blk_legacy Posted March 23, 2019 Share Posted March 23, 2019 Hi everyone just starting to work on my 05 Legacy GT. Previously I have only worked on BC legacy's so all the electronics is proving more challenging. I bought it as a non running vehicle. So far I have: - replaced the intake - replaced fuel pump - replaced coils - replaced spark plugs - checked for codes It cranks but doesn't fire... Any ideas on next steps? Cheers Link to comment Share on other sites More sharing options...
08SpecB_DE Posted March 23, 2019 Share Posted March 23, 2019 Do you have rpm signal? Sometimes you will see the tach move but a scanner would be best to use as it will only be around 200 rpm. If you have rpm signal, check for spark and fuel. Does the motor sound like it has good compression when cranking? Link to comment Share on other sites More sharing options...
blk_legacy Posted March 24, 2019 Author Share Posted March 24, 2019 Hmmm not rpm registering on the gauge. I'll get a scanner in the next few days. (Any recommendations?) I just noticed that the check engine light blinks whilst cranking. So hoping a scanner might pull something up. Compression sounds good. Link to comment Share on other sites More sharing options...
blk_legacy Posted March 24, 2019 Author Share Posted March 24, 2019 Update. Checked the codes and pressed the button to scroll through. Didn't know that was a thing. Currently getting: P1718 C0102 C0109 Link to comment Share on other sites More sharing options...
blk_legacy Posted March 25, 2019 Author Share Posted March 25, 2019 Ok found that the ground on the engine wasn't connected so bolted it up. Also, the knock sensor was loose so tightened that. Wow that's a tough one to get at. Checked the cranking voltage, battery is at 12.7 (new battery) but drops to around 11.5 whilst cranking. Any idea if this is expected? Could the starter or alternator cause this? Link to comment Share on other sites More sharing options...
apexi Posted March 25, 2019 Share Posted March 25, 2019 That droppage while cranking is nothing, my car drops a lot more than that when cranking (1 year old weak oem Subaru battery, I think that's why). I've been down to like, 9.7V while cranking which I hear isn't good, but my car has fired up every time. I think I've heard that anything over 10 or 10.5 volts when cranking is fine. Link to comment Share on other sites More sharing options...
blk_legacy Posted March 25, 2019 Author Share Posted March 25, 2019 OK thanks. Just waiting on the scanner. Will update once it arrives Link to comment Share on other sites More sharing options...
apexi Posted March 25, 2019 Share Posted March 25, 2019 I did a little research, and I'm kind of curious to know what the voltage coming from the alternator is when the car is running. P1718 and c0109 are kind of vague, but c0102 has to do with the rear wheel speed sensor. Also, there are two ground straps under the engine, on opposite sides towards the front I think? Doesn't hurt to make sure both of those are good, even though you might have already checked one or both Link to comment Share on other sites More sharing options...
blk_legacy Posted March 25, 2019 Author Share Posted March 25, 2019 Unfortunately that car isn't running to test voltage. However, I have seen some info on P1718 being hit when an auto is moved around in neutral and you can only reset the TCU with a logger/dongle. So waiting to try that. C0102 has cleared now. Link to comment Share on other sites More sharing options...
blk_legacy Posted April 19, 2019 Author Share Posted April 19, 2019 OK for those playing at home! Got the VAG cable and ecuExplorer going! Took a little while but once I figured out which USB port and changing the bord rate to 4800 it worked like a treat. So we have: P1518 - Starter switch circuit low input P1151 - O2 P1152 - O2 P0700 - Request AT MIL On Link to comment Share on other sites More sharing options...
apexi Posted April 19, 2019 Share Posted April 19, 2019 How does the connector for the front oxygen sensor look? Link to comment Share on other sites More sharing options...
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