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> My 2.0 runs on 2 cylinders (1 and 3 only), Help a brother out!
Gint
post Nov 4 2005, 05:43 PM
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Dammit! It runs great on 2 cylinders!!! Except for the occasional backfire. 1 and 3 fire, 2 and 4 do not.

I dunno. I pulled all of the injectors and fuel lines in the engine bay. They're all clear. I have 29 pounds of fuel pressure. I tested all of the injectors while cranking the engine over. All squirt fuel in a nice conical pattern and the volume appears to be the same. I have spark on all cylinders. But only 1 and 3 fire. If I pull the injector connector or the plug wire off of cylinders 2 or 4, nothing changes. They are both not doing anything. If I pull either the injector connector or the plug wire from cylinders 1 or 3, the engine dies; apparently it can't run on just one cylinder, go figure.

I'm wide open to suggestions. I need a 914 fix before the weather turns to crap.

(IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif)

Update!
If you read all of this thread, you'll see that bondo spotted my error. I swapped wires on the dizzy for cylinders 2 and 4 and she fired right up on all four cylinders.
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TINCAN914
post Nov 4 2005, 05:47 PM
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Ok I got the fix...
Get a pen and paper, write this down, or print it out if you like.

Box it up it's no good send it to me, I in return will send you mine. Hell I will even include the jack stands... Sorry Man, couldn't resist.. Wish I could help.... Good luck...
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SLITS
post Nov 4 2005, 06:04 PM
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Gint...valves on 2 & 4 too tight (1st guess).... that was the problem with Toast's car on one cylinder.. pull plug wire or injector connector no change in engine. Once I adjusted the valves (and purposely 0.001" looser), the engine no longer had a misfire.

So sayeth Ssssssslits
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Gint
post Nov 4 2005, 06:17 PM
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QUOTE (SLITS @ Nov 4 2005, 05:04 PM)
Gint...valves on 2 & 4 too tight (1st guess).... that was the problem with Toast's car on one cylinder.. pull plug wire or injector connector no change in engine. Once I adjusted the valves (and purposely 0.001" looser), the engine no longer had a misfire.

So sayeth Ssssssslits

I can check it, but I just did an adjustment less than a hundred miles ago. New plugs/cap/rotor/condensor/fuel and air filters with only a couple hundred miles that all worked great before the fuel pump quit last month. The only thing I haven't done is installed my new plug wires or swapped out plugs. I verified spark at the plug end of the wires though, and as I said, the plugs only have a couple hundred miles on them.
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onrails
post Nov 4 2005, 06:21 PM
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f.i. trigger points? they fire two at a time. mabe intermitentif fluid soaked.

only other guess is a valve adjustment.





my cent & a-half
Brian
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Brian_Boss
post Nov 4 2005, 06:22 PM
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I would pull the spark plugs on the non firing cylinders and see if they are wet with fuel. It would also be interesting to swap the injector plugs (1 & 2) and (3 & 4) and see if the dead cylinder follows the injector connection or stays the same.

If spark plugs are wet with fuel and/or the miss doesn't change with the injector plug, I would think ignition and check the dead cylinders w/ a timing light.

I know you're pretty knowledgeable so don't be insulted if this sounds too basic.

Edit: I see you checked spark - was that with the plugs out or by using timing light or similar means to check for spark under compression?
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bondo
post Nov 4 2005, 06:27 PM
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Is there any chance the plug wires got swapped between when it last ran and now? Easy thing to check.
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Gint
post Nov 4 2005, 06:27 PM
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QUOTE (Brian_Boss @ Nov 4 2005, 05:22 PM)
I would pull the spark plugs on the non firing cylinders and see if they are wet with fuel. It would also be interesting to swap the injector plugs (1 & 2) and (3 & 4) and see if the dead cylinder follows the injector connection or stays the same.

If spark plugs are wet with fuel and/or the miss doesn't change with the injector plug, I would think ignition and check the dead cylinders w/ a timing light.

I know you're pretty knowledgeable so don't be insulted if this sounds too basic.

Edit: I see you checked spark - was that with the plugs out or by using timing light or similar means to check for spark under compression?

I did that already (injector connector swap). No change. That's what prompted me to pull the injectors. Like I said, checked the pattern and verified that they are all functional. I put new injector seals in while I was there. Verified spark at the spark plug ends of all of the plug wires.
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Gint
post Nov 4 2005, 06:29 PM
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QUOTE (bondo @ Nov 4 2005, 05:27 PM)
Is there any chance the plug wires got swapped between when it last ran and now? Easy thing to check.

