cold start system
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Super Member
Joined: Apr 2016
Posts: 889
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From: Southern Illinois
, 2023 BMW X4, 1991 190E
cold start system
Is there a special injector or system hooked to an injector, that is used just when you start the car up. This is on a 1991 2.3 My car aways is hesitant to start the first time but always run after the second start.
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From: SF Bay Area, CA
190E 2.6L 1989, 190E 2.6L 1988, BMW 535dXdrive 2014, BMW 428i 2015
Yes there is a cold start valve that injects fuel into the intake port for 1-2 seconds as you crank on a cold start. Inoperative cold start will make it pretty hard to start the engine.
With it operating the engine should start immediately in a fraction of a second in mild temps. Below freezing may take a tiny bit longer.
With it operating the engine should start immediately in a fraction of a second in mild temps. Below freezing may take a tiny bit longer.
Last edited by dolucasi; Oct 9, 2022 at 01:56 AM. Reason: typo
MBWorld Fanatic!
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1991 190E 2.3
I agree that the cold start valve is the likely culprit. I would suggest you try to resolve this as soon as you can. Grinding on your starter in order to start the car won't do your starter any favors.either and it can lead to premature wear on the starter as well.
Junior Member
Joined: Dec 2006
Posts: 41
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From: London
300sel- w109 .1971
Cold start injector
May be clogged up.
Check voltage at injector connecter for a couple of seconds , engine in cold condition
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Joined: Nov 2024
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Cold start injectors are an easy replacement and act like another fuel injector. Many Bosch FI systems used them. They should be replaced when the regular fuel injectors are being replaced. However, there could be other culprits causing a hard cold start:
Fuel pressure accumulator
Fuel pump
Bad coil & ignition wires
Fuel pressure accumulator
Fuel pump
Bad coil & ignition wires
