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Old 11-30-2002, 03:33 PM
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Join Date: Nov 2002
Posts: 10
Question Ignition Problem On '91 300TE Wagon

The other day our 300TE Wagon started and ran fine for my wife on the way to work. After work, it would not start. It would turn over fine (not the battery) but would not start. Recently I replaced the ignition coil to resolve a ruff running problem, so I doubt it is the coil. Our '86 420 had to have the "Ignition Module" replaced a couple of years ago do to not starting and I am wondering if this is the same problem and how I can test it as it is expensive to replace. Can I put the Module from the 420 on the 300?? I browsed the parts list on for the "Ignition Module" for the 300TE but did not see it on the parts list. Does it have one and if so, what is it called technically?? Please advise. Thank You
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Old 12-01-2002, 06:56 AM
Senior Member
Join Date: Sep 2002
Location: New Jersey, U.S.A.
Posts: 2,398
Hi Andrew Before you start spending money you should try to narrow the problem down a bit. Does it have spark? Is the fuel pump(s) running? How's the distributor cap and rotor? Don't assume the worst. And I wouldn't recommend swapping the 420 module for test purposes. The ignition system is known as EZL. Let me know how it goes.
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Old 12-23-2002, 11:06 PM
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Join Date: Nov 2002
Posts: 10
Just to let whoever may be interested, the problem ended up being the "crank sensor". This took some time to figure out as the car would start in warmer weather but not when the temperature was below around 30.
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Old 12-24-2002, 12:08 AM
haasman's Avatar
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Join Date: Jun 2001
Location: San Francisco, CA
Posts: 3,096

How did you determine it was the crank sensor?

'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)
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