I need help, i didn't drive my car for 2 days over the weekend (87 transam 305 F.I. ) i started the car in the morn. it drove fine for 5 min. then stalled i started it back up and then it was buckin so i turned it around and barley parked it and stalled again, no for 3 days it won't start , just cranks thats it so in my diagnosis i have ( tested ignition module , coil , replaced distributor , distributor cap , and rotor. and im still not gettin a solid spark. the spark is either nonexixtant or very weak ??? what do i do next i also have check all fused in fuse panel. i am almost at the end of my rope so i am takin it to pontiac tomorrw to diagnose unless somewone here can help me !!!! PLEASE HELP!!!

 

Sounds like the pick-up coil to me....You know what I'm talking about?

If you have tried other distribitors and get no spark, It has to be in your ECM or wiring...if all the other components have checked out.
By the way, Welcome to the boards..

 

If you had the ignition module tested at a Parts store, that's like having it not tested at all. When my car wouldn't start, the ignition module tested good, but when I replaced it, the car started right up. I know there's at least a dozen people on these boards who can back me up there. Also, check to see if you're getting fuel cause if your not getting that either, it probably is the ignition module.

Tom

 

I not only had it tested but also got a new one with the new distributor??? and still doens't work long w/ a new pick-up coil.
ANY other thoughts? oh and by the way as u can see i have been here for like a year just been readin thats all.

 

I'm sure the spark plugs and wires are good, right? And you've made sure all the wiring and connecters are in tact and making good connection?

 

yup wires are good cause 1 just replaced them 6 months ago 2 all wires are doing the same thing weak barley existant spark. no rythem at all and when it does fire its weak??? any thoughts?

 

are you sure you had the coil checked?

if i'm not mistaken the pickup coil just tells the coil to fire, so it loos like it's doing it's job i think the coil just has went out and not delivering a better spark that will ignite the fuel..... because if the pickup was bad then i don't think you would have spark at all...

personally i never ran into this prob but i'm just trying to help...

 

You really need to get a volt meter and do some testing....I had this problem myself...I rebuilt the distributer and the problem went away.....could have been any of the components. Keep us posted on this one..ok?

 

Have you tried bypassing the EST to see if it will help?

 

I forgot about that i will try unhookin the computer from the timing but will the computer still control spark fire ?