94 850 Turbo No-spark but turning over

rippertele · Post by **rippertele** » 31 Mar 2008, 18:30

Where should I go next? I've replaced the Cam Sensor and nothing changed. I was doing 65 mph of the HWY and the engine just died! My wires, distributor, and rotor apear to be fine. I have voltage running to my coil and from the coil to the distributor but still no spark. Could it be the ecm? Relay? I have pressure in the fuel rail and I hear the pump priming......HELP!

Post by **Ozark Lee** » 31 Mar 2008, 18:39

I have voltage running to my coil and from the coil to the distributor but still no spark.

Explain that a bit more. When you say you have voltage from the coil to the distributor - How much voltage and does it pulsate?

You should be able to (it might shock the crap out of you but it is non lethal) hold the coil wire near the block, 1/8" or so, and it should jump a big arc as you crank the motor.

If you have battery voltage there your coil shorted out.

...Lee

Post by **lewismug** » 31 Mar 2008, 19:29

The first thought I had was the timing belt.

rippertele · Post by **rippertele** » 31 Mar 2008, 20:18

I just used a volt meter and placed the ground on the engine block and the positive to the red cable on the coil. Then I went from the inside of the cap from the coil and found current too. I found the meter registered but I didn't note the actual voltage. I was just looking for current.

Well, I found NO arc when I did what you suggested but maybe the battery does not have a full charge on it as I've attempted to crank it now for days.

rippertele · Post by **rippertele** » 01 Apr 2008, 10:22

Well, the cam was spinning when I had the sensor off so I think that tells me the belt is on, right?

Post by **Ozark Lee** » 01 Apr 2008, 10:42

Well, the cam was spinning when I had the sensor off so I think that tells me the belt is on, right?

Yes. If it wasn't, the other noises (the pistons crashing into the valves) would have alerted you.

You can use an ohmmeter to check the coil. Check between the primary terminals (terminal 15 and terminal 1). You should get very low resistance, the spec is 0.5 Ohm to 1.5 Ohm.

Next check between terminal 15 and the High Tension lead. It should measure 8,000 to 9,000 Ohms.

...Lee

Journeyman · Post by **Journeyman** » 01 Apr 2008, 15:31

Did you check for codes? I'm assuming the cam sensor replacement was a reaction to a code, but were there any others? Did the car die before or after the cam sensor replacement?

Volgrrr · Post by **Volgrrr** » 01 Apr 2008, 15:43

lewismug wrote:The first thought I had was the timing belt.

I'm sure if this were the case rippertele would have heard some rather expensive noises when the engine died - i.e. you can't confuse the sound of an engine bashing itself to pieces.