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jaxrepo · Joined: 04 Jan 2004 Posts: 162 Location: Jacksonville, FL

Help - 1987 924S - is pumping fuel, getting spark to coil, but no juice to distributor. Also where is the reference mark sensor located? Any ideas will be greatly appreciated. Many thanks .... Dick Price.
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78 924 Parts car
84 944
88 924S Parts car

Web site at www.jaxrepo.com - 944/924 parts.

Paul · Posted: Mon Jun 21, 2004 2:37 am Post subject:

Under the brake booster you will find 2 sensors.

If the coil has spark, they are probably OK.

Are you sure the rotor is turning?

jaxrepo · Joined: 04 Jan 2004 Posts: 162 Location: Jacksonville, FL

Hi Paul: The rotor is turning. The coil is getting spark. The coil is not discharging power to the distributor. Dick.
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83/86 944 Parts cars (2)
78 924 Parts car
84 944
88 924S Parts car

Web site at www.jaxrepo.com - 944/924 parts.

Paul · Posted: Mon Jun 21, 2004 4:38 am Post subject:

Are you saying the coil is getting 12 volts, but it is not producing spark?

Sleykin · Posted: Mon Jun 21, 2004 4:45 am Post subject:

Are you getting spark out of the coil when you crank the motor or do you mean you have 12V to the coil? IIRC the DME supplies a ground to the coil to complete the circuit. If you see pulses on the ground side of the coil and it isn't throwing a spark you probably have a bad coil .
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Glenn Neff
Medford, OR
87' 924S

Paul · Posted: Mon Jun 21, 2004 4:48 am Post subject:

As always the first thing to check is the ENGINE GROUNDS especially the ones under the heater valve.

Is your tach bouncing when you crank the motor? If so the sensors are probably OK.

Lizard · Posted: Mon Jun 21, 2004 5:10 am Post subject:

what about the crank position sensors on the bellhousing that read off the flywheel? and you shouldnt be getting a full 12 to the coil when in the on position.
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3 928s,

Paul · Posted: Mon Jun 21, 2004 5:30 am Post subject:

Other things that are easy to do:

Pop in a spare DME relay.

Remove and reconnect the DME plug under the dash or wiggle it while you are cranking.

With all wires disconnected check the coil:

1 to 15 should be 0.4 to 0.6 ohms
1 to 4 should be 5.0 k to 7.2 k ohms

jaxrepo · Joined: 04 Jan 2004 Posts: 162 Location: Jacksonville, FL

Hi Guys: We are narrowing this thing down. My mechanic thinks that Lizard has the answer in his post. Will keep you posted on progress. Bought this one last week & it has potential. If anyone is interested there is a picture & description on my web site. Thanks guys, Dick Price www.jaxrepo.com.
_________________
83/86 944 Parts cars (2)
78 924 Parts car
84 944
88 924S Parts car

Web site at www.jaxrepo.com - 944/924 parts.