gta_knight

Hi all,

Im trying to see if my distributor is at fault with my cars terrible running state, or at the minute its not even starting up, it just keeps cranking over and over.

Can the pickup coil and ignition module in the dizzy be checked with a multimeter at all, if so does anyone know what sort of readings i should be getting from them ?

gta_knight

Ok i found a guide on how to check the pickup coil and that seems fine, im getting a constant 827 Ohms even if i wiggle the wires around.

Im still looking for vids on testing the ign coil and module though

gta_knight

From what i can see you cant really test an ignition module on the bench with a multimeter :/

Bob88GTA

iTrader: (2)

See attached doc

Coil Testing.pdf

Rockguy

Did you try taking a plug out and holding against the engine block to test for spark? Don't have your hand on the metal part of the plug. A spark tester would come in handy here.

Get yourself a fuel pressure gauge and check for proper fuel pressure as well.

Tibo

iTrader: (15)

Give this a read:
http://easyautodiagnostics.com/gm_ic...n_module_1.php

It was able to help me when I had issues a few years back.

gta_knight

Thanks thats a great article.

I have tested for spark but got mixed results, my friend helped me out with this and we first tried it with the plug out of the engine and it was sparking, then with the engine running and it still running crap he pulled no.1 and no. 3 leads off out of curiosity and the engine didnt change........... surely if it was sparking it would of ran worse which was confusing to say the least.

I did read on another thread the plugs can spark ok out of the engine but when in the engine under compression they crap out, however ive fitted a brand new set of plugs last week and its still the same so its something else.

Im getting goof fuel pressure as i fitted a gauge and a AFPR, i get 45psi

Ive got a whole other thread about the entire problem in the TPI section btw, but checking the ignition module is next on the list i think, even though its only a couple of years old, and when my old one gave up the car would still always start and was stalling at junctions etc

RJMcEachern

take the ignition module to any big box auto parts chain, have them run the test on it multiple times, this heats the unit up and might show good while cold or warm but when hot fails, I have seen this lots of times.

RJMcEachern

bop11

The test you did is not for ignition but for dead cylinders. Why do you think it is spark? If you pull a plug wire with the engine running and there is no change, either you have no/low compression, or a burnt valve. Did you do a compression test? You might have a cracked distributor cover but it sounds like you got some serious engine work to do. Forget wasting time on the ignition after replacing the distributor cover.