Breaking up above 4000rpm - ignition?

[BLACK6PACK]

Just broke the car out the other day after a 4 month slumber. It runs fine, idles fine etc, but it breaks up at around 4000 rpm. Kinda like I'm loosing all spark. The ignition is 200k original. What parts should be replaced?

 

[KEVINS]

Bad gas???

 

[Turbojorge]

Sounds like it's time for a new coilpack/module. My car did the same thing before I replaced mine.

You should have gotten on it sooner and found out what it was doing before the meet this Sat. I would have lone you mine so you could have taken a spin with it to see if it was the problem.

You taking her up to Bradenton?

 

[Steve Wood]

I would try some fresh gas first....could be the gas age as well as some scammer injectors?

 

[BLACK6PACK]

I always have some bad gas, oh, you ment the car! I guess I could try changing out the gas first, but it's time to replace the coil pack and ign module. Anything else while I'm at it? Like I said, it has over 200k miles on it. Injectors should be good, they only have something like 500 miles on them.

I may take it to bradenton if I can work out the bugs. The farthest my car has been since i've owned it is to moroso.

 

[machinegun]

First things first. If the gas you have has been sitting there for 4 months then first replace the gas. I would then get yourself a new set of plugs. Gap them appropriatly. Check all wires and coil towers for corrosion and or damage. Ohm across coil pack terminals and the wires to see if there is anything wrong there. Put it all back together once all of this is checked out and verified to be in proper working order. Try it and see what happens.

 

[Turbojorge]

Originally posted by BLACK6PACK
. The farthest my car has been since i've owned it is to moroso.

Me too. I know it will make it. I'm trying to get a trailer so I can run in the 12.00-12.99 class without any worries at all. If not, I'll stay conservative and run in the 13.00 class. It's a LOONGGG ride you know and I do have 160K+ miles on this motor.

The point is we all go out there, race and have some fun no matter if you run 10's or 15's. It's going to be a blast dude.

http://www.turbobuicks.com/bradenton.html

 

[Steve Wood]

I mentioned injectors because it has been sitting for four months with old gas in the rail...some of the gum may be in the injector screens...may dissolve? may not?

 

[Chuck Leeper]

bad gas??

Sounds like a story from Chris Cairns!!
Don't forget the fuel filter too. !!

 

[BobbyBuick]

alot of times the plug wires will corrode at the coil pack terminals check to make sure they are clean .,grounded coil pack ,ohm it out across terminals.

 

[Turbojorge]

Originally posted by BobbyBuick
alot of times the plug wires will corrode at the coil pack terminals check to make sure they are clean .,grounded coil pack ,ohm it out across terminals.

Sometimes they will ohm out perfect (somewhere in the high 11.xx) and it can still be bad. Best way will be to swap for a known good one and see.

But I have to agree to check the gas first. Run some xylene with some fresh 93 octane (what is it like 2.75 a gallon around here now!!) threw the system, that should clean everything out.

 

[Scott231]

FYI - A corroded or loose battery ground cable has also been known to casue a ~4.000 RPM breakup scenario.