rough start continues......
 

replaced the cyl #1 fuel injector (and fuel filter while i was at it) and the rough start issue continues..... :mad:

so far, all spark plugs, coil pack #1, and temp sensor were replaced.

what should i waste my money on next, MAF sensor? AAAAAARGH!

Problem goes away after running for a while?

Leaky injector?

i would get cylinder #1 misfire codes if cold start, and no warm up at all.

i just replaced the #1 injector, no change.


only other thing i can think of, is MAF, an ignitor issue, or the wiring from the coil connector to the ignitor? AAAARRRRRGH!

everything is fine once car warms up after a few minutes. :confused:

Crank/cam sensor?

Alan I would check all the inlet manifold bolts. The injector stacks to the head, and the manifold to injector stack, bolts. May have a leak when its cold.

Harvey. ;)

I told someone else on this forum after my smog test about the the OBDII monitors resetting every time you cycle the ignition he said I would have failed the smog test.

Some text ripped from endwrench

Early glitches

True early OBD II systems had some problems. For example, the '95 and '96 Legacy, Impreza and SVX versions may exhibit a "not ready" condition during a state I/M program inspection because they reset their readiness code at each engine shut-down.

To boil it down to essentials, it will illuminate the MIL(malfunction indicator lamp) if a system or component fails or deteriorates to the point where emissions could rise to one and one-half times the Federal Test Procedure standards.

From an emissions standpoint, a misfire is about the most dangerous malfunction blah, blah blah i'm tired of typing.

If you don't bother to use the misfire monitor, your SOL! This is a favorite feature of OBD II you can look at misfire counts by cylinder. etc, etc, etc.

Alan, I would say if your getting no CEL, MIL leave it alone. If it's tripping a code, TITTD< acronym

Victor

I hope that fixes it. Just so I can see the angry post by Alan after all the money he has thrown at it :p :D

<Butthead> shut up, fart-knocker!</Butthead> :mad:



thanks for the tip, Harvey. i'll try it. :)

I agree with Harvey and add that you might want to check the IAC, as it only functions at idle (cold only?)
I haven't heard of the MAF being a problem only when the engine is cold.
-Bill

I have the exact same problem. The only difference is I get Cylinder #5 misfire. It's not an OBDII bug. The car definitely runs rough and misses for about 20 to 30 seconds. The CEL light flashes then latches on.

The problem always occurs at the same time. About 3 to 5 minutes after start up with the temperature gauge just starting to move above the C. LIke Landshark I have to go up a long hill leaving work.

Once the car is warm there is never, and I mean never a problem.

What sensor or operating conditions are becomong active about that time?

i removed it and cleaned it, along with the throttlebody. others have said a defective IAC would not cause a misfire. i dunno. :confused:

aux air valve - Harvey has mentioned it is under the left side of the intake. anyone know the procedure for removing/replacing it? does the entire intake need to be removed? <shudder> :(

The only issues with the SVX 96-97 OBDII monitors are they reset after each cycle. It has no affect on the ecu ability to properly store the fault code. Landshark has a 97 SVX which is OBDII and if he is getting a CEL/MIL it will help point the way to the problem. It will surely make it easier for a tech to track down the problem with a subaru select monitor. You can either keep guessing and replacing parts that don't need to be replaced and tell yourself if it doesn't fix the problem it's good preventive maintence. Or bite the bullet and TITTD.

Subaru Select Monitor?
 

Is that different than the code scanner that Advance Auto will loan you?

I borrow their scanner and read the codes. The only code set it Misfire Cylinder #5.

My car is a '97 also with a randomly set CEL.

The car definitely runs rough for a brief period of time the code is valid. But what is causing the code? Something changes in the operating conditions as the coolant gauge moves just above the C mark.

I thought plugged EGR ports might have merit. A slow responding auxiliary air valve or might also lean things out.

Autozone, advance, kragen, etc have generic OBDII code readers. The subaru select monitor II is what they are currently using. SSMIII I hear is coming out real soon. I would say take it to the dealer they can let it sit overnight for a cold start.