Life expectancy of GTE coil packs?

[IwantMKIII]

Well i have acceleration problems...it pulls damn hard and will take a stang anyday but acceleration is not smooth. I had a leaky EGR and just yesterday blocked it off. Still have the problem but not as bad. I have original coil packs from my '88 with 170K miles on them. I was leaning towards maybe insufficient spark causing my issue, so what is the average life expectancy of a coil pack? Are mine due for a change? Is it possible they are not giving enough spark? is there a way to check this??


EDIT: I did the resistance check which resulted in .5-.6OHMS - good
I did continuity test and all tested infinity/0 - good
Check coil pack 1 voltage: 11.7-11.8V - good
Check coil pack 2 voltage : ~11.8 - good
Check coil pack 3 voltage: 0 - not so good???? whats going on??

EDIT EDIT: please check the other thread for this since its a new topic in a sense. http://www.supramania.com/forums/showthread.php?t=56091

 

[a_sesshoumaru]

when mine got bad it sounded like rod know when i started it in the morning, after i changed them it started very smooth

 

[starscream5000]

Have the originals on mine, so I'd say they are good for at least 20 years .

 

[IwantMKIII]

^lol true. Is it possible though one could be giving spark but not enough, causing a choppy acceleration pattern but still a strong one??

 

[starscream5000]

Check the TSRM, there should be a troublshooting section in there to show how to check to see if the coil packs are busted.

 

[mhopemk3]

Check the TSRM, there should be a troublshooting section in there to show how to check to see if the coil packs are busted.

Right on!
http://www.cygnusx1.net/Supra/Library/TSRM/MK3/manual.aspx?S=IG&P=12

 

[figgie]

life expectancy,

hmm

let see

1987 to 2004
225k miles.

that is at a minimum

 

[s turbo 87]

1987-2007 274k miles original coil packs...I havent heard much about them going out on our cars, but it is certainly possible. This is why parts car rock, you could just swap them out and see if you can tell a difference. If you determine that you need the coil packs I've got a set that came off of an 89 turbo w/160k miles, just shoot me a PM.

 

[IwantMKIII]

Is it possible though for them to give off a weak spark?? or would they just not work?

 

[starscream5000]

Possible if they are malfunctioning. Test them first like posted above before you go spend needless money and time on something that may not be the problem.

 

[IwantMKIII]

deal just gotta find ohm/volt meter

 

[IwantMKIII]

New question: I just did the resistance checks and recieved resistences as high as .6OHM thats .1 over what spec calls which should be OK. However. I did the voltage check and found both coils on the left (if youre facing the engine) got just under 12V around 11.7-11.9. The last coil has no Voltage reading....what does this mean?????

BTW continuity test passed for all coils

 

[Poodles]

bad connector?

 

[IwantMKIII]

^but wouldn't that mean i get no spark in that coil? My car runs....? Is it possible its running on 4 cylanders??? thats seems wierd

I disconnected the connector that plugs to the 3 wires for the coil pack and tried to test for voltage but couldn't get voltage on any wire? I grounded the terminal on the multimeter to the car and didn't get any voltage? did i do that incorrectly?