Are these bad ??

[MRKING]

They had 5 min run time before I installed my bad msd digital 6 .Now The truck wont start . I have changed the distibutor , cap , rotor , and coil . Plugs are next and then wires . Both ecm fuses are good (checked 2 times) . I am running out of ideas and these plugs were covered in gas , they dried by the time I got to take a pic .

 

[Don W.]

Re: Are these bad ??

Well what happens when you take the Digital6 out of the circuit? Obviously there's no spark here. What coil and what module?

 

[MRKING]

Re: Are these bad ??

When I put the digital 6 on , it smoked on connection of ground at battery . I killed power and removed it right away . The coil I changed for another msd coil . And is the module on the disrtibutor ? If so , it is new from napa with thier dist , cap , and rotor .

 

[James Thomas]

Re: Are these bad ??

Well what happens when you take the Digital6 out of the circuit? Obviously there's no spark here. What coil and what module?

I find it hard to swallow that all 6 plugs would go tits up at the same time, I doubt if Vegas would give you odds on that. If you have a bead blaster you can clean them and try them again (or one of those little media type plug cleaners). I think I agree with Mr. King though, swap out the module and try that. Coils do go bad also but not quite as often. Are you 100% shure it's the MSD. If the module or coil is bad, the MSD won't fire anyway. I assume the truck doesnt even try to fire at all, not even on 1 or 2 cylinders? If so it most likly is not the plugs. Gonna have to run the trouble shooting steps per the manual to verify power and connections to the Dist. is a simple module / coil swap don't take care of it.
____________
James Thomas

 

[MRKING]

Re: Are these bad ??

i dont think the plugs went bad from the msd box . I was more thinking they got fouled from me attempting to start over and over after each removal and replace of each new part . I dont know how easily plugs get fouled , but soaking them with gas repeatedly (20-30 attempts at least)and occassional spark , I would think that could possibly do it .I had already changed the module, coil ,cap ,rotor , and distributor before starting this thread . I got a ignition spark tester , meter , and new plugs just now . Round 3 coming up .

So far : Syclone +2 / Me +0

 

[NecroWolf]

Re: Are these bad ??

i had the same problem w/ my plugs when i was tryin to sort out a set of map sensors when i changed out to a three bar chip and was given a map sensor, all when i had a couple of injectors sticking same thing all six went bad

 

[MRKING]

Re: Are these bad ??

I put the spark tester on ther just now and NO spark . I am out of options now and must search for more ideas . Unless the wire went bad and wouldnt allow enough voltage through to the tester , I cant think of anymore obvious things to check . Time to go through the manual to look for diagnostic procedures .

 

[QUICK STORM]

Re: Are these bad ??

i would replace the ignition module and check your distibuter cap, rotor etc.....

 

[James Thomas]

Re: Are these bad ??

I put the spark tester on ther just now and NO spark . I am out of options now and must search for more ideas . Unless the wire went bad and wouldnt allow enough voltage through to the tester , I cant think of anymore obvious things to check . Time to go through the manual to look for diagnostic procedures .

YUP YUP....It's a bitch but sounds like you have covered the obvious.
________________
James Thomas

 

[MRKING]

Re: Are these bad ??

She runs good now .

 

[QUICK STORM]

Re: Are these bad ??

what did you figure the problem to be?

 

[MRKING]

Re: Are these bad ??

what did you figure the problem to be?

Sorry branden , I didnt see your question before .I found the plugs were bad and the timing was off . Now I am just seeing what my truck likes and will make changes to my cranking fuel tables if the plugs keep getting fouled from starting . Third set in 3 weeks is my record so far . Here is more info on how my truck behaves . http://www.syty.net/forums/showthread.php?p=362033&posted=1#post362033

 

[Don W.]

Re: Are these bad ??

Hey, don't blame the plugs. It's not their fault yur rich on startup!:roll: What do they look like after a pull? What I'm getting at is that having the correct heat range "under load" is critical. Then you can fix your rich startup/idle/whatever.:2cents:

 

[MRKING]

Re: Are these bad ??

Hey, don't blame the plugs. It's not their fault yur rich on startup!:roll:

I knew the plugs went bad from timing being off and them swimming in fuel . I wasnt blaming them though, I actually like the TR5's . I almost went with the TR55 or TR6 but I decided on the higher heat range plug . With the issues I've been having , I wanted to find all the problems first before I get myself stranded on the road somewhere . Plus my trucks not currently registered .Its been 2 years almost 3 and I will be on the road again soon . Thanks .I will try to fiddle some more with it tommarrow and let you know what I find .

 

[typhoon92]

Re: Are these bad ??

MRKING what wire harness did you use to hook up your msd digital 6? I last my instructions for my digital box and need some help wiring the box up?

 

[MRKING]

Re: Are these bad ??

I used the msd plug'n'play harness . I cant remember the part number off hand , but if you go on summit or jegs its the one for the gm dual connector coil .

**Edit** , I looked it up and its the msd #8876 harness .

You just plug both sides of the coil wires onto the msd plug and only one plug goes back onto the coil from the msd harness . I can also shoot you a pic later if you want .

 

[typhoon92]

Re: Are these bad ??

I used the msd plug'n'play harness . I cant remember the part number off hand , but if you go on summit or jegs its the one for the gm dual connector coil .

**Edit** , I looked it up and its the msd #8876 harness .

You just plug both sides of the coil wires onto the msd plug and only one plug goes back onto the coil from the msd harness . I can also shoot you a pic later if you want .

Thanks for your help! If you can post some pictures I would appreciate it!