is my dizzy and coil pack failing

[pedalpusher90]

So I just rebuilt the top end of my motor., and im misfiring my 4th cylinder.
New spark plugs
new wires
new dizzy cap
new dizzy rotor
so at first when i start my car it revs to 25k rpms
than it will stay that way for about 10 seconds and slowly drop
after that it than fluctuates between 1k-25k rpms
after it warms up when im driving i have a severe lack of power before 2k rpm
just tonight i came to a red light and it dropped to 800 than to 600.
a little later it started to idle at 1.5k-2k and when i would decelerate the car would just keep running the same speed.
now it fluctuates between 500-600
Here's a curve ball when i went to look under my hood my header was glowing red through my titanium wrap and my fuel pressure is at 35psi.
can somebody please help me im really tired and frustrated

[drummersteve7]

sounds like your timing is off.

[pedalpusher90]

electrical or mechanical
I thought i douple checked the valve timing
when i went to do the spark timing..... oooops i timed it from the 4th plug and not the 1st guess i need to do that what about the missing in the 4th it has a very eratic spark

[Losiracer2]

your head was GLOWING RED? I would stop driving it right now. It shouldn't get that hot. Your timing is probably a couple teeth off on the T-belt.

The distributor should be centered in the cylinder head adjustment range, if its turned way CCW or CW, then your physical timing is off and you have to remove the belt and slide it back on correctly.

But it also sounds to me that your IAC, idle air control valve is bad, if it fluctuates like that

[pedalpusher90]

i know im not more that one tooth off on my belt, and my header is glowing red not the head, that would really suck

[Losiracer2]

i know im not more that one tooth off on my belt, and my header is glowing red not the head, that would really suck

oh whoops, i meant to say header. But yeah do you own a timing light? its pretty easy to check to see if your car is timed properly.

[pedalpusher90]

yes i do own a timing light and it is pretty easy to do it

[pedalpusher90]

Alright so i checked my camshaft timing and my electric timing and both are good. This is one of those all of the sudden things. My car ran fine for 150 miles minus the misfire in the 4th cylinder. so when i press the clutch while my rpms are above 2k the ca car will idle at about 2500 and than drop after 10 seconds. If I press the clutch in while im under 2000rpms the rpms will drop to 800 than fluctuate between 500-700rpms i really think this is an ignition problem but please help me me out.

[pedalpusher90]

Alright so the fluxuating rpm is a vacuum hose leak which i will fix this weekend. The misfire happened to be either a coil pack or distributor, which i replaced both last night. and i am going to replace the IAV valve this weekend aswell to see if that fixes my wierd idle issue.