Haven Posted August 26, 2018 Share Posted August 26, 2018 Hey folks, My son scored a sweet RBP 5MT LGT sedan with 212K miles. Ran fine but seller said it had rod knock. We could not hear it but due to mileage we tore it down and refreshed bearings, rings, gaskets, etc. Turns out it had a single burned exhaust valve. Anyway, this is like the 12th motor we have done with every one coming to life at first start. This one, however, would not start. Timing is dead on, valve clearances checked and in spec, but we discovered no spark signal to cylinders 2&3. Coil packs and plugs to those cylinders work perfectly when connected to 1 or 4 leads. Spark plugs are wet with fuel. Grounding straps are connected. We removed covering from main plug to packs on #3 and wires looked fine. I swapped ECU from my other 2005 LGT 5MT with no change. Nothing was done to the intake manifold and wiring harness other than new intake/TGV gaskets and splicing in a coil pack plug end on #3. Is there a security shutdown or something? This car is super baffling and frustrating at this point. Anyone gone through this before? THANK YOU!!! Link to comment Share on other sites More sharing options...
moral hazard Posted August 26, 2018 Share Posted August 26, 2018 Can you pull any error codes via the obd port? Link to comment Share on other sites More sharing options...
bigBADbenny Posted August 27, 2018 Share Posted August 27, 2018 One possible google answer was to check continuity/signal/volts for cam and crank position sensors... Link to comment Share on other sites More sharing options...
Haven Posted August 27, 2018 Author Share Posted August 27, 2018 Can you pull any error codes via the obd port? No codes at all... Link to comment Share on other sites More sharing options...
Max Capacity Posted August 31, 2018 Share Posted August 31, 2018 Check for bent pins in the main harness connector...I'm guessing. The service manual may help. http://people.csail.mit.edu/ilh/vacation/ 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
Haven Posted September 1, 2018 Author Share Posted September 1, 2018 I have Free SSM and free time this weekend so hoping to get this thing going. Thanks for all the input! Link to comment Share on other sites More sharing options...
Haven Posted September 1, 2018 Author Share Posted September 1, 2018 Ok folks, here is an update. Couldn't get Free SSM to connect so that was not useful and may not have been anyway. So, we checked/cleaned and replaced grounding straps on heads and rail on intake manifold. Found out brand new battery was stone dead AGAIN so something is draining it in two days or less. Swapped good battery and no fire- same issue. Cranks great though. In order to eliminate the wiring as a problem, we swapped an entire intake manifold with wiring harness from a running car to his car. No change at all. So the only thing left to test ECM is to swap it into a known running car. Recall that the running car had its' ECM put in my sons car and it did not run. So put son's ECM into running car and it would not fire either. So question is, if ECM from son's car is bad why won't it run with known good one? The part numbers are different so maybe that is the reason? His is 22611AJ17E and mine is 22611AJ17B. If they ARE compatible what else in the system will cause a no start in both vehicles? Link to comment Share on other sites More sharing options...
Max Capacity Posted September 2, 2018 Share Posted September 2, 2018 Is there something about the ECU and the Keys being married together. The service manager at the local dealership may be some help. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
laz Posted September 2, 2018 Share Posted September 2, 2018 Is there something about the ECU and the Keys being married together. The service manager at the local dealership may be some help. This. I don’t think you can just swap computers and have it work doento the security system. --- Link to comment Share on other sites More sharing options...
08SpecB_DE Posted September 3, 2018 Share Posted September 3, 2018 (edited) My guess is a ground wire somewhere. Did you try applying your own ground to 2 and 3 to see if the car would start? I cant access any wiring diagrams but they must be tied together somehow. Edited September 3, 2018 by 08SpecB_DE Didnt read first post Link to comment Share on other sites More sharing options...
Haven Posted September 5, 2018 Author Share Posted September 5, 2018 My guess is a ground wire somewhere. Did you try applying your own ground to 2 and 3 to see if the car would start? I cant access any wiring diagrams but they must be tied together somehow. All ground wires are cleaned and present. Swapping complete wiring harness from another car didn't change anything (other than our frustration level). Ugh Link to comment Share on other sites More sharing options...
moral hazard Posted September 6, 2018 Share Posted September 6, 2018 So recently I rebuilt my ej25. Car wouldn't fire up, just cranking forever. Found my issue to be as simple as 2 connectors interchanged just like this post: https://legacygt.com/forums/showpost.php?p=5287415&postcount=15 I know you've checked the wiring already, but it would be something I'd double check. Link to comment Share on other sites More sharing options...
Tehnation Posted September 6, 2018 Share Posted September 6, 2018 I would put back the original ecu, and try the other harness, harnesses are swappable but ecu's definitely aren't. Ecu's are a pita for a lot of cars, and your using two different part numbers at that, that's a big no bueno! But if you got the same response from two different ecu's your original is probably fine. Link to comment Share on other sites More sharing options...
Haven Posted August 4, 2019 Author Share Posted August 4, 2019 Hey folks! At long last we figured it out. Dowel pin in passenger cam was pushed in so cam gear was not clocked. Thanks again for all the help here! Link to comment Share on other sites More sharing options...
bigBADbenny Posted August 4, 2019 Share Posted August 4, 2019 That’s great! How’d you find the correct diagnosis? Rough guess: logging avcs vvt angles, total timing etc? Link to comment Share on other sites More sharing options...
Haven Posted August 5, 2019 Author Share Posted August 5, 2019 That’s great! How’d you find the correct diagnosis? Rough guess: logging avcs vvt angles, total timing etc? Well... here was part of the problem- a few of the OBDII connector pins were pushed in so we could not connect to a code reader or FSSM. Found that out later after scrapping the car thinking it was electrical issue in the dash= we found MICE. So after doing all the diagnostics possible without a viable connection to the ECU, we pulled the motor. Absolutely knew it was on the mechanical operation of the longblock as the issue moved between cars, three different wiring harnesses, and all sensors worked fine on other cars. So removed the intake cams. BAM! there it was. The amount of misery, time, money and wasted cars that little pin caused is almost unfathomable. Link to comment Share on other sites More sharing options...
Haven Posted August 5, 2019 Author Share Posted August 5, 2019 And for those about to rip on the cam seal- I had already taken the cam bracket off- just took a pic for posterity! Link to comment Share on other sites More sharing options...
Tehnation Posted August 5, 2019 Share Posted August 5, 2019 how did that happen? Link to comment Share on other sites More sharing options...
bigBADbenny Posted August 5, 2019 Share Posted August 5, 2019 Thanks very much for the follow up Link to comment Share on other sites More sharing options...
Tehnation Posted August 5, 2019 Share Posted August 5, 2019 is that normal? how did the pin get pushed in so far? I thought that pin could only go in so far? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now