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aaron_sK
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Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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 Posted: Thu Oct 06, 2011 2:47 pm Post subject: |
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| popballz wrote: | | as i had my computer hooked up i moved the tps sensor by itself and the voltage stayed the same. |
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Thu Oct 06, 2011 4:16 pm Post subject: |
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| aaron_sK wrote: | | popballz wrote: | | as i had my computer hooked up i moved the tps sensor by itself and the voltage stayed the same. |
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popballz
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Joined: 18 Nov 2007
Posts: 533
Location: Tacoma, WA
1989 Pontiac Firebird
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| Posted: Thu Oct 06, 2011 5:13 pm Post subject: |
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| Twilightoptics wrote: | | aaron_sK wrote: | | popballz wrote: | | as i had my computer hooked up i moved the tps sensor by itself and the voltage stayed the same. |
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lol does that mean i shouldn't of done that?
and it is deffantly running rich, it totally smeels like gas. when i plugged a paper clip into the aldl connector while drive the ecm said it was adding fuel to the mixture. the "field service mode" makes the light flash like getting the error codes.
| Quote: | Field Service Mode
On the OBDI ECMs, you can jump 'A' and 'B' terminals on the ALDL while the engine is running.
WARNING! This must be done after the engine is running. This is called "Field Service Mode" and will not harm the ECM.
If the ECM is in Open-Loop mode, the SES light will flash rapidly, about 2½ times per second. If it's in Closed-Loop mode, it will flash about once per second. When in Closed Loop mode, flashing less than once per second indicates the ECM is enriching the mixture above the 128 count base line. Flashing more than once per second indicates the ECM is leaning the mixture below the 128 base line. |
^-i thought that that meant that the ecm was detecting a problem and therefore "trying" to fix it be adding more fuel. when the BLM goes down that means the ecm is leaning it out? my spark plugs looked rich also. i replaced my spark plugs with a new set of autolites
i would also like to make sure that you know that i turned the throttle up 1 turn in order to keep the car running at stop lights. when it is running good, it will idle like 1100rpm in park, when it runs bad it is like 700-850 in park
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Thu Oct 06, 2011 6:21 pm Post subject: |
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It means if you worked the throttle... and had live data.... and the TPS voltage didn't change.... your TPS is dead.
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aaron_sK
Member
Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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| Posted: Thu Oct 06, 2011 8:22 pm Post subject: |
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This is odd because Gabe said that during the datalog the TPS was working.
Hook your datalogger back up, turn the ignition on (engine off) and work the throttle while watching the data readouts. It should smoothly move from about 0.54 to about 4.00~4.50 and back down. If it jumps, sticks, doesn't move, ect. it's borked. |
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Alphius
Peanut
Joined: 05 Sep 2006
Posts: 2429
Location: Grand Mound
1984 Chevrolet Camaro Z/28
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| Posted: Thu Oct 06, 2011 8:41 pm Post subject: |
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The TPS definitely worked during the datalog.
It's kind of hard to tell how smooth it was since I wasn't there pushing the pedal or even watching his foot, but everything looked good.
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84 Camaro Z28 - LS1/T56
85 Silverado - Low and Slow |
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popballz
Member
Joined: 18 Nov 2007
Posts: 533
Location: Tacoma, WA
1989 Pontiac Firebird
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| Posted: Thu Oct 06, 2011 8:45 pm Post subject: |
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| aaron_sK wrote: | This is odd because Gabe said that during the datalog the TPS was working.
Hook your datalogger back up, turn the ignition on (engine off) and work the throttle while watching the data readouts. It should smoothly move from about 0.54 to about 4.00~4.50 and back down. If it jumps, sticks, doesn't move, ect. it's borked. |
alright that is a good way to test it. i did see that it changed a little bit while looking at my datalog but i also noticed that it wasnt changeing as much as it should.like some of the time i was accelerating or cruising above idle speed and it would just stay at .41v. if its the same as a 89 2.8 then i got a spare. i was gunna match them up tonight but i didn't get home till it was dark 
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aaron_sK
Member
Joined: 23 Jan 2006
Posts: 8834
Location: Back in beautiful Tacompton
1987 Chevrolet Camaro IROC-Z
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| Posted: Fri Oct 07, 2011 6:34 am Post subject: |
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| popballz wrote: | | if its the same as a 89 2.8 then i got a spare. |
Standard lists the same sensor for pretty much all GM multi-port cars from '85-'89. In '90 the weatherpack changed. |
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Twilightoptics
Hardcore (12sec Club)
Joined: 13 Jan 2004
Posts: 9191
Location: Auburn , WA
1987 Chevrolet Camaro IROC-Z
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| Posted: Fri Oct 07, 2011 10:18 am Post subject: |
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That's why you need to check full range with live data or a DVOM and work the throttle like Aaron and I said. Not the datalog. Or if you datalog. Leave the engine off and just work the throttle smoothly to WOT and then smoothly back to idle and see if it jives.
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