my 95 geo wont start

95 geo metro 3 cylinders,1.0 liter wont spark i've changed plugs,wires,distributor,cap and rotor,ignition coil,ignition module,checked relays and fuses ,compression,fuel pump,starter,battery,checked ground wires,alt, ecu changed got no check engine light coming on changed bulb, still no check engine light coming on, can someone give afvice on what it could be. its timed

Category:

Autos & Vehicles

Tags:

• no spark
• got fuel
• car
• ecu
• geo
• metro
• 3 cylinders
• help

[epicfailureinc]

The reason I am asking is I have the same issue.

[omarhomie1986]

@epicfailureinc it was the fuel pump i figured it out

[smachappy]

Is it running yet? I have a '94 and it's doing the same thing.

[omarhomie1986]

no I changed the pick up coil in dist someone just said to change the alternator but im gonna check it out

[robbsam81]

Blown head gasket

[iHeartDawnKeyes]

From the sounds of it, this man's friend used a multimeter and found that he was getting weak spark due to low voltage coming through the ignition coil. The ignition coil's job is to convert the battery's 12 volts into a much higher voltage current (20,000+) to obtain the voltage needed to start the car. If we don't have enough voltage coming out of the ignition coil, THERE IS NO NEED TO REPLACE ANYTHING ELSE! Stop there and find out what is causing you to get low voltage from the coil.

[iHeartDawnKeyes]

First I would use a multimeter and make sure that we aren't experiencing any kind of a voltage drop between the battery terminal and the wire feeding the ignition coil. My guess is that there is going to be a voltage drop somewhere between the two. Somewhere in this circuit there is going to be a voltage drop and you should use your multimeter to trace it down. It's likely going to end up being a bad ground in this case.

[iHeartDawnKeyes]

Now as for this vehicle specifically, Geo Metro's have a common issue with the grounds on the intake becoming corroded. I would start there. Many electrical components, including some in the ignition circuit, ground to the back of the intake manifold. There will be a few wires that ground on the bottom passenger side of the intake manifold, right above the starter. Remove the bolts, sand and clean the area where they connect on the intake, sand the bolt and sand the wire's terminal.

[iHeartDawnKeyes]

After this, try and start. This commonly solves issues with weak or no spark for Geo Metro owners. While you are at it, you wouldn't be doing too bad to disconnect and clean corrosion from just about any ground in the circuit you see including the main ground to the transmission. The only other thing that I could think of right off the top of my head is the crankshaft position sensor. This would only be a concern if we are getting NO spark though, and it sounded like we are getting some.

[iHeartDawnKeyes]

The crankshaft position sensor monitors the position of the crank and is used by the computer to control timing. If it's not functioning, you will not create spark. I'm not a mechanic, but just a minor league Metro enthusiast. Therefore, I don't know everything there is to know, but I do know that this is the path of diagnosis we should be following. We DO NOT just replace random parts. You might even cause more problems by doing that.

[cheezy6400]

So did anyone get there geo running

[biancafrost18]

mine is the same. figured out its the crank position sensor.. maybe thats whats wrong with yours to