jimkelly1964 Posted September 24, 2016 Share Posted September 24, 2016 my 1990 legacy sedan automatic suffered a few stall outs while driving to local mcdonalds yesterday. last night I had to drive the car 3hrs on highway to home. it stalled out once at a traffic light and tried to stall out several times while driving, usually when slowing down or speeding up. the solution was to desperately mash and unmash the gas peddle to avoid the stall, till engine would run smoothly again. today I started it up and let it idle but it would stall out from time to time, usually within a few minutes. i'm thinking bad gas, bad fuel pump, bad fuel filter. my cruise also works barely once in a while though i assume this is not rerlated. what are your thoughts? thanks jim Link to comment Share on other sites More sharing options...
RumbleRumble Posted October 2, 2016 Share Posted October 2, 2016 Sounds like cam position sensor. You can try changing the fuel filter and running seafoam or something similar like heet (also made by stabil) since CPS are pretty expensive for that car. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 3, 2016 Author Share Posted October 3, 2016 rumble thanks : ) i did change the fuel filter on sunday, yesterday, even after change car stumbled during a 2 mile drive, so i let it idle in my driveway for 2 hours and i think it stalled once. i drove car today for 3 hours with one major stumble and one small stumble and maybe a few i was not sure about. this was much better than the other day. the fuel in the old filter was chocolate in color and murky. http://www.914world.com/bbs2/uploads/post-2460-1475425812_thumb.jpg Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 3, 2016 Author Share Posted October 3, 2016 rumble is cps a sensor that is known to go intermitant? i have 2 ej22's under my desk at work. guess i will swap out the cps this week.http://www.914world.com/bbs2/uploads/post-2460-1475525521.jpg jim Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 3, 2016 Author Share Posted October 3, 2016 one thing i forgot to mention was my car flashes 16 times ( i think 16) every time i start it. it is a car i got only earlier this year from orig owner older woman. one thing is this car does not seem to have both green diagnostic plugs. i can only find one : ( but even though it has always flashed at start up, it ran fine till last week, but i have only been driving it regularly for 2-3 months. video about changing cam pos sensor Link to comment Share on other sites More sharing options...
RumbleRumble Posted October 3, 2016 Share Posted October 3, 2016 I'd run the seafoam through the engine 6oz in the vacuum line and the rest in the tank. Injectors are probably pretty dirty. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 3, 2016 Author Share Posted October 3, 2016 earlier today i bought some heet at walmart, red bottle, does water removal from gas and cleans fuel injectors, the bottle said. guess i can run a bottle of seafoam in my next tank of gas. thanks again. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 just swapped out cps and took for test drive, car started stumbling about 3 mins into ride, luckily i was only taking a small loop near work. i have battery disconnected, will do so for 30 mins, and then test drive again. i have a mps coming but may try tps swap cause i have a spare. http://www.914world.com/bbs2/uploads/post-2460-1475612082.jpg Link to comment Share on other sites More sharing options...
GTEASER Posted October 4, 2016 Share Posted October 4, 2016 Clean your IACV. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 do you condone this method? found here: http://www.ultimatesubaru.org/forum/topic/118540-idle-air-control-valve-cleaning-problem/ Posted 05 May 2011 - 11:09 PM If you do wish to clean the IAC, this is the procedure from the FSM 1. Start and warm up engine until radiator fan operates 2. Hold throttle open so engine runs at 2,000 RPM 3. Disconnect bypass hose from IAC 4. Slowly pour one 16 oz can of cleaner (Sea Foam is good) into bypass air hole 5. Leave the engine to run for 5 minutes When you do this expect lots of white smoke from the exhaust. When you're done don't forget to re-attach the bypass hose to the IAC. Like This Quote MultiQuote Link to comment Share on other sites More sharing options...
GTEASER Posted October 4, 2016 Share Posted October 4, 2016 If your car is NA, I would take it off and clean it with SeaFoam or carb cleaner and tooth brush or other implements to scrub it off the best you can to get the build-up out. There are how-to's for cleaning Subaru IACV's on Youtube. The method above is best for periodical maintenance. GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 thanks! i am off to youtube land right now. Link to comment Share on other sites More sharing options...
