ok ya'll my truck is doing the typical low rpm miss with no cel. so I want to know are msd blasters any good?? ive heard they are great from some, and others say they come out of the box no good? I know you can get all 8 motorcraft dg511s for $260 from walmart but the blasters are $240 from amazon. im not trying to cheap out i just want something that will last a long time and make the problem go away. so blaters vs motorcraft dg511s? which are better? thanks in advance. 2006 xlt 5.4 4x4

 

Why not change the plugs first? Coils are probably fine if you're not getting a CEL.

 

and install new boots and springs

 

^^^ both of these ^^^

 

Don't change all the coils first. As stated boots and springs, and plugs! Coils rarely ever go bad.

 

My truck was running like pure crap 2 weeks ago missing.


I changed out all the plugs and did the boots/springs, and the truck runs perfect now.


Also, when you do the boots/springs you can OHM out the coils to check them (there are 2 checks per coil, one is like 5k ohm the other is almost a short I think, do a search) . My coils are 11 years old and they all checked good, just the boots/springs were beat up. Also, spray some electrical contact cleaner inside the coils where the spring attaches when you install the new spring, and also use a small file to clean out any corrosion.




All new plugs/springs/boots will set you back about $100, lot less than a new set of OEM coils.

 

You Tube

This guy has a pretty good method.

 

They rarely go bad . Clean yours up . New boots . Clean out holes with carb cleaner . An ohm check will spot a dead coil but it can't check one at 30000 volts . So it can still be bad after a good ohm check . The boots are more likely to fail at 30kv --replace them and use dielectric grease . And if you don't clean sparktip holes out you are going to be forcing new plug thru hard carbon . Then you are going to try to figure out which plug may be bad .

 

I followed these guys advise a while back with spectacular results. In the thread I posted nobody mentioned to clean the coil packs but when I took things apart I noticed on the output side of the coil that there was some green corrosion so I cleaned the coils there.

My 06 only had 55k on the clock (plugs rated for 100k) but they were visibly shot to my surprise. Others stressed that new boots were definitely a good idea and they aren't expensive.

So I'd definitely start with plugs, boots, and clean the coils.

You do know that getting the factory plugs out can be a PITA right? If not need to read up on that or just ask.

 

This. ^^^^ If it's the 1st plug change on the truck, it can be a huge pain. If it's the 2nd, they should have the new design plugs which aren't an issue.