Allright, well I got my new MSD opti installed today, my upper rpm miss is gone! I still have a slight hesitation below 2500 rpms when uder load though. Has anyone experienced with the timing adjustment on this thing? I looked all over and I can't find anywhere where it tells you how much to turn it or which way=advance or retard timing.

 

What kind of cam? If it is stock you might not need to adjust it. These things have more problems then the Powerdyne superchargers. Is it the MSD pro billet?

 

Do you have a timing pointer and degreed, keyed hub/damper and know how to use a timing light? If not purchasing this was a BIG mistake and you are well on your way to ruining it and causing yourself lots of problems. I know that is not the answer you wanted but is the best you are going to get.

 

Why would I ruin it? I'm not just gonna adjust it for trial and error purposes, and the msd pro billet is supposedly set up to factory specs. I was just wondering what others experience with these were and if they had similar low rpm stumble that was fixed by adjusting it.

 

It is the stock cam, I should probably just leave it alone, the car runs really strong all the way up to redline.

 

I don't believe your low RPM stumble is caused by the indexed timing in the MSD. If it is timing realted, it would be assoicated with the programmed timing advance in the PCM. Additionally, I believe you should fix the stumble before you play-with the advance on the MSD.

Did you put the thread-locker on the rotor screws as I recommended in the other post?

WD

 

My comments are based on my experience cleaning up the mess someone made by trying to blindly adjust one. Since he did not have a way to check actual timing he did not know he was overtraveling the adjustment mechanism,

Seeing as they can't put the o-ring in and can't seem to get the rotor screws to stay in from the factory I think it downright asinine to trust they set it to zero.

I am not saying it is a bad part I am saying it is a problem waiting to happen in inexperianced hands again based on what I have seen in person.

 

Try cleaning your MAF, replace the fuel filter and run a bottle of good injector cleaner through it.

That cured my low RPM hesitation. Even if it doesn't, it's cheap and good maintenance. You can go from there.

I also had some vaccum leaks from the PCV air intake hose on the valve cover and the EVAP solenoid connection on the throttle body.

 

Good sound advice!

WD

 

Yeah, I did put thread locker on the screws holding the rotor in

 

I'm glad to hear that! Did you also use the new square O-ring?

WD

 

Yes, I used the square o-ring as well, took my car out for a test drive just a bit ago, I can say that I am very happy with the msd distributor Accelerates awesome, but just that slight stumble under very light throttle under 2500 rpms, oh well, take it one step at a time I guess.

 

Glad to hear the new MSD is working good for you and hopefylly it will end your distributor problems forever.

Now you can work on the stumble. Check fuel pressure and the regulator.

WD