Iv'e got pretty even compression in all 4...idles fine when its cold, but once full temp is reached cyl #2 starts missing.fuel and spark both seem to be there, any ideas?

 

valve adjustment ?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DaveF &raquo;</TD></TR><TR><TD CLASS="quote">valve adjustment ?</TD></TR></TABLE>

that was my first thought, but i checked the offending cyl., and if anything they are a little bit loose ( measured out .05, and .08 intake and exhaust respectively)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StylishDOHC &raquo;</TD></TR><TR><TD CLASS="quote">

that was my first thought, but i checked the offending cyl., and if anything they are a little bit loose ( measured out .05, and .08 intake and exhaust respectively)</TD></TR></TABLE>

can you verify with a spark too that when warm all cylinders are firing, they are an inser that either go between the dizzy and the plug wire or at the other end, some also look like a test light.

you may have an issue with a bad coil or ICM (even tho most will say they either work or dont) anything is posible with electricity.

you could have a joint pulling away once warm but relaxed when its cold and making contact, similar to the older EF main relay issue

 

Yeah i tried another known good distributor and got the same deal.....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StylishDOHC &raquo;</TD></TR><TR><TD CLASS="quote">Yeah i tried another known good distributor and got the same deal.....</TD></TR></TABLE>

have you checked your grounds? maybe try to scuff the base metal a tad and re ground the eyelets?

 

check grounds i had the same problem

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegman23 &raquo;</TD></TR><TR><TD CLASS="quote">check grounds i had the same problem </TD></TR></TABLE>

yeah im gonna attack the whole harness tomorrow..its a DPFI car converted to multipoint, and its an EF ....If that doesnt solve it i'll throw in some stock injectors and take the S100 out an see what happens...this sucks

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by StylishDOHC &raquo;</TD></TR><TR><TD CLASS="quote">

yeah im gonna attack the whole harness tomorrow..its a DPFI car converted to multipoint, and its an EF ....If that doesnt solve it i'll throw in some stock injectors and take the S100 out an see what happens...this sucks </TD></TR></TABLE>


Very much so, I chased an electrical demon for over a year, i would literally lose 100hp when it started misfiring

I went thru the dizzy, seemed a tiny bit better, checked all grounds, checked injectors, resistor box, ecu.

it all came down to a short in my harness leading thru the dash.

 

Ok...problem solved....one of my RC 550's was bad