bmx045 Posted March 20, 2012 Share Posted March 20, 2012 So after the new shortblock installation I find myself with cyl 1 and 3 (pass side cylinders) misfires only when in the touchless carwash(the fast jet spray thingies). It will stumble and misfire for about 5 seconds then completely disappear. I have no other times when I misfire. Another local subaru owner has an identical problem and doesn't know what it is. I got a bottle of water and dribble drabbled some water in the areas I think are being affected while the engine was running, with the hood up, but found no reoccurence of aforemetnioned issue. Any common areas in the engine bay that this happens in? My fuel trims are fine, vac is fine, no vac leaks found. Air box is sealed fine, coil pack connectors are on (obviously as it runs and drive fine otherwise). Link to comment Share on other sites More sharing options...
Max Capacity Posted March 20, 2012 Share Posted March 20, 2012 You lazy bum. Wash the damn car by hand. Oh let me guess, you live in an appartment. Hey use the wand at the car wash and bring your own towels to dry it off. I would think it could be a humidity problem and a not water tight connection. Maybe take apart all the connetors, check the seals. Good Luck 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...
bmx045 Posted March 20, 2012 Author Share Posted March 20, 2012 I dribbled water over the maf and connectors and coil packs in hopes to fry my ecu, didn't stumble. It's weird that the misfires resolve within seconds! Link to comment Share on other sites More sharing options...
Turkeylord Posted March 20, 2012 Share Posted March 20, 2012 Soap in the intercooler Link to comment Share on other sites More sharing options...
bmx045 Posted March 20, 2012 Author Share Posted March 20, 2012 I did see some suds, possible culprit duly noted. Link to comment Share on other sites More sharing options...
Max Capacity Posted March 20, 2012 Share Posted March 20, 2012 I dribbled water over the maf and connectors and coil packs in hopes to fry my ecu, didn't stumble. It's weird that the misfires resolve within seconds! That's close but it's not the same as the hood closed, engine running, high pressure hot water being forced under the car, water vapor rising up. I guess that's the engineer in me (not that I am one) talking. Next time it rains make sure you drive the car while it's raining. My old 86 Ford F150 doesn't like rainy day's sometimes too. That's how I know it's time for a new distrubitor cap and rotor. 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...
Mega Users paintpollz Posted March 20, 2012 Mega Users Share Posted March 20, 2012 my last truck misfired too after i sucked a gallon of water through the intake. hmmmm "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
bmx045 Posted March 20, 2012 Author Share Posted March 20, 2012 Hmm, didn't think about the steam factor.... I also no longer have the underneath heatshields on my header. weird. neither does my friend...but he does have an undertray on. Link to comment Share on other sites More sharing options...
bmx045 Posted March 20, 2012 Author Share Posted March 20, 2012 but at the same time people with aftermarket headers don't have heatshields on them and dont have this issue. maybe i should put some dielectric grease in the coilpack connectors...the steam may be seaping through Link to comment Share on other sites More sharing options...
Moderators BarManBean Posted March 20, 2012 Moderators Share Posted March 20, 2012 Why still no undertray?...TMIC + undertray = good. "Bullet-proof" your OEM TMIC! <<Buy your kit here>> Not currently in stock Link to comment Share on other sites More sharing options...
bmx045 Posted March 20, 2012 Author Share Posted March 20, 2012 I've had bigger things to deal with, like dropping an engine in and out. I'm just past break in and monitoring for leaks, still none. Maybe this weekend i'll get to put it on. Link to comment Share on other sites More sharing options...
Leviman Posted March 23, 2012 Share Posted March 23, 2012 Where's your intake? If it's a factory snorkel I'd think the carwash is just blasting up the intake causing it to suck a bit of water. Link to comment Share on other sites More sharing options...
bmx045 Posted March 23, 2012 Author Share Posted March 23, 2012 factory intake setup, i briefly though about the steam being sucked in or whatever, not sure. can steam get past the filter? Link to comment Share on other sites More sharing options...
Lardo420 Posted March 23, 2012 Share Posted March 23, 2012 Soap in the intercooler this Link to comment Share on other sites More sharing options...
Mega Users paintpollz Posted March 23, 2012 Mega Users Share Posted March 23, 2012 factory intake setup, i briefly though about the steam being sucked in or whatever, not sure. can steam get past the filter? I don't even have trouble with my open cone avo "Remember Danny - Two wrongs don't make a right but three rights make a left." Link to comment Share on other sites More sharing options...
Turkeylord Posted March 23, 2012 Share Posted March 23, 2012 Hair dryer. Link to comment Share on other sites More sharing options...
bmx045 Posted March 23, 2012 Author Share Posted March 23, 2012 noooooop Link to comment Share on other sites More sharing options...
rweezy Posted March 24, 2012 Share Posted March 24, 2012 I have had this issue as well. Especially when the under carriage sprayer is on. Goes away after no more then 10-20 seconds and I have no under tray either so maybe it is the steam doing something. Link to comment Share on other sites More sharing options...
Firepuma Posted March 24, 2012 Share Posted March 24, 2012 DunnO if Bmx is referring to me as the friend but I've had the same issue hand washing my car (fmic) cel for a second then goes away. Rough start. Never pulled the code because it vanished so fast. I also have kn intake- Link to comment Share on other sites More sharing options...
bmx045 Posted March 24, 2012 Author Share Posted March 24, 2012 Yup. YOUUUUU Link to comment Share on other sites More sharing options...
Cyclozene Posted March 24, 2012 Share Posted March 24, 2012 Possibly the humidity of the air? But I would think all cylinders would misfire not just 1 and 3. —Pirated Tapatalk app Link to comment Share on other sites More sharing options...
bmx045 Posted March 24, 2012 Author Share Posted March 24, 2012 Yeah. Odd. Im gunna snug the coil pack connectors up and check the main engine harness connector. I took a water bottle and dropped water on certain areas and couldnt replicate the misfires. I think the steam is getting into something. Link to comment Share on other sites More sharing options...
Lardo420 Posted March 24, 2012 Share Posted March 24, 2012 Its probably your plastic intake manifold. U should do an sti swap Link to comment Share on other sites More sharing options...
lee07 Posted March 24, 2012 Share Posted March 24, 2012 U'r car hates u for taking it automatic car washes so it misfires. How many girlfriends u have. U Always change u'r avatar. Link to comment Share on other sites More sharing options...
frank_ster Posted March 24, 2012 Share Posted March 24, 2012 i had issues also when in carwash or deep puddles, i figured it was water getting on the front o2 sensor, and or bad coil packs with cracks that end up being senstive to water. but don't have these issues with the buick engine Now that's thinking out of the boxer! fyi all 05 + legacy's have built in code reader Link to comment Share on other sites More sharing options...
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