The plug wires were completely off the cap. I pulled the dizzy and took it apart to clean it all out. It's in excellent condition as are the trigger points. I verified the firing order and plug wire locations several times. 1-4-3-2 counter clockwise on the cap, left bank 1 and 2 from the rear, right bank 3 and 4 from the rear. I have it memorized.
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Gint
post Nov 4 2005, 06:32 PM
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QUOTE (Brian_Boss @ Nov 4 2005, 05:22 PM)
Edit: I see you checked spark - was that with the plugs out or by using timing light or similar means to check for spark under compression?

Pulled the wires at the plug end and checked them for spark against ground. And ofcourse with me as the ground (I hate doing that). (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
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SLITS
post Nov 4 2005, 06:36 PM
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You got me....you said you have fuel to the injectors (so it's not a harness electrical or trigger point problem) and you have spark (not electrical).....and it backfires occasionaly...what's left?

closed gap on the plugs

to open a gap on the plugs

brigded gap on the plugs

dead plugs

crossed wires

valves
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Gint
post Nov 4 2005, 06:37 PM
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I'm off with the fam to the Nuggets game. Keep those suggestions coming gang! I'm going through and verifying a thought process if nothing else.
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Gint
post Nov 4 2005, 06:38 PM
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QUOTE (SLITS @ Nov 4 2005, 05:36 PM)
You got me....you said you have fuel to the injectors (so it's not a harness electrical or trigger point problem) and you have spark (not electrical).....and it backfires occasionaly...what's left?

closed gap on the plugs

to open a gap on the plugs

brigded gap on the plugs

dead plugs

crossed wires

valves

My thoughts too (except for the crossed wires - verified that already). I'll go after a plug swap and valve adjustment check tomorrow.
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bondo
post Nov 4 2005, 06:56 PM
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QUOTE (Gint @ Nov 4 2005, 05:29 PM)
QUOTE (bondo @ Nov 4 2005, 05:27 PM)
Is there any chance the plug wires got swapped between when it last ran and now? Easy thing to check.

The plug wires were completely off the cap. I pulled the dizzy and took it apart to clean it all out. It's in excellent condition as are the trigger points. I verified the firing order and plug wire locations several times. 1-4-3-2 counter clockwise on the cap, left bank 1 and 2 from the rear, right bank 3 and 4 from the rear. I have it memorized.

Umm... my engine has it 1-4-3-2 CLOCKWISE on the cap, looking from the top of the cap. methinks this is a clue to your problem.. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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Aaron Cox
post Nov 4 2005, 07:03 PM
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QUOTE (bondo @ Nov 4 2005, 05:56 PM)
QUOTE (Gint @ Nov 4 2005, 05:29 PM)
QUOTE (bondo @ Nov 4 2005, 05:27 PM)
Is there any chance the plug wires got swapped between when it last ran and now? Easy thing to check.

The plug wires were completely off the cap. I pulled the dizzy and took it apart to clean it all out. It's in excellent condition as are the trigger points. I verified the firing order and plug wire locations several times. 1-4-3-2 counter clockwise on the cap, left bank 1 and 2 from the rear, right bank 3 and 4 from the rear. I have it memorized.

Umm... my engine has it 1-4-3-2 CLOCKWISE on the cap, looking from the top of the cap. methinks this is a clue to your problem.. (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

been there done that!!! LOL

1 4 3 2 and only one and 3 fire. swap plugs on 2 and 4 (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)
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TheCabinetmaker
post Nov 4 2005, 07:43 PM
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If you aren't dislexic(sp) about the 1432 ccw thing, then Bondo and Aaron are correct. Otherwise I would look at valve adjusement.

Good luck
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SLITS
post Nov 4 2005, 08:20 PM
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QUOTE (vsg914 @ Nov 4 2005, 06:43 PM)
If you aren't dislexic(sp) about the 1432 ccw thing, then Bondo and Aaron are correct. Otherwise I would look at valve adjusement.

Good luck

BINGO!

Distributor rotation (and firing order) is CLOCKWISE.........
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SGB
post Nov 4 2005, 08:32 PM
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yep. I done that too,


(IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)
but I knew better than to tell about it.
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Aaron Cox
post Nov 4 2005, 08:34 PM
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QUOTE (SGB @ Nov 4 2005, 07:32 PM)
yep. I done that too,


(IMG:http://www.914world.com/bbs2/html/emoticons/unsure.gif)
but I knew better than to tell about it.

happens to the best of us..... (like ED and slits....)
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boxstr
post Nov 4 2005, 11:20 PM
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Mike Doe's this car have the injector resistor pack?? If yes you may have a broken wire on one of the resistors.
CCLINBTDT
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