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My poor Sube wont start!!
Posted 04 December 2003 - 07:23 PM
Wow, cool forum... been awhile since I've been around <no net access> It sure was a surprise to be redirected here!
Anywho, my Wagon's got a very annoying problem...
In short, i guess since the weather is cold, she wont start. :cornfuzz:
She's an SPFI.
Here's what I've done so far:
New cap, rotor, plugs, wires. The contacts between the rotor and cap are clean. Two different coils, one original, one accel super stock. Two different coil modules, one original, one from a running Sube. Tested for spark at each plug. Compression is good all around. Fuel pressure good, fuel pump operating, injector is pulsing, fuel in the tank, lines are not frozen <not cold enought yet for that anyway> Distributor rotor is turning, timing belts are not "off" and are not broken. The check engine light is not on. The vehicle has sat since this morning when it started then stalled, and i used a little quick start, the plugs are clean, so i rule out flooding....:cornfuzz:
She was running great yesterday... what in the world happened?
Any thoughts or input GREATLY appreciated....
Posted 05 December 2003 - 10:37 AM
Sounds like the FI coolant thermosensor is knackered.
On the goose neck (upper rad hose fitting) there are two coolant sensors, one for the dash gauge and one for the FI system.
The one you are concerned with has a wired "pigtail" the other is a straight spade connection.
You could try cleaning it's connector, but testing it is better.
I have a chart of the resistance values from an 89 FSM.
Email me if you need them.
Hope this helps
Posted 05 December 2003 - 01:32 PM
Okay... on the advice of a Subaru techie, I changed the coolant thermosensor <BRAND new OEM $90!!> , BUT it seems to be in a different location than the one you described....
The one i changed, was right near the throttlebody, and yup it had a wired pigtail...it just looks like a threaded hunk o' brass, like a bolt with wires on the head of it.
Unfortunately, this did not cure the problem.
Did I change the wrong one? I was assured that this one was "not for the guage, but for the computer".:cornfuzz:
BTW, you guys rock! Thanks for the help!
Posted 05 December 2003 - 01:50 PM
Posted 05 December 2003 - 03:07 PM
All the stuff listed, I did literally one item at a time. 'specially with plug wires, I never rip everything apart at once, cos then putting back together, anything can happen...
At any rate, a local mechanic recommended changing the coil, as he mentioned a yellow spark isnt the most healthy. Funny thing is, the coil that was in there is an Accel super stock thats only got 20,000 kms on it<i put that on new>... and the coil(s) i put in seem to give the same spark strength visually.. !?
Guys, i really appreciate your help, and your patience...this has been confounding me. I am by no means an "expert" mechanic, but I've looked at everything I know how to and then some.
I'm very frustrated. My Sube's never given me trouble like this.
I don't have auto seatbelts, so that relay thing isn't an issue...I read that in an archived post somewhere.
The fuel flow is strong as I crank, I've actually pulled the fuel line after the filter and the damn thing sprayed halfway across my driveway (instead of into the bucket )
I'm gonna give another check on the plugs and wires, just to be sure.
Posted 06 December 2003 - 09:09 AM
This devise is located on the coil bracket under the coil. It relys on the bracket being grounded as it is only a power transistor.
They do not go bad very often so a boneyard coil bracket will fix it,if it is indeed the problem.
Posted 06 December 2003 - 11:40 PM
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