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Help! ECU loses power when rainy

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Old May 31, 2016 | 09:03 AM
  #11  
TOM R's Avatar
Baja
Joined: Mar 2009
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From: south n.j. and ne va.
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A shorted sensor will suck power been there, had the tank pressure switch short and killed TPS voltage, that was fun to diagnose
 
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Old May 31, 2016 | 10:40 AM
  #12  
ihscouts's Avatar
Camel Trophy
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From: Traverse City MI
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I remember, the initial problem was with the TPS. Without seeing the wiring diagram I would've never imagined the fuel tank pressure sensor being tied toether with the throttle....
 
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Old May 31, 2016 | 08:17 PM
  #13  
NickAdams's Avatar
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From: Northern Michigan
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Check out my thread on the DII side: long story short, I had ECU problems. After moderate scrub of connectors, I attacked all sockets on ECU with an entire can of CRC contact cleaner. The good, plastic safe stuff. After seeing one small fleck of corrosion come out of one socket, everything worked great.
 
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Old Jun 3, 2016 | 07:30 AM
  #14  
GRAVZZY's Avatar
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Drifting
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From: Kanadistan
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It's been pretty rainy for 2 days now and I have not been stranded yet. I'm still not too sure I'd take the road with the children... I've spotted than recently I hear a relay tripping under the glovebox when the pavement is extremely corrugated (which is frequent in Quebec and other northern communist countries). This symptom might be related... I've kept on looking for harness damage and dirt in connectors but still nothing convincing... It makes me want to do a diesel conversion even more! Putting a non sealed ECU in the engine bay of an offroad vehicle is just plain dumbness, the components were better protected in every compact car I had before.
 
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Old Jun 3, 2016 | 07:56 AM
  #15  
TOM R's Avatar
Baja
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From: south n.j. and ne va.
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None of the sensor connectors are sealed, clean , dielectric grease them, check for loose grounds, no ground no power

Bumpy roads and clicking relays sound like loose ground or loose connection
 
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