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Old 05-06-2002, 11:12 PM
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Unhappy 85' 190e runs rough when cold

Can any one help? I have 85' 190e 2.3 and it runs rough when cold .
specifically hard to start 4-5 cranks. then it idles fine but to try and throttle off idle it spits and sputters until its hot then runs well.
I suspect either cold start valve, auxiliary air device, or the electromagnetic pressure actuator. Can anyone give me ohm readings for these parts so I don't spen a fortune replacing things I don't need. Any other help would be greatly appreciated.
Thanks, Sean
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Old 05-07-2002, 08:43 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
The fuel system computer must power up the EHA (fuel control regulator) so that the engine can run rich when cold.
Sounds like the over-voltage relay isn't powering up the computer. This is a common problem.
Also many times the wires at the EHA break & no power can get there to richen the mixture.
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Old 05-07-2002, 11:33 AM
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just one piece of experience - my 190e 2.3 (85) was running rough when cold - replaced plugs, cap/rotor, wires, injectors, air/fuel filter, OVP relay, etc. - nothing helped. replaced the oxygen sensor, runs absolutely fine now, even on cold engine. Maybe something else in your case though!
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