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Another "Wont start" issue
Topic Started: Jun 3 2010, 05:21 PM (1,171 Views)
SoloCon
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I am in the middle of wiring my 93 1.0L Geo, but have came to a complete hault. We cant get it to turn over. This is my setup.

93 Geo engine that was hooked up to a auto tranny. We swapped the tranny for a 97 5 speed tranny. The ECU is coming from a 93 Geo with stick. We are using a custom fuel pump. (NOT the one from the Geo)

Anyhow, we are NOT getting any spark. The fuel is NOT getting into the TBI (is that what you call it? area with the injector) either. The ECU is getting power. When we go to start the car, it cranks, but does not roll over/start.

We can tell fuel is getting past the fuel pump but not into the area with the injector.

Any ideas?
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starscream5000
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Got 70 MPG?

Spray carb cleaner into the throttle body while cranking, see if it will start that way. You may also need to check your fuses, grounds, and wiring for any shorts, especially on the fuel pump itself since it is a custom job you have done...
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mcmancuso
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If the ECU does not detect that the engine is running (via the distributor sensor thing) It will cut off the injector and ignition. make sure that is properly connected and sending a signal.
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slander
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Tech Certified

Turn the key to "on" but do not crank the engine. You should hear your fuel pump run, build pressure, and shut off. If not, check the ground on the back of the intake manifold just above the starter.
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SoloCon
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The fuel pump is NOT connected via the engines wiring harness at this point. Its connected to the battery direct. (This is just a temp wiring solution tell we figure everything out) Could this be a issue?

ECU is connected and powering.

Fuses (all of them that are connected to the main wiring harness) are good and in working. order.
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mcmancuso
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The ECU will cut off fuel by turning off the injector not the fuel pump (correct me if I'm wrong), and I'm not sure about the internal circuit on the ECU but it may be looking for current on the line that normally goes to the pump.
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mcmancuso
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is the injector getting a signal?
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crankcase


Just to be shure:



You started out have a 1993 1.0 with auto trans you are trying to get going.

You pulled the original auto trans and put in a 1997 5-speed manual.

You pulled the original ECU from the 1993 with auto trans., and replaced it with another ECU from a 1993 that had a 5-speed manual.

You also put in a custom fuel pump wired directly to the battery.



Could the custom fuel pump have been damaged by being wired up for constatnt power?
My basic check for fuel delivery is to disconect the fuel hose at the throttle body and watch the flow into a can. If you try this, beware of sparks!!!
It sounds like you may have 2 problems because the no spark should not be related to a fuel pump that is hard wired.
Edited by crankcase, Jun 3 2010, 10:10 PM.
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SoloCon
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mcmancuso
Jun 3 2010, 09:55 PM
is the injector getting a signal?
It is, but dont know what it "should" be getting.
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mwebb
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FOG

SoloCon
Jun 4 2010, 04:36 PM
mcmancuso
Jun 3 2010, 09:55 PM
is the injector getting a signal?
It is, but dont know what it "should" be getting.
i can remedy that ...

Posted Image

and http://geometroforum.com/topic/2810401/1/#new
Edited by mwebb, Jun 4 2010, 09:14 PM.
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SoloCon
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OK, so now we are getting fuel (bad fuse/ground). We are still not getting any spark. We are getting power to/from the coil but still no spark
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SoloCon
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Also, anyone know what this 3 prong blk/brown/brown and white (looks like some kind of diod) thing is to?

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SoloCon
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anyone welling to PM me a number to call them for some info?
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mwebb
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FOG

SoloCon
Jun 3 2010, 05:21 PM
I am in the middle of wiring my 93 1.0L Geo, but have came to a complete hault. We cant get it to turn over. This is my setup.

93 Geo engine that was hooked up to a auto tranny. We swapped the tranny for a 97 5 speed tranny. The ECU is coming from a 93 Geo with stick. We are using a custom fuel pump. (NOT the one from the Geo)

Anyhow, we are NOT getting any spark. The fuel is NOT getting into the TBI (is that what you call it? area with the injector) either. The ECU is getting power. When we go to start the car, it cranks, but does not roll over/start.

We can tell fuel is getting past the fuel pump but not into the area with the injector.

Any ideas?
mrmisfire@gmail.com

you have injector pulse , there fore your CMP is connected to the ECM and the ECM does recognize the signal
i dunno if the primary spark system on a 1993 metro is self contained in the distributor and grounds and un grounds Ignition coil negative to create primary spark

or

if the signal goes out to the ECM then the ECM sends a signal to the Ignitor / spark amplifier which then grounds and un grounds Ignition coil negative to create primary spark

you need to have a look at the wiring diagram for the system you have to ascertain this.
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