Car cranking, but not starting(Now with spark!)

[ST1G]

He meant the tooth wheel where the CPS is getting its signal from.

I see. Well the wheel look like it's functioning how it should. My sensor is mounted just like this one, except it had a 10mm bolt holding it not a 5mm allen.



The CPS I had in there was very dirty, I cleaned it and still had no luck with spark. I put in the one from the yard (from car with broken tbelt) and that's the one I did the above testes with. I'm very suspicious of the CPS. I should probably pony up and buy a new one.

Have you checked the harness for continuity

See post 66

[HennaE30]

I see. Well the wheel look like it's functioning how it should. My sensor is mounted just like this one, except it had a 10mm bolt holding it not a 5mm allen.







The CPS I had in there was very dirty, I cleaned it and still had no luck with spark. I put in the one from the yard (from car with broken tbelt) and that's the one I did the above testes with. I'm very suspicious of the CPS. I should probably pony up and buy a new one.







See post 66

Ah my bad... Missed that one

[solo318]

Measure the voltage at the coil while you are cranking the engine. Then use your fluke to measure engine rpms while cranking.

[ST1G]

Measure the voltage at the coil while you are cranking the engine. Then use your fluke to measure engine rpms while cranking.

How do I measure the engine rpms with the multi meter?

[ThatOneEuroE30]

Measure the voltage at the coil while you are cranking the engine. Then use your fluke to measure engine rpms while cranking.

How do I measure the engine rpms with the multi meter?

Yea how do you do that? I'd pony up and buy a new CPS so you can be 100% it's not that.

[EyExR]

I know you mentioned this started as an intermittent problem but I would check the fusible link as well. Is your ECU getting power?

From what I've read it definitely points to either a bad ground, main relay, DME, CPS or bad harness.

Good luck

[ST1G]

I'd pony up and buy a new CPS so you can be 100% it's not that.

Yeah, that's what I gotta do I think. I'm going to go talk to the parts guy at at Import Parts Specialist, he is a wizard when it comes to e30s and owns a few. I guess if it doesn't fix it I could return it too.

I know you mentioned this started as an intermittent problem but I would check the fusible link as well. Is your ECU getting power?

From what I've read it definitely points to either a bad ground, main relay, DME, CPS or bad harness.

Good luck

Again, post 66 eliminates a bad ground, main relay, DME, harness. I also stated in post 56 and 41 that my DME worked in a friends car, and his didn't work in mine, thus eliminating the DME.

[ThatOneEuroE30]

Yea do that for sure

[ST1G]

I snagged a new CPS tonight. It was $50 so I pulled the trigger. I plugged it in and checked pins 46 & 47 on the DME harness and now I have 50 more Ohms. So that's a good sign :D I'm going to get it all the way installed and gapped right and see what happens. I hope this is it.

[ThatOneEuroE30]

I snagged a new CPS tonight. It was $50 so I pulled the trigger. I plugged it in and checked pins 46 & 47 on the DME harness and now I have 50 more Ohms. So that's a good sign :D I'm going to get it all the way installed and gapped right and see what happens. I hope this is it.

Let's hope! Possible to have it started by the end of the night

[HennaE30]

I snagged a new CPS tonight. It was $50 so I pulled the trigger. I plugged it in and checked pins 46 & 47 on the DME harness and now I have 50 more Ohms. So that's a good sign :D I'm going to get it all the way installed and gapped right and see what happens. I hope this is it.

Good luck! Hoping for you that it works out.

[ST1G]

Guess what guise. NO SPARK.

So, I put in the new CPS, got it in there, got her all situated. No spark.

Then I get to testing. I decide to put the multi meter on the coil positive (pin 15), and ground (body) and I'm getting 192Ω I get the same 192Ω when I put the meter between the negative terminal (pin 1) and ground (body) This was with the ignition on. This still doesn't make sense to me, since if the positive is grounded then the coil wouldn't get the signal to send spark.

After a few attempts to get the car to spark with nothing I checked the coil again and now I get a millisecond of continuity between pin 15 on the coil and ground and then it goes to infinite resistance (open). Same with the negative.

I then tried the coil from my running car. Same thing with the moment of continuity. No spark.


I don't even know any more.

[ThatOneEuroE30]

This is getting fucking confusing. I'd be like

[ST1G]

This is getting fucking confusing. I'd be like

Seriously . That's how I feel. The only thing I've ever tried to do that's more complicated than this is mega squirt.

[ThatOneEuroE30]

Car cranking, but not starting

Seriously . That's how I feel. The only thing I've ever tried to do that's more complicated than this is mega squirt.

Just yank the pos and throw in a m50 do a budget swap.