Cascade Crew

91camaro_rs · Posted: Wed Sep 08, 2010 8:58 am Post subject: more problems...

ok so i went to start my car this morning and it didnt start, so i checked to see if the timing got moved and while i was moving my distributor with car off, the fuel pump would prime, and can hear the injectors click or whatever that noise is and i could move it back and forth and it would keep priming, so im guessing a wire by the distributor is broken, any ideas of which wire?

91camaro_rs · Posted: Wed Sep 08, 2010 12:14 pm Post subject:

i replaced the wire going to the coil and the one going from the coil to the dizzy. still nothing, i really need a car to drive and dot have much time to diagnose this thing, if any of you guys arent busy would anyone mind giving me a hand, i can provide cash, beer. etc...

flea · Posted: Wed Sep 08, 2010 12:23 pm Post subject:

sounds like a continuation of the same problem you've been having.
Last time you said you said the ICM was fried, is that the case here too.

91camaro_rs · Posted: Wed Sep 08, 2010 12:40 pm Post subject:

i dont think so cause if it was bad i dont think te fuel pump would prime, i think its still good cause it will start every now and then, i just think the gas is gettin shut off unless you give it gas

91RSVert · Posted: Wed Sep 08, 2010 1:45 pm Post subject:

ICM has nothing to do with the fuel prime.

You also have a pickup coil inside the dizzy. Have you checked/replaced it?

Twilightoptics · Posted: Wed Sep 08, 2010 1:52 pm Post subject:

Only thing fuel related would be the lower oil pressure 2 wire sensor above the filter. If the pump is priming on and off.... I'd be looking to see if the ECM is having a power cutout also.

Can you 100% verify that things change by moving the distributor wires?

chevymad · Posted: Wed Sep 08, 2010 7:36 pm Post subject:

ECM will engage the fuel pump relay whenever it recieves an ignition signal. This happens whenever you turn the key on(happens just once), or when the rotor turns inside the distributor.

91camaro_rs · Posted: Wed Sep 08, 2010 10:44 pm Post subject:

chevymad · Posted: Wed Sep 08, 2010 10:54 pm Post subject:

When you turn the dizzy you're triggering the ignition.. which triggers the ecm to prime the fuel pump.

This sounds like your pickup and module are both working fine. If you hear hte injectors click, then the ecm and injectors are working as well.

Do you have fuel pressure? Will it start if you spray carb cleaner or starting fluid in the throttlebody?

91camaro_rs · Posted: Wed Sep 08, 2010 11:02 pm Post subject:

havent tried starting it yet but if i mess with the rotor it will prime

91camaro_rs · Posted: Wed Sep 08, 2010 11:10 pm Post subject:

its not starting

i put a spark plug on the coil wire, no spark...

things keep breakin, my plug for the oil sending unit, the clip on it broke

oh and btw, my tach started workin again Confused

fiveoformula · Posted: Wed Sep 08, 2010 11:28 pm Post subject:

No spark? check the ICM again.

91camaro_rs · Posted: Wed Sep 08, 2010 11:34 pm Post subject:

how should i go about checkin it?

this sorta happened before, and i just replaced the entire dizzy cause in order to get new ICM i have to get a whole new dizzy cause of the warranty

so if it is the ICM again.... there must be something causeing it to fail very often

Twilightoptics · Posted: Thu Sep 09, 2010 5:24 am Post subject:

ICM wont go out that fast 99% of the time.

Power to the coil? I'd be suspect of the negative lead on the coil as your tach was having problems too.

YES IF YOU TURN THE ROTOR IT WILL TRIGGER THE ECM TO THINK THE ENGINE IS RUNNING: aka turns the injectors on and has the fuel pump run.

If you read what brandon said, that part is working fine!

chevymad · Posted: Thu Sep 09, 2010 8:37 am Post subject:

Maybe just a bad coil. If you have a test light hook it to ground and the negative side of the coil. It should flash when you crank the engine. If it does and you have no spark.. then you have a bad coil.

91camaro_rs · Posted: Thu Sep 09, 2010 9:35 am Post subject:

i hate asking stupid questions but where on the coil is the negative, and ground?

chevymad · Posted: Thu Sep 09, 2010 9:52 am Post subject:

Coil has a positive and negative.. no ground. Positive is the large pink wire. Connect to the other one.. i think its white. sometimes there's a connector just a short way down the harness you can connect to. Ground is just anywhere on the motor.

From what you describe I'm pretty sure its the coil. .. Did you change the coil wire? If not it could be burned out as well. Anyway, do the test to make sure.

91camaro_rs · Posted: Thu Sep 09, 2010 10:06 am Post subject:

ok ill get a test light today, the coil was new when i bought it in april, and coil wire from coil to dizzy is new and i just replaced the plug and 4 inches of wire on the other coil plug (power plug)

if it is the coil thats weird cause it was sparking yesterday morning, im gonna go test it now

chevymad · Posted: Thu Sep 09, 2010 10:16 am Post subject:

There's always a time when things quit. And never think because its new its good. Sometimes new stuff aint even good right out of the box.

91camaro_rs · Posted: Thu Sep 09, 2010 10:24 am Post subject:

thats for darn sure