M102 doesn't start when humid or after a rain
The engine turns but wouldn't fire. If it ever does, it will die out within a minute or when the car is put in gear.
The car runs perfectly in all other circumstances, even when warm. Items replaced: OVP Ignition coil Ignition wires Spark plugs Distributor and cap Checked fuel at the fuel distributor test terminal and it's flowing. :confused::confused: |
Have you verified spark in these conditions? Might be something else like fuel pump relay or other electrical in the vehicle acting up.
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Yes @pawoSD, I did swap the fuel relay. I happen to have three units that I collected while on junkyard runs. No improvements!
EZL was bone dry as well. |
wiring?
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Do a smoke test to check for vacuum leaks.
What do the plugs look like? |
@oldsinner111: ignition cables are new. I checked the harness, no cracks (unlike the junk in W140 and w124 from the 90s).
@christuna: I did a pressure test on the intake. Nominal! By the way, the CIS altitude sensor is fairly new (behind the batter). I replaced that one while chasing a dying issue of the car that was losing power while driving in the rain. That resolved it. This was a few years ago. |
m:
For the sake of information, what version of M102 is involved, and in what chassis? |
@Frank Reiner, it's a 2.3 L in a W201 (1988).
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Could it be a build up of condensation in the intake, and if so, how to mitigate?
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