no spark please help

[al3xbmw]

Alright so i decided to get an e30 and im having issues to get it started. It started before i just replaced the fuel filter, fuel pump, spark plugs dme relay, fuel injection relay. i crank the car to start and the fuel pump works im just not getting spark. is there another relay i should change or are my knock sensor bad. Please help i want to get the car on the road already.

[jlevie]

Are you sure you got the right main relay? It should have 5 prongs.

Is power present at the coil positive when the ignition is switched on and does the CEL light up? Do you have spark with the old main relay in place?

[al3xbmw]

yes it has five prongs and its with the next to only two other relays. theres was no spark at the coil or the spark plugs could it be the crank shaft sensor i dont wanna give up on the car yet

[al3xbmw]

theres also a small ticking sounds when i turn the key to position 2 by the relays im not sure if its that or by the a/c

[jlevie]

Since the engine ran before you changed the relays, they are the obvious suspects at this point. Put the old relays back in and check for spark.

[al3xbmw]

That's the thing if I out new ones wouldn't it have to start. Besides there's only tree important relay that will
make the car not start correct? The
Main relay, fuel injection relay, and o2 sensor relay

[jlevie]

Only the main and fuel pump relay are important w/respect to starting the engine. The O2 heater relay is only used to bring the O2 sensor up to operating temperature quickly and is more related to emissions control.

That's the thing if I out new ones wouldn't it have to start

That makes no sense what so ever.

[al3xbmw]

Sorry it's supposed to say if I put new ones in shouldnt it turn on right away

[jlevie]

If the new relays are the correct types and in the correct sockets, then yes.

[al3xbmw]

ok so the new relays are in theres power to them fuel pump runs theres fuel getting pushed through the lines as well so what now. im not getting any spark to the coil what to do next.

[squidmaster]

the relay you bought, does it have TWO 87a prongs? there should be a diagram printed onto the box.

[al3xbmw]

I need to double check

[Bmr]

Check battery and check ground connection on side of engine.