now, after 2 weeks, 3 ignition modules, new plugs, wires, cap, rotor, pickup coil, coil,throttle postiton sensor, and about 400 dollars, i have a little question, and this is only if the car keeps starting!!!!! i test for spark and its a bright yellow color. im not sure what this means, i thougt somthing was bad unless it was blue. so just wondering if you can help me out thanks alot

 

Yellow is way too cold. Should be white or blue. Something's definitely wrong there. When you test the spark...how big of a gap are you making it jump? If you're giving it like an inch gap, then that would explain it....the longer it jumps, the weaker it gets. Should only go about....ohh I don't know measurements...a few centimeters? Basically, the distance between the center and overhanging electrode points on a spark plug. Which is not very far! Hope that helps.

 

Yeah, I've got a dark orange this is after a new coil cap and wires. I tested the old coil...dark orange. then I installed the new coil...Dark orange. Then I installed the exchanged new coil...dark orange. No more oem coils for me

 

Well OEM coils are considerably lower output than aftermarket coils. In most cases aftermarket coils put out at least 8,000-10,000 more volts than an OEM one.

 

i tested it on a old plug, just hooked up to the coil wire off of the ditributer, nixon, what do you mean by cold? almost my entire igniton is new!!

 

That's strange... What I mean by cold is... Higher voltage means higher temperature. Higher temperature means different colors.

White is a very hot color...so is blue, but it's slightly colder. I think orange is colder than blue...yellow is colder than orange...and red is relatively very cold. From what I understand, yellow is probably the bare minimum to keep the car running...which I find strange to believe...I've never heard of anyone having a yellow spark whose cars still ran. Most people complain about poor performance, check it, and they get some kind of multi-colored spark with mostly orange...

Are you looking at the spark in light or dark? It's hard to tell the color sometimes...gotta stare right at the centerline... It might be a little harder to tell on a spark plug.... I've always heard of testing it with either an ignition tester, or a screwdriver held slightly above a fender. I assume this is for a reason...maybe the spark plug adds resistance and you can't get a good reading from it?

 

.... in the light... but i put my hat over the plug!! ill try the screw driver test in the dark garage... but hey thanks for explaining it, it was a really light/bright yellow, maybe my eyes are seeing different, but ill do the screw dirver test in the DARK tomrow, thanks

 

No problem... If it's really bright, it might be close to white and in that case you've got nothing to worry about. Long as it isn't like obviously orange.

 

in the case that it is orange, what causes somthing like that, ( especially with an msd coil)?

 

The main stuff is either like...a bad cap/rotor or too much gap between the rotor blade and cap terminal...or a bad plugwire that you're testing on....or the coil is just going bad. If it's new, it shouldn't have any issues unless it's a hunk of crap. I have an MSD Blaster TFI coil...Ford's version of the GM HEI coil. I'll test mine sometime and see what color I get and let ya know...IF I remember!