It then stays on after start up for 5 seconds or so. I have tested the leads off the gp relay going to the plugs and they all ohm pretty much zero and they are brand new. I replaced the gp relay with no change.

Where do I go from here? It is on a 93 300D 2.5turbo.

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-disav

99 E300 TURBODIESEL Astral Silver 282K - AMG brakes, suspension, monoblocks, speedo & interior - Full Load Maxed on IP by custom Speed Tuning USA Chip - T3/T4 Garrett - EGR/MAF delete
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95 E300 DIESEL Green Queen 267K SOLD
84 300D 216k SOLD
87 300D 299K #22 head - intercooler - full load adj. - 8sec 0-60mph - SOLD
76 300D 214K SOLD