RumbleRumble Posted October 4, 2016 Share Posted October 4, 2016 You can also do it from the brake booster line. It will go through the intake and into everything. A whole can is a bit much I'd do 4-8oz at a time. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 glad you commented, i'd so much rather do it this way : ) i'll keep you guys posted. so pour it slowly into this hose?? seems not right as this would bypass iacv?? and keep engine rpm around 2000-2500 ?? http://www.914world.com/bbs2/uploads/post-2460-1475616566.jpg Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 seems like a capped tee in this fat iacv line would be great for regular seafoam applications?? http://www.914world.com/bbs2/uploads/post-2460-1475616992.jpg Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 note that this iacv hose is stiff as hell. might be better to cut is off and replace with new, in an effort to avoid breaking the plastic nipple on the intake tube. thoughts ?? Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 ok, iacv hose was not as hard as i thought, and i was able to get it off intake tube with not much effort : ) i poured a bottle of seafoam thru it with engine rpm around 3000. i have car running now and will test drive it in a bit. instead of washers, i used a folded zip tie to raise my idle. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 oh yeah, forgot to mention, i pulled out new fuel filter and gas was nice and clean. old was doing its job nicely, probably for years. i was concerned tank was rusty but don't think it is : ) http://www.914world.com/bbs2/uploads/post-2460-1475620917.jpg Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 well, just tested drove it, and problem seems them same. driving with easy peddle seems to help. after more aggressive peddle, symtoms seem to worsen, stalling while driving, feathering peddle a bunch of times to keep it running and to get back to running smoothly. when i am driving at it goes bad, my green power light comes on and stays on until things smooth out. anyone think it could be a bad TPS, as my non suby coworker seems to think it might be. that said, maybe i do need to do a thorough iacv cleaning as suggested above. thanks jim Link to comment Share on other sites More sharing options...
GTEASER Posted October 4, 2016 Share Posted October 4, 2016 Have you checked for saved codes that may not have popped the CEL? GTEASER's 2012 Legacy GT - Sold GTEASER's 2009 XTeaser - Sold GTEASER's 1992 Legacy SS - Sold Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 4, 2016 Author Share Posted October 4, 2016 my car for some reason only has one green plug but has both black plugs, under dash, so i have not checked codes cause i was under the impression that i needed both green plugs? a few things, we pulled the vacuum line from fuel regulator and vacuum seemed very low and car did not react, at idle. tomorrow i will put a fuel pressure guage to see if i have 36 psi coming from the fuel pump. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 5, 2016 Author Share Posted October 5, 2016 well, i can't take it back yet, that the seafoam procedure did not fix my problem, but last night when my buddies were criticizing me using you guys to diagnose my car's problem, and they came out to me car and pulled a few vacuum hoses and expressed concern about my fuel pressure, among another things, we then took a short test drive together and the car barely acted up. today i drove to the gas station and a bit more, maybe 3 miles total, and no acting up. i have a 3 hrs drive on friday, that will be the real test. one thing that my car developed shortly after i got it was torgue bind and i replaced the solenoid and some of the fluid, but now in reverse it seems to be coming back. i will drain fluid and replace, though i know doing this at the drain plug only lets one replace only about 30% of the fluid this way. thoughts about recurring torgue bind. Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 5, 2016 Author Share Posted October 5, 2016 turns out i was all worried about only having one green plug, but it turns out, that the plugs i need are the black ones and i have both of these. so today i will CHECKED SAVED CODES : ) http://www.surrealmirage.com/subaru/engine.html Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 5, 2016 Author Share Posted October 5, 2016 guys, i connected my 2 black diagnostic plugs and got a code, drum roll please, 23. which is mass air flow sensor, which i bought on ebay and it arrived today, what a coincidinky : ) guess i will sway out my current maf for the one i rcvd today. see video. https://www.youtube.com/watch?v=KPWEQSuU6_I Link to comment Share on other sites More sharing options...
jimkelly1964 Posted October 5, 2016 Author Share Posted October 5, 2016 i swapped out the maf for the one i rcvd from ebay today, but car ran worse and CEL came on and stayed on. i rechecked black plugs connected and still got code 23. i swapped the ebay maf back to my original one cause my car ran better with it. with ebay maf car would surge till it settle at an idle rpm but when i tried to give it gas it would rev up hesitantly but then engine would die. i also drained about 3 quarts of dex/merc trans fluid from my trans and put one gallon in BUT it seems i am still low. either i never put enough in or the trans is burning some? binding is obvious but i hope it is just due to being a qt or 2 qt low. buddy is bringing me some more tomorow. hope nothing is permanently messed up in my trans. thanks guys for listening : ) Link to comment Share on other sites More sharing options...
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