Question about 1989 Mercedes-Benz 300-Class

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Runs bad in hot days, good in cold days. 89 benz

Check engine light comes on, then there it go,s. on cool day it will run good for a long time-until hot. it is a 300e.

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It could possibly be your temperature sensor. I had a Buick with the same problem. In winter, it ran fine. When the weather warmed up, the car would sputter and die. A defective temp. sensor will cause your car's ECM to mis-read the coolant's temp. So it will adjust your fuel input as if the outside temp. was -30,causing an over-rich fuel mixture.

Posted on Mar 07, 2009

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Instructions on how to use holts wondarwald


Holts Wondarweld
Flush engine.
EXTERNAL CRACKS
1 Run engine until hot,drain off enough coolant to remove thermostat.
2 Remove thermostat.
3 Mix contents of can thoughoughly! and pour contents into thermostat opening.
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5 Run engine at a fast idle for 15 mins,dont allow to boil.Top up if necessary.
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2 Run engine until hot.
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