Welcome to Ultimate Subaru Message Board, my lurker friend!
|Welcome to Ultimate Subaru Message Board, an unparalleled Subaru community full of the greatest Subaru gurus and modders on the planet! We offer technical information and discussion about all things Subaru, the best and most popular all wheel drive vehicles ever created.
We offer all this information for free to everyone, even lurkers like you! All we ask in return is that you sign up and give back some of what you get out - without our awesome registered users none of this would be possible! Plus, you get way more great stuff as a member! Lurk to lose, participate to WIN*!
* The joy of participation and being generally awesome constitutes winning
** Not an actual guarantee, but seriously, you probably won't regret it!
Serving the Subaru Community since May 18th, 1998!
Brat keeps stalling after adding motor oil
Posted 29 September 2008 - 05:56 PM
My 87 Brat had been running fine. Just passed CA smog check about two months ago. I checked my oil two weeks ago and it wasn't even registering on the stick. It took almost two quarts of oil to bring it back up to half way between low and full. Next day, I drove the car and it stalled out about 6 or 8 times over 15 minutes of stop and go. This type of thing lasted another 2-3 days. I thought maybe I put in too much oil, despite the fact that it wasn't even reading full (and yes, the dipstick was in all the way). So I drained out a quart of oil. No change. I increased the idle to 1500RPM to help things out, but it was still stalling occasionally. When it does stall, it is always when putting in the clutch to brake (and often when cornering). It had always started back up... until this morning.
Today, it stalled out 4 or 5 times and restarted. Next stall it wouldn't restart. Luckily I rolled off the road in a safe place. As I cranked and cranked, the check engine light would flash. Occasionally, it would stop flashing briefly and the engine would start to fire up, only to crap out and not really turn over. I called the wife and a friend who came to help. Just as my friend was driving up. I cranked it one more time and it started right up. I increased the idle to 2000RPM and it drove the rest of the day with no stalls.
So now, I ask you knowledgable fellows: did I screw something up by adding oil? How do I trouble shoot this problem. I am wasting precious fuel at 2000RPM idle, plus I don't want to get stranded again. Thanks for any input.
Posted 29 September 2008 - 06:31 PM
You might have knocked a vac line loose if its stalling at idle.
Posted 29 September 2008 - 06:44 PM
Posted 29 September 2008 - 07:18 PM
Your problems are almost certainly unrelated to the oil except possibly as noted you may have inadvertantly pulled a vacuum line loose.
Spray around with carb cleaner to check for vacuum leaks. If the engine pitch changes investigate the area you were spraying for broken/cracked/disconnected lines.
Posted 29 September 2008 - 08:08 PM
Also in favor of the carb cleaner leak diagnosis.
Posted 29 September 2008 - 08:17 PM
The ej swap also solved this problem!
Posted 30 September 2008 - 09:36 AM
I will do the carb cleaner test. I did not see any obvious vac hoses popped off, but I'll double check and report back my findings if I can't get it fixed. Thanks for all the input so far!
Posted 30 September 2008 - 10:53 PM
Actually it is possible that changing the motor oil could be the cause of the poor idle. It is very rare this happens but it does, although I've never seen it on a Subaru so far. In some cases where the carb is in very poor shape or the float level is wrong gas can end up in the oil pan. Setting the carb idle adjustment while the gas is in the oil makes a difference because the gas fumes from the crankcase are being sucked into the carb and can cause a faster idle which is then compensated for by turning the idle down on the carb. As soon as new oil is put in the motor the extra fumes are gone and the idle drops. Like I said, rare but it does happen. Barry
Posted 30 September 2008 - 11:09 PM
Posted 01 October 2008 - 04:34 AM
Posted 01 October 2008 - 12:46 PM
Posted 01 October 2008 - 01:43 PM
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users