MSD ignition unit

[tomp]

Michael, code 300 can be triggered by several different serious performance enhancing mods causing this "false" codes. IE: cams or ignition upgrades.

This is why the Diablosport programmer includes the option to turn the trigger off for code 300. Once you disable the 300 test mode, you should no longer get code 353 as well.

[Alt-F4]

Thanks for the heads up Michael.

Tomp what do you mean by "faulse" code? Do you mean a code that doesnt exist ie...attach to an actual problem.
Or that the computer doesn't understand how to read the multi spark / hotter coil and it just bugs and pops out code 300?

Thanks for all the responses .

[HUMMERcustoms.com/TAZ]

You may have done this but, when you go to the more powerful coils You need to go to high performance plug wires. 8mm or something like that. I like Taylor wires and you can get them at most performance stores around any town. I have seen the factory wires not able to carry the stronger current and the wire basicly allows an arc to metal causing a miss.

The things that makes me scratch my head is you swapped out to a stock coil and same thing happened unless i missed as to which coil pack you made switch with.

TAZ

[tomp]

Originally Posted by Alt-F4

Thanks for the heads up Michael.

Tomp what do you mean by "faulse" code? Do you mean a code that doesnt exist ie...attach to an actual problem.
Or that the computer doesn't understand how to read the multi spark / hotter coil and it just bugs and pops out code 300?

Thanks for all the responses .

It may or may not be a problem. You have to determine what you are dealing with...IE: if you installed HP cam or you have an ignition problem or is it related to a mod etc.

[Michael Baker]

Taz:
Simultaneously with the MSD ignition coils I also purchased the MSD 8.5mm superconductor spark plug wires (MSD 32829). Unfortunately (as in another thread on this same site), once installed the boots are too close to the headers, and started to show signs of melting. So I had to replace them again with the standard wires until I find a solution for this problem.

When I got the PO353 code I swapped out the 3rd coil for the original one, and still got the same PO353 code - that's what I meant. The car works fine for some 5-10 mins, but then starts to miss.

[Michael Baker]

Update:

MSD technical support asked me for the model numbers of the original coils on my H2 (12558693 H6T55171ZC). It seems that they then went out and bought one, and have now determined that they do NOT have a coil compatible with the ones on my H2. They say thay MAY have one in the future.

So I now have to get a refund......

Anyone else interested in these coils should call MSD support with the serial numbers of their current coils to check compatibility.

[IRA51]

It's a good thing I'm a cheapskate and didn't get those coils ,the price was the only thing that stoped me . try the heat sleeves on the wires or use header wrap and no more burnt wires .or if you realy want to do it right send your headers to JET HOT Coatings or buy a set of cermic coated headers .your engine compartment will be alot cooler too.

[Alt-F4]

Thanks for the update Michael.