giiyanman Posted May 3, 2018 Share Posted May 3, 2018 Buckle up girls and boys, this is going to be a very detailed post as I try to diagnose what exactly the issue is on my B4 RSK. I've only had this car for a month now, got it from a local Kijiji ad at 108k kms. Car body's in good condition for a 17 yr old car, but the engine could do better. Recently I have been having rough starts/idles when I start the car cold (for example in the morning before work), and CEL momentarily comes on. In this video you can see what I am talking about, although this start is already mid-day so it is not as bad. The issue usually goes away once the car warms up after a few minutes. Cruising during the day, the car seems fine although there are rare bouts of hesitation and sudden shift downs when I let go of the gas. When the night comes and I have my HIDs, fog lights and A/C on, the rough idle intensifies and even comes back when I'm stopped for a red light (this doesnt happen when A/C, HIDs, and fog lights are off. During cold/wet days, the belts squeal from a cold start although it usually goes away within 20 secs. I also have a fuel leak somewhere in the engine bay: a very small puddle of gas forms under the engine, more onto the passenger's side, when I start the car in the morning The smell is noticeable if you step out of the car. However once the car warms up or if I start it on a warm midday, I do not see puddles when I pull out of my parking spot. So, with these symptoms what do you guys think is my issue? My suspects are either bad spark plugs, bad fuel delivery at start or loose belts/bad tensioners/pulleys or a bad alternator. Thoughts? Link to comment Share on other sites More sharing options...
gillbates Posted May 5, 2018 Share Posted May 5, 2018 I know I'm stating the obvious here, but first thing I would do is to try to pull that code with a scanner Link to comment Share on other sites More sharing options...
giiyanman Posted May 6, 2018 Author Share Posted May 6, 2018 I know I'm stating the obvious here, but first thing I would do is to try to pull that code with a scanner I've tried to read the code with an OBD-2 scanner but it could not properly read any codes. Are JDM third gens even OBD-2 compliant? Link to comment Share on other sites More sharing options...
giiyanman Posted May 7, 2018 Author Share Posted May 7, 2018 Updates: After a bit of searching through other online forums, I've found threads with similar issues with regards to my rough idle. A common problem among them is, as I suspected, the alternator. I'd like to try and replace this myself. Can I find compatible alternators here in Canada? Or do I have to order it from Japan? Link to comment Share on other sites More sharing options...
giiyanman Posted May 15, 2018 Author Share Posted May 15, 2018 Updates: replaced my alternator yesterday and all my issues with the rough engine went away. No more check engine lights. I still have the smell of fuel in the A/C after startup though. That puddle which I thought was gas turned out to be just water/builtup moisture. Link to comment Share on other sites More sharing options...
Stickee Posted May 17, 2018 Share Posted May 17, 2018 I've tried to read the code with an OBD-2 scanner but it could not properly read any codes. Are JDM third gens even OBD-2 compliant? From what I understand, the Rev D Legacys are OBD-2. Where did you end up sourcing an alternator? I have my Rev D wagon coming in in a couple weeks so I'm trying to gather info on what parts are compatible with USDM cars. Link to comment Share on other sites More sharing options...
giiyanman Posted May 18, 2018 Author Share Posted May 18, 2018 From what I understand, the Rev D Legacys are OBD-2. Where did you end up sourcing an alternator? I have my Rev D wagon coming in in a couple weeks so I'm trying to gather info on what parts are compatible with USDM cars. I tried with my Android compatible OBD2 scanner and it would read a code for the first few minutes, after which the app hangs and stops communicating with the device. I found an alternator through a friend working for a dealership's parts store. He hooked me up with a 90A Denso alternator. I'll get the part number for you when I get home Link to comment Share on other sites More sharing options...
giiyanman Posted May 20, 2018 Author Share Posted May 20, 2018 Where did you end up sourcing an alternator? I have my Rev D wagon coming in in a couple weeks so I'm trying to gather info on what parts are compatible with USDM cars. I found an alternator through a friend working for a dealership's parts store. He hooked me up with a 90A Denso alternator. I'll get the part number for you when I get home It is a Denso 210-4140 Alternator. Retails for about $300, re-manufactured. Link to comment Share on other sites More sharing options...
Setnev Posted May 22, 2018 Share Posted May 22, 2018 From what I understand, the Rev D Legacys are OBD-2. OBD-2, very probable, but OBD2 is not a requirement in Japan, so the chances of it even being a commonly supported protocol are very slim. Link to comment Share on other sites More sharing options...
Psedog Posted May 28, 2018 Share Posted May 28, 2018 I have a 2001 B4 (JDM 2002 Model). I use BtSsm on android to interface with the OBD2 port. Link to comment Share on other sites More sharing options...
giiyanman Posted May 31, 2018 Author Share Posted May 31, 2018 I'll be getting a BlueSSM from ProjectLambda within this week to get mine retuned for 94 octane. Not sure if that will work with android interfaces though. On that note would it be safe to change my engine's fuel base map on a regular basis? For example I will flash with a 94 tune for the summer, and turn it down to 91 tune for the winter? Link to comment Share on other sites More sharing options...
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