. It says 21, so I looked it up in the book and this is what it says:
-TPS circuit open, or voltage out of range (probably high)
-Grounded wide open throttle circuit
What is the deal. It's nothing that I'm going to worry about, just curious as to what is going on. Thanks.
-Justin
-TPS circuit open, or voltage out of range (probably high)
-Grounded wide open throttle circuit
What is the deal. It's nothing that I'm going to worry about, just curious as to what is going on. Thanks.
-Justin
Le Mans Master
Joined: Sep 2000
Posts: 5,635
Likes: 4
From: Orlando Floriduh
Re: Ok guys...checked my code...it's 21 (Dalannex)
That tell the computer what the throttle position is so it can adjust the mixture. I really don't know what a bad one will do on a carbureted set-up. They can run pretty bad on FI's when the TPS is bad.
Thread Starter
Safety Car
Joined: Mar 2000
Posts: 4,077
Likes: 27
From: Northeast South Dakota
Re: Ok guys...checked my code...it's 21 (silvervetteman)
I do have a new TPS in the car. I put it in awhile back when I was trying to get the carb to work. Ended up it wasn't the problem, it was a lack of understanding on how the E4ME works, but now I have it down. That's a long story, no sense in getting into it here. UKPaul should remember the emailing on that problem. ;)
When I put in the new TPS I didn't check the base voltage and adjust it because I couldn't seem to come up with the little plug in that allows easy hookup of a multimeter. That brings me to the next question. Is this little plug in tool, the one that plugs in between the wiring harness and the TPS to allow connection of a multimeter, the same for fuel injection TPS as it is for the carb model? It looks like the same plug so I think it would work, just a little curious? Anybody have one of these that they used on their 81?
I don't think I am going to do any adjusting on it anyway, because it runs like a top. But, if I find a place to get a hold of that connector, I would like to play around to see what the base voltage is on my TPS. (I really like playing with tools and gadgets) :D
When I put in the new TPS I didn't check the base voltage and adjust it because I couldn't seem to come up with the little plug in that allows easy hookup of a multimeter. That brings me to the next question. Is this little plug in tool, the one that plugs in between the wiring harness and the TPS to allow connection of a multimeter, the same for fuel injection TPS as it is for the carb model? It looks like the same plug so I think it would work, just a little curious? Anybody have one of these that they used on their 81?
I don't think I am going to do any adjusting on it anyway, because it runs like a top. But, if I find a place to get a hold of that connector, I would like to play around to see what the base voltage is on my TPS. (I really like playing with tools and gadgets) :D
Racer
Joined: Oct 2000
Posts: 321
Likes: 0
From: Aptos, CA.
Re: Ok guys...checked my code...it's 21 (Dalannex)
You can make your own wires with the weatherpack type connectors. You need three wires that will connect the lead to the TPS, or, you can use a "pin" type lead that will connect to terminal "B" (dark blue) to "C" (black). These are the wires you need to check current with but they all need to be connected to the TPS. Your choice.
The volatage should be .56 at curb idle. You also need to remove small plug in the air horn ring area to access the allen head adjusting screw. This thing can be a bugger to turn and if you ruin the threads or can't turn it, you'll need to pull the air horn and do some work. It contacts a plunger that is spring loaded on the TPS to make the settings.
Engine does not have to be running so you can "blip" the throttle to test your readings.
The volatage should be .56 at curb idle. You also need to remove small plug in the air horn ring area to access the allen head adjusting screw. This thing can be a bugger to turn and if you ruin the threads or can't turn it, you'll need to pull the air horn and do some work. It contacts a plunger that is spring loaded on the TPS to make the settings.
Engine does not have to be running so you can "blip" the throttle to test your readings.
Le Mans Master
Joined: Apr 2001
Posts: 5,941
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From: Was New Orleans but swam to Baton Rouge LA
Cruise-In IX Veteran
Re: Ok guys...checked my code...it's 21 (Dalannex)
The car want a drink. It is trying to tell you it is 21 years old and legal now. :cheers:
Mark B.
Mark B.
