:::RHMT::: Real Home Made Turbo
General Category => Engine Management => Topic started by: marcj on June 17, 2009, 02:34:21 PM
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I am really confused at this point.. I just finished installing my 780cc injectors and the car was running like shit. So I look at datalogs, idle is at 19.9 AFR, this is a tune JD did for someone else on a similar setup, so I decided to make my own basemap in crome gold.. still no good. then I notice the TPS says 0% when i rev it up in the logs.. check the voltage and I get 0 volts at any position.
So, I've checked the actual wire all the way to the ecu, and it's good. I tested it by grounding a 9volt battery on one end meeting the sensor and checked it at D11 on the ecu side.. it's all good.
Not sure what to do at this point.. I tried another ECU and TPS .. what now???
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I am really confused at this point.. I just finished installing my 780cc injectors and the car was running like shit. So I look at datalogs, idle is at 19.9 AFR, this is a tune JD did for someone else on a similar setup, so I decided to make my own basemap in crome gold.. still no good. then I notice the TPS says 0% when i rev it up in the logs.. check the voltage and I get 0 volts at any position.
So, I've checked the actual wire all the way to the ecu, and it's good. I tested it by grounding a 9volt battery on one end meeting the sensor and checked it at D11 on the ecu side.. it's all good.
Not sure what to do at this point.. I tried another ECU and TPS .. what now???
Which tps wire did you check? The B+ source or the signal wire back to the ecu? Do you have a good ground at the tps plug?
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so far I have checked voltage between the grn/blck and yel/blu.. was only .25 volts
i get nothing from the blck/red wire from either end.
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TPS plug disconnected, multimeter set to ohms, check continuity between red/blk wire tps plug pin 2, and ecu plug D pin 1.
Check continuity between pin 3 TPS plug, yel/blu and Plug D pin 10 ecu side.
Multimeter back to Volts, with key on/engine off you should have power (.5v ish) at pin 1 of the tps plug, grn/blk.
Ignore D11, its SG2 for the ecu, but not where you need to be.
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TPS plug disconnected, multimeter set to ohms, check continuity between red/blk wire tps plug pin 2, and ecu plug D pin 1.
Check continuity between pin 3 TPS plug, yel/blu and Plug D pin 10 ecu side.
Multimeter back to Volts, with key on/engine off you should have power (.5v ish) at pin 1 of the tps plug, grn/blk.
Ignore D11, its SG2 for the ecu, but not where you need to be.
OHMs from red/blk -> D1 = 4.52
OHMs from yel/blu -> D10 = counted down to .86 then up to .94 and I ended it there
Volts from grn/blk = 0v with key on
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You have PM.
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fixed it!! thanks robbmiester
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What was the problem?
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i'm not exactly sure to be honest.. I THINK one of the pins at the obd2->obd1 jumper harness for the TPS wasn't making a connection. who knows. after messing with the pins Robb referred (D10, D1, etc.) it worked. 3 solid hours of my life, gone forever :-\
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You better find out what happened, it may test the soles of your shoes soon
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You better find out what happened, it may test the soles of your shoes soon
what? i've been hit by a coil before.. hurts like shit, but it's nothing to worry about.
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LOL, I think he means that you better get it figured out so that it doesn't happen again, and leaves you walking. :P
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LOL, I think he means that you better get it figured out so that it doesn't happen again, and leaves you walking. :P
it's all good, I will probably swap the whole engine harness eventually.. I see them at the junk yard all the time.
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LOL, I think he means that you better get it figured out so that it doesn't happen again, and leaves you walking. :P
Ding ding ding
Nothing like being broke down over some stupid shit
It is guaranteed to happen when your about to show off for some hot ass chick
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Did you hot-glue your obd2>1 jumper harness? I always hot-glue the back side of the connectors to prevent that exact problem.
As shown here.
(https://realhomemadeturbo.com/forum/proxy.php?request=http%3A%2F%2Fwww.raceaxis.com%2Fimages%2Fjumperharnessobd0-1.jpg&hash=e4177bc8fb0284ed1dad561369a0d91631e91590)