emergency!! need help now!!

cruisen_15 · #1 10-14-2007, 09:26 PM

ok, i changed 4 out of 6 plugs with some alright ngk R, and the other 2 are some bosch platinum plus 2, after i did that the engine was bogging down and when i accelrate the it sounds like a 4 cyl. and back fires, whats wrong??!! no check engine light, this was happening before i changed the plugs but its the same symptoms but twice as bad!!

Turbone · #2 10-14-2007, 09:28 PM

Check all the plug wires, from the coil pack connectors to the valve covers.
Sounds like ther might be a bad one in there.

cruisen_15 · #3 10-14-2007, 09:42 PM

they are all connected, but at idle it wants to die but then it revs up a little so it doesnt, and my lighting all dims....

94SubieSVX · #4 10-14-2007, 09:45 PM

Kinda sounds like your timing belt might have jumped a tooth or two

It's Just Eric · #5 10-14-2007, 09:59 PM

I dont know if this is necicarry...But it just seems to me that all 6 plugs should probably be the same..?

If such isnt the case, perhaps you issue is fuel related and not spark related? could something as simple as a clogged fuel filter cause bogging?

Just complete gueses by me, but probably worth looking into

Trevor · #6 10-14-2007, 10:05 PM

You say that the car backfires. This would indicate that you may have the plug wires mixed up and on the wrong plugs.

cruisen_15 · #7 10-14-2007, 10:50 PM

ok well atleast knowing my old plugs would atleast allow my car to run better but still bog, i put the old ones back and it went back to before i put the other ones on, but because i did this and it made my usual symptoms just twice as bad, maby its my plugs i have on right now, maby i should go buy 6 brand new ones, any one else following what im thinking??

Turbone · #8 10-14-2007, 10:53 PM

I just reread your 1st post and your saying you put used plugs in?
If thats the case, you really need to put new ones in.

cruisen_15 · #9 10-14-2007, 10:56 PM

well the 4 ngk plugs i put in were used for a short amount of time, maby 2-3 months, they were gapped plugs and the bosh plugs were gapless, is that bad to mismatch?

Turbone · #10 10-14-2007, 11:08 PM

I think so.

Yeah, I'm pretty sure about that

Trevor · #11 10-15-2007, 12:09 AM

Quote:

Originally Posted by cruisen_15

ok well atleast knowing my old plugs would atleast allow my car to run better but still bog, i put the old ones back and it went back to before i put the other ones on, but because i did this and it made my usual symptoms just twice as bad, maby its my plugs i have on right now, maby i should go buy 6 brand new ones, any one else following what im thinking??

Refer my previous post. Does the car still backfire?

nextse7en · #12 10-15-2007, 12:21 AM

As far as a backfire, I would have to agree with Trevor, at least one of your coils is firing inappropriately, I cannot see how spark plugs would cause a backfire.

My supposition is thus. You have at least two issues occurring here one is a misfire. This could be as simple as two coils having switched locations. The fact that the problem was lessened to some extent when you went back to the old spark plugs is puzzling, and I have a feeling we don't know the entirety of the situation.

The car feeling bogged down could also be caused my two coils being switched, as could the feeling that the car is running on four cylinders. The real mystery here is what is the long term issue you are trying to rectify? Two coils being switched around would render the car nearly un-drivable - but it sounds like you have been grappling with this issue for a while.

Take a deep breath, and explain each issue to us clearly, we have a much better chance of solving your problem. Break it down for us.

1. What was the original problem you were having?

2. You said the car was backfiring after you changed the plugs, is it still doing that?

3. What is the car doing right now.

4. Have you checked to make sure your coils are on in the correct sequence?

Worn plugs will cause some driveability issues, but nothing as severe as you are describing, thats why I'm trying to get deeper. Mismatched plugs are not ideal, but will not cause the car to behave in the way you have described.

-Patrick

Psychosis5150 · #13 10-15-2007, 01:03 AM

Did you unplug your MAF to get at the passenger side plugs and forget to plug it back in? "Edit" Never mind, you said no CEL.. DOH!

cruisen_15 · #14 10-15-2007, 12:30 PM

1. the car has very rough idle, as if its going to die but i go ahead and give it some gas so it doesnt.

2. if i give to much throttle it will bog down, not allowing my to reach higher rpms without flooring it.

3. the owner i baught the svx from said "it might need new spark plugs, thats why it hessitates like it does".

4. i have replaced fuel filter and it made no change

5. i have tryed a good MAF and no change

6. i changed the plugs to the ones before the 4 ngk i put in , this atleast allowed me to drive it.

i will try to make a video of my symptoms but i just cant seem to get the camera to work right. thanks to all of you who are helping me out

Mr.EG33 · #15 10-15-2007, 12:39 PM

Check the crankshaft reluctor wheel and crankshaft sensors, mine had a similar problem but only 2 cylinders were firiing correctly with backfiring... My reluctor wheel was throwing off everything (spark and fuel) it had 1 broken tooth - fixed it and now it runs great!!!!

Location is behind the crankshaft pully take it off and check to make sure there is no broken teeth or bent teeth... Maybe a crankshaft sensor??

http://www.subaru-svx.net/forum/showthread.php?t=41157