Thread: Throwing codes

Thanks. I'm still chasing the misfire problem.....I'm looking at the coil packs next. Still need to clean up the connections to see if that helps.

I wonder why it only misfires when it's idling?

Can vacuum leaks cause misfire?

Well how in the heck do I check for vacuum leaks?

Ok. Thanks. I'll try that. The car runs perfectly with no misses until it warms up, so, maybe a vac leak is the problem.

what's the silver thing in the picture? It made a air leak sound when I moved it with the car shut off.

You have a boost gauge that shows vac on the car don't you?
If so whats the vac reading at idle?

Originally Posted by 231FUN

You have a boost gauge that shows vac on the car don't you?
If so whats the vac reading at idle?

Just warmed it up and checked. Between 19-20. What should it be?

Found this.......http://www.gregsengine.com/using-a-vacuum-gauge.html Seems like it's telling me my Halfassery is ok........

Originally Posted by Scottydoggs

let it idle, spray carb cleaner at all the vac lines and sensors, if the idle jumps up, you found a leak area.

Did it. No leaks found....... still random misfiring. CRAP!

Was the vacuum steady or was it bouncy? I've dealt with this before...and I have pictures of the problem I found...and they aren't pretty.

Originally Posted by Sven Sexman

Was the vacuum steady or was it bouncy? I've dealt with this before...and I have pictures of the problem I found...and they aren't pretty.

vacuum seems very steady.
what did you find?

Seized roller on a lifter that wiped out the cam...sent metal all through the engine...we hoped we got it all flushed but ended up having to replace the engine shortly thereafter.

Originally Posted by Sven Sexman

Seized roller on a lifter that wiped out the cam...sent metal all through the engine...we hoped we got it all flushed but ended up having to replace the engine shortly thereafter.

It couldn't have been running to well though, right?