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!
Cold Starting Problems
Posted 13 December 2003 - 04:30 PM
First of all, I live in the Phoenix area, so this doesn't happen very often, but for the third time this year I couldn't start my car this morning.
Seems that whenever it is cold enough for frost to form on my car, it won't start. It will crank, and usually fire and run for about 1 second, then quit. After that, it will just crank and crank. I have spark, but no signs of flooding (i.e. wet plugs and/or gas smell from the tailpipe.
I'm thinking maybe water in the fuel system is freezing. Last time this happened I installed a new fuel filter. Today I bought some STP fuel system water eliminator and anti-freeze, which I will put in when I get home.
I was wondering if any of you in the colder areas of the country had any other suggestions to help me diagnose this?
Posted 13 December 2003 - 04:48 PM
But I'm runnin a carb on my 86 so I'm not sure what it equates to in fuel injection. Your choke also sounds like its not functioning.
I have to spend 5 minutes revving my engine every morning when I start it..
Also what kind of plugs are you running? If they aren't NGK plugs, change em to NGks.
Posted 13 December 2003 - 05:53 PM
Posted 14 December 2003 - 12:02 AM
Check the connections and then test the unit
It is screwed into the upper rad hose connection and has a wired pig tail (other coolant sensor there is for the dash gauge).
Do a search for coolant sensor - read all about it
Hope this helps
Posted 14 December 2003 - 01:28 AM
Posted 14 December 2003 - 09:33 AM
Posted 14 December 2003 - 10:01 AM
Posted 14 December 2003 - 10:25 AM
It is controled by a timer in the ECU, this short run period re-presurizes the fuel system.
It also should run when the ig sw. is in the crank to start position and then once the car has fired.
Now if you get niether of these "run periods" I would look to the FPR (fuel pump relay) or it's control circuit.
Note: the FPR is in a closed (providing the positive side of the fuel pump operation) any time the ig switch is in the run position, the ECU then provides the negative side to the pump. So you can test the relay simply by checking for + voltage at the pump harness.
If you have no positive voltage the relay is located above and to the drivers side of the steering col. You must remove the trim panel to see them. There will be several realys in a row, they are all the same so you could swap one to see if it cures the problem.
Hope this helps
Here is what a relay looks like
Posted 14 December 2003 - 10:52 AM
If I undersatnd you correctly, I'm going to need to pull the panel from underneath the steering column same on the covers the ECU?
Thanks again! This board is the best!
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users