924Board.org

[87924s]

hey guys been looking through your forum, decided to joinsince i finally got me a car to talk about. well here it goes, i got an 87 924s and i am still getting no spark after i cahged the dme relay and the coil. i checked and i am getting 12 volts to the coil. i also ruled out the timing belt. any help would be appreciated.

[gohim]

Welcome

Do you have the service manual?

Have you checked for spark at the spark plugs?

Have you checked the flywheel sensors?

[87924s]

i have not checked the flywheel sensors. is there a way to ohm them out.

[gohim]

Yes, you can ohm them out. You will find the sensors at the rear of the block, with the connectors supported by brackets. Bad connections, brittle wiring, and broken connectors are commonly encountered problems as these cars get older.

But if you don't know that, you don't have a service manual. I recommend the Factory service manual, but it is expensive. Start with the Haynes manual, but know that it is full of typos and errors.

In the meantime... Don't tear into the car without knowing what you are doing. Do a search of the archives and read the Tech Section hear before asking questions that have been asked and answered many times before.

Everyone has suffered to urge to drive ahead to get a newly acquired car on the road. But before you can so safely, you need to take care of your ABCs. Check the brakes, cooling system, and in the case of the 944 and 924S, the health of the timing and balance shaft belts. If you got the service records with your new car great. Make sure that the "front of engine" service (timing and blance shaft belts, water pump, pulleys, rollers, and front of engine oil seals) has been performed within the past three years or 30K miles. If not, you are going to want to take care of this service (these items) before you consider driving the car (the 924S/944 engine is an interference engine, and if the balance shaft or timing belt break or skip, then the valves meet the pistons with expensive results). Very often, on newly acquired cars with running problems, getting the maintenance work up to date cures problems that you were going to have to go looking for. And in many cases cars that have suffered from obvious problems have seriously neglected service needs, as the P.O. (Previous Owner) put off making repairs, and doing scheduled service because he/she lacked the funds to maintain the car or was planning of getting rid of the care and passing the headaches to the next owner.

You will find the members here more helpful if you have a good/better understanding of how your engine and ignition system work before you ask questions. If you understand how the car isd supposed to work, figuring out why it may not work (being able to recognize problems)becomes much simpler.

[Llamaguy]

If the car sat for any period of time, 3+ weeks, I would change the plugs to start with, that's what happens to mine when I didn't drive her last winter.
_________________
1987 924S Guards Red
1997 Suzuki Tl1000 Supersport

[87924s]

thanks for all the advice i will get the car over to my friends shop and put it on the rack. i'll let you guys know the results.

[gohim]

The only thing you would need to lift the car to check is the brakes and the wheel bearings.

These are very easily serviced yourself, and good DIY projects with very little needed besides handtools, a good eye, and a set of dial calipers to measure the rotor thickness.

Actually, you don't even need the dial caliper if you don't have one, you can judge the thickness of the wear ridge on ot outside edge of the rotors (anymore than a thumb nail ridge high on edge of the rotor, on either side of a rotor, and it's wornout.

Brake caliper seal kits are about $15 each, and if you see a torn boot or a leak on any brake caliper, you need to rebuild both calipers on that end of the car.

The wheel bearing are the same ones used on earlier 911s and you need to inspect and adjust them. If they get loose at all, then the small outer bearing will fail. Use a good quality synthetic wheel bearing grease, you need about one tube or tube to do the front bearings.

The flywheel sensors are accessable from the engine compartment, not under the car.

[87924s]

thanks for letting me know. i am just use to working on american cars. i bought this car for one because i tink it would be a sweet car once it is running, and also i wanted to learn something new.

[Browar]

I would also check DME unit. Mine had bad internal connection and it wouldnt send signal through pin number 1(to coil) = no spark, but coil checks OK. If You are cranking engine tap few times Your DME (gentlly). If it try or fires = DME. I found it on previous posts - bingo!

[87924s]

i will try that tomorrow. also if it would be that does anyone on the board have a used one? i heard they can be costly if bought new.