Bad Misfire / backfiring when shifting

[strang3majik]

Well. Had the first issue with the glhs tonight.

Whether it has anything to do with it or not, I accidentally stalled it out when turning around in a tight parking lot (we all have our moments. :/ )

Anyway, it was hard starting after that. Thought it was kind of odd but seemed to be running fine. Throughout the night it seemed like it didnt quite have the power, so I took it easy on it...was sitting in the Wendy's drive thru and pulled away, car sounded like a Subaru.

Tried revving and it was a bad miss. Pulled number one plug wire, no change. Pulled number 2, didnt sound different either. I stopped there and babied it home (less than 5 minutes away).

But. With the miss it sounds like a Subaru and when driving it home it did a light back fire on decel or when shifting. Smelled like fuel so ill be changing the oil.


But thoughts? Think when I stalled it it might have jarred the timing belt off a tooth? And it just got progressively worse? Ill be pulling the plugs tomorrow night when i get home and will try and check the timing, but just trying to get some ideas.


It does have an mad 6al as well that has me skeptical. It's getting hot --- spark though.

[turbovanman²]

My guess's are timing belt jumped or the auxillary shaft stripped.

[strang3majik]

Lets hope for the timing belt jumping. Ugh.

Broke it already :/



If the auxiliary shaft stripped wouldn't the distributor not be spinning?

[RoadWarrior222]

If it broke a couple of teeth, it coulda skipped by those 2 teeth and still spin, unless you stop the motor dead on those teeth again, then it may not start.

[85boostbox]

Check codes before you start digging to far. Could be as simple as a vacuum line that popped off.

[ScottD]

I would look at the vac lines also. And check codes.

[strang3majik]

I checked all the vac lines. One cap came apart but didnt make a difference. Honestly felt like a boost leak at first then missing.

But checked all the piping and it all looked good.

And I'll look into checking codes.

Car starts and runs everytime, just runs rough. Like I said it sounds like a boxer engine

[168glhs1986]

I know when I got it the timing was advanced. I'll check with Pat to see what we dialed it back to.

May not be the causes and I know very little about fixing cars...but a few things I would do....

Change the fuel filter

Swap the stage II computer with the one out of my GLHS.

Can you do an ohm check on the injectors?

Maybe swap injectors with other +20's (other forums say a bad injector will cause a car to sound like a boxer engine).

I installed new spark plugs and gapped them to 17 IIRC.

I have the old ones here and there was zero sign of excess fuel / detonation/ etc.... They looked great.

Good luck and keep us posted.

[85boostbox]

As stated though before you start swapping parts check codes. Kept it simple and less aggravating possibly.

[Pat]

I know when I got it the timing was advanced. I'll check with Pat to see what we dialed it back to.

.

I set it at 12 degrees...stock.

Check codes and vacuum (always a good first check) but if it's missing, cam timing or aux shaft timing issues would be unlikely since all four would be off and not just two. Worth checking, but I'm not sure that would do it. Start it and wiggle the injector harness around a bit. I'd also look at the distributor itself. Sometimes the plastic rivet that holds the "window" that spins and is picked up by the HEP breaks and it rattles around.

[strang3majik]

I checked codes and compression...(been talking to 85boostbox (thank you btw for helping))

Anyhow...just flashing 55, so no codes, and the compression is down on cylinder 4.

Pulling the valve cover to see if its in the valve train.

But...

Cyl 1 - 135
Cyl 2 - 145
Cyl 3 - 145
Cyl 4 - 55

Dropped some oil in it and no difference. Still 55 psi.

[85boostbox]

That is what I am here for and all of us are here for. I told him since he has low compression on 1 cylinder and not 2 to take the valve cover off and check the rocker arms. And then also to check lifters. Keep us posted on what is going on. And you know my number if you need anymore help.

[strang3majik]

Thar's my problem. Haven't pulled the valve cover completely off since the car is outside and its pouring, didn't want to get everything drenched inside, but llifted the side up and found that ^^^. Think that explains it.

:/

Oh well...better than a headgasket I suppose.

[168glhs1986]

Thar's my problem. Haven't pulled the valve cover completely off since the car is outside and its pouring, didn't want to get everything drenched inside, but llifted the side up and found that ^^^. Think that explains it.



:/

Oh well...better than a headgasket I suppose.

what the hell is that?

[strang3majik]

What the hell is it?

Its half a lifter. I sent you a text. You by chance know what manufacture these are?

The other half is still in there somewhere as is the rocker. I'll get those out tomorrow.

[168glhs1986]

Its half a lifter. I sent you a text. You by chance know what manufacture these are?

The other half is still in there somewhere as is the rocker. I'll get those out tomorrow.

Let me look at the receipts, maybe in there......hold tight.

[168glhs1986]

I see purchased in 12/2007 and part # listed is 213-1722.

---------- Post added at 10:38 PM ---------- Previous post was at 10:28 PM ----------

http://www.ebay.com/itm/CHRYSLER-DOD...9be8c1&vxp=mtr

Here they are.

[ScottD]

Wow. Never seen one break like that.

[strang3majik]

I have skills few can match. Lol.

My dad broke a lunati lifter like that in his 440 in his charger. Must be my family's luck with chargers :/

---------- Post added at 01:50 AM ---------- Previous post was at 01:48 AM ----------

That is what I am here for and all of us are here for. I told him since he has low compression on 1 cylinder and not 2 to take the valve cover off and check the rocker arms. And then also to check lifters. Keep us posted on what is going on. And you know my number if you need anymore help.

And once again you're a genius. Good call! Haha. Thank you again!

[168glhs1986]

This is covered under the 7 day unlimited mile warranty. Got it by 2 hours. I'll sent$25 for a new lifter. What's your paypal addy.