Another trouble code post: Code 73
 

Im working on my buddy crx with GSR swap and it keeps missfiring on #3. It ony does it in the higher rpms like above 5k. You can hear a tick in one of the valves but I checked them and all are within spec. Could be some valve float from a busted internal spring on the intake??? Unlikely but you never know. cap and rotor look a little beat up so I will recomend he replace anyways. Any suggestions would be helpful, Thanks!

So I know its not valve float cause it did it to me in the lower rpms. Leaning twards ignition problems. Has this happend to any of you guys?

Re: (dahoopdahup)
 

Check the simple things, spark, fuel and what not. I myself would toss in another set of spark plug wires and see what happens.

Re: (90blackcrx)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90blackcrx &raquo;</TD></TR><TR><TD CLASS="quote">Check the simple things, spark, fuel and what not. I myself would toss in another set of spark plug wires and see what happens.</TD></TR></TABLE>

A volt meter can do the same... Check for resistance in the wires and see if 1 is firing weaker (code 73 I would isolate this wire and go from there). Then you do the usual, replace wires with known working. Replace spark plugs. Replace dizzy with known working one until the problem is determined. More then likely just worn ignition parts.

To be honest, you should replace everything when you do a swap (plugs, wires, cap and rotor) just to make sure it's all 100% new and then you know when to replace it. At the same time, check the resistance in the ignitor and modulus to see. Infinite resistance means they are fried. I'd rather know that info even before I start the swap then to have it not fire up infront of a customer...

Re: (ludesrv)
 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ludesrv &raquo;</TD></TR><TR><TD CLASS="quote">
A volt meter can do the same... </TD></TR></TABLE>

But if its only breaking up at higher rpm's it won't . We keep a set of extra wires just for cases like this.

Re: (90blackcrx)
 

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

But if its only breaking up at higher rpm's it won't . We keep a set of extra wires just for cases like this.</TD></TR></TABLE>

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dahoopdahup &raquo;</TD></TR><TR><TD CLASS="quote">it did it to me in the lower rpms.</TD></TR></TABLE>

Hmm...

The car is off when you check resistance...you don't want to be touching wires alot when the car is running especially with a volt meter. You might ground yourself and that fucking hurts. I've been shocked by a bad ignitor before and it wasn't so nice on my arm lol.