No Spark!

remark90 · Post by **remark90** » 20 Nov 2011, 12:14

So my original engine got overheated because of no water, replaced it with n engine out of a 99 V70, got everything all back together but I can’t get any spark and I am asking for suggestions.
When cars original engine died I was cruising at about 65 mph and with no warning shut off, got car pulled off road and that is when I noticed the heater hose came out and no water left in engine. Now, what could have happened to the car to prevent me from getting spark to replacement engine?

Kent.

Milanomike · Post by **Milanomike** » 20 Nov 2011, 14:06

I'm guessing something is not hooked up or a ground. If you have no spark do you have 12 volts at the coil, when ignition is on? I'd start working back that way. Mike

Post by **jblackburn** » 20 Nov 2011, 14:11

First, test voltages at the ignition coil wires. If you don't have 10+V there between the wires, look back to the cam and crank position sensors for proper signal.

The crankshaft sensor is located just above the transmission housing; the camshaft position sensor is in a housing just behind the distributor cap on the engine block. You should see >200 ohms and <500 ohms on the crankshaft position sensor, and often times the cam sensor will set a code. Pin 1 to 3 of the camshaft sensor should read 12.5 V, 1 to 2 should read <5 V, and pin 1 should ohm out 0 resistance to ground.

remark90 · Post by **remark90** » 20 Nov 2011, 14:31

I do have 12v at both wires going to coil with ignition on and while cranking, I also back probed the cam sensor at the blue w/ yellow wire and have 5v and 0v depending on position. I know this is a simple problem but cant seem to get spark. Is there a way to test coil?

remark90 · Post by **remark90** » 21 Nov 2011, 06:48

Any other thoughts?
I also noticed that while cranking the needle on the tach dos not move or bounce, could my crank sensor be the culprit?

Post by **jblackburn** » 21 Nov 2011, 06:59

Could be - the crankshaft position sensor is responsible for telling the ignition coil when to fire. I'd try testing the resistance and see what you get. Make sure it's bolted down snugly and the wiring is securely fastened to it.

remark90 · Post by **remark90** » 21 Nov 2011, 08:39

Does anyone know how and what readings I should get from the crank sensor?

Post by **jblackburn** » 21 Nov 2011, 08:45

It's above. 200-500 ohms depending on the position of the flywheel.

remark90 · Post by **remark90** » 21 Nov 2011, 09:05

jblackburn, I guess I'm being thick here, what do you mean by "it's above"?

Post by **jblackburn** » 21 Nov 2011, 09:07

jblackburn wrote:The crankshaft sensor is located just above the transmission housing; the camshaft position sensor is in a housing just behind the distributor cap on the engine block. You should see >200 ohms and <500 ohms on the crankshaft position sensor, and often times the cam sensor will set a code. Pin 1 to 3 of the camshaft sensor should read 12.5 V, 1 to 2 should read <5 V, and pin 1 should ohm out 0 resistance to ground.