Topic: My mkIII finally let me down (Read 2539 times)

Barry · « **on:** April 19, 2009, 12:48:29 AM »

So.. I was driving home on Friday, and ran into some standing water. The water drenched my coilpack, and apparently, there were the very common hairline cracks in it, or at least there are now....

I tried the $5 epoxy fix, and there is still a horrible mis-fire. Does anyone have a spare VR coilpack laying around that I could borrow to make sure it is in fact a bad pack? I'd hate to buy a new one only to find out there is a different problem... I'm trying to get a solution on paper by tomorrow night so I can proceed accordingly Monday.

Let me know!

Giggidy · « **Reply #1 on:** April 19, 2009, 04:26:21 AM »

I'll bring mine up tomo to use as a guinea pig..... assuming it's the same coil pac...

scurvy_bandit · « **Reply #2 on:** April 19, 2009, 07:43:08 AM »

Yours is a turbo coil pack will it fit

Hopefully I'll swing up today.

Barry · « **Reply #3 on:** April 19, 2009, 08:18:13 AM »

Yeah.... VR coilpack is a VR coilpack...

Give me a call before you head up, my lacrosse game starts at 11, and should be done by 1 or 2 at the latest.

Matt... do me a favor... bring that CD I left in your truck up

Barry · « **Reply #4 on:** April 19, 2009, 04:24:29 PM »

Ok... so I tried swapping a coilpack off of Mike's mkIV that he epoxy fixed a few months ago... It was working fine on his car when he took it off.

I had to swap the back plate that had the harness connection because the mkIII and IV harness connectors are different.

Same results: Good idle, but horrible misfire under any kind of load. No CEL either.

Any ideas?

LOS · « **Reply #5 on:** April 19, 2009, 04:31:30 PM »

Maybe you fried some wires. Check your plugs too.

scurvy_bandit · « **Reply #6 on:** April 19, 2009, 04:46:55 PM »

plug wires, plug or POSSIBLY the cat could be broken down.

Barry · « **Reply #7 on:** April 19, 2009, 05:19:58 PM »

swapped the coilpack and wires in matt's car... and put new plugs in.. no go

Jesus · « **Reply #8 on:** April 19, 2009, 06:10:01 PM »

Have you scanned it yet... I know there's no CEL but I would still scan it

Barry · « **Reply #9 on:** April 19, 2009, 07:49:42 PM »

Carlos is going to scan it tomorrow

mikeminnillo · « **Reply #10 on:** April 20, 2009, 06:56:24 AM »

im pretty sure its a miscalibrated vtak.

Barry · « **Reply #11 on:** April 20, 2009, 07:18:25 AM »

Smokestack · « **Reply #12 on:** April 20, 2009, 08:09:54 AM »

Air, spark or fuel. Spark's pretty much ruled out. Maybe moisture in the injector harness? Only other thing I can think of is a minor hydrolock that cracked a ring. Can you tell which cylinder is missing? Maybe it's being stupid with timing retard from something like a faulty crank position sensor.

Barry · « **Reply #13 on:** April 20, 2009, 09:11:06 AM »

Considering that I have a stock intake, and that the filter was dry, I am going to say hydrolock is out. Additionally, I don't think the car would idle smooth with a bad cylinder.

I am going to run some fuel treatment in it tonight with 5 gallons of fresh gas (pretty much empty now).

I am also going to disconnect the cat, and see if that improves anything. I can't explain how running a 150K mile cat through some standing water would ruin it, but I have a feeling it can. Additionally, checking for flow out of the tail pipe, there is none. There is some steam from the condensation, but no pressure what so ever...

SwiftMKIII · « **Reply #14 on:** April 20, 2009, 09:44:39 AM »

Quote from: GotMyDub on April 20, 2009, 09:11:06 AM

I can't explain how running a 150K mile cat through some standing water would ruin it, but I have a feeling it can.

Once it starts to clog, it gets stupid hot. This you run through some cold water and it splashes up on the cat and breaks up some of the super-heated material. Bam, you got an almost completely clogged cat. A partially clogged cat may have been what was slowing it down before.

Just a thought, though I am not positive it is possible.

Barry · « **Reply #15 on:** April 20, 2009, 10:01:24 AM »

yeah... thats what I was thinking too... Either way, clogged or not, when I disconnect the cat from the downpipe tonight, it will be getting hollowed out.

SwiftMKIII · « **Reply #16 on:** April 20, 2009, 10:14:14 AM »

That will definitely be noticable. Especially if it is doing what I thought it could be doing.

Barry · « **Reply #17 on:** April 20, 2009, 10:56:51 AM »

what are you doing tonight? Wanna come up and have a cat hollowing party?

scurvy_bandit · « **Reply #18 on:** April 20, 2009, 11:06:01 AM »

I may make it up tonight man. I need to drop off some scrap metal first

Barry · « **Reply #19 on:** April 20, 2009, 11:07:56 AM »

that'd be cool if you came up... hell... you could even throw those 3 19" garden hose reels in your truck to take in for scrap...

SwiftMKIII · « **Reply #20 on:** April 20, 2009, 11:12:49 AM »

Quote from: GotMyDub on April 20, 2009, 10:56:51 AM

what are you doing tonight? Wanna come up and have a cat hollowing party?

Let me see about what's going on tonite. I'd like to get rid of my exhaust restriction as well.

Barry · « **Reply #21 on:** April 20, 2009, 11:16:41 AM »

Well... I really do hope my probelm is the cat... if its not, then the POS will still be in the garage.

sad_rocc · « **Reply #22 on:** April 20, 2009, 01:34:46 PM »

I had a cat clog and overheat. I was driving around and my car pretty much just stopped moving. I managed to get it into a parking lot and a guy said he saw a couple glowing red bits shoot out the exhaust. Removed the cat and had a good time smashing it into things like the side of a dumpster to break up the ceramic inside, reinstalled and no problem. It was quite fun watching little leftover bits come flying out of the exhaust as I gunned it to remove all the ceramic.

Barry · « **Reply #23 on:** April 20, 2009, 01:49:59 PM »

Yeah... I will be bashing a pipe through the center section of mine tonight

scurvy_bandit · « **Reply #24 on:** April 20, 2009, 02:00:16 PM »

Quote from: GotMyDub on April 20, 2009, 01:49:59 PM

Yeah... I will be bashing a pipe through the center section of mine tonight

That can be so fun.

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