Difficulty starting, stalling while idling

Jun 27, 2004 | 07:36 PM

brettscafe

Thread Starter

Newbie

Joined: Dec 2003

Posts: 4

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Difficulty starting, stalling while idling

I have a 1988 300E that requires multiple attempts (8 attempts yesterday) to start. It making the "rrrrrrrrr" sound that normal cars make when starting, but instead of starting up gives a "puff of air" sound. The other problem: idling at red lights. Restarts fairly right away and then stalls again. Sometimes at the stop light, the car needs to be restarted 4-5 times. The mechanic has done the following, but the problem is getting worse: 1)new plugs, 2)new caps,distributor, rotor, 3)tune up,4) flushed fuel injectors, 5) oil change, 6)new idle valve, 7)new fuel pump relay, 8) new ignition coil. The fuel filter was changed 2 years ago. Does anyone have any suggestions on what might be the problem. brettscafe@yahoo.com

Jun 28, 2004 | 09:52 AM

CaliE320

Super Member

Joined: Jun 2004

Posts: 514

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From: So CAli/L.A

88 260 E

Get a new OVP

Jun 28, 2004 | 10:16 AM

shanta

Member

Joined: Nov 2002

Posts: 123

Likes: 0

check the fuel pumps also

Jul 9, 2004 | 03:46 PM

doodski

Newbie

Joined: May 2003

Posts: 20

Likes: 0

86 300E manual

I have the same problem. somebody should post it after they fix theirs. i know its a common problem for w124. but its expensive to change parts that doesnt need to be changed. i hope we fix this problem.

Jul 9, 2004 | 07:23 PM

94E320

Newbie

Joined: Jun 2004

Posts: 10

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From: Weatherford, TX

94 E320 4 Sedan

Okay stupid question, but I am new here and to Mercedes, what is a OVP?

Thanks in advance

Kevin

Jul 10, 2004 | 05:29 PM

Jer

Super Member

Joined: Jun 2003

Posts: 595

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From: Middlefield, CT

1994 E320

OVP is 'Over-Voltage Protection' relay. It cuts power to electronic control units (KE, ABS/ASR) on a higher-than-normal voltage condition.

Jul 11, 2004 | 12:44 AM

doodski

Newbie

Joined: May 2003

Posts: 20

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86 300E manual

OVP is located behind the battery, its the relay w/ a fuse on top.

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Jul 20, 2004 | 11:57 PM

Bobenis

Member

Joined: Jun 2004

Posts: 159

Likes: 6

From: BC, Canada

2007 ML350 (M272) 30-509034 & 2008 ML320 CDI

I have something in my book here that says after the car works in over time, the hesitation and stalling on cold start up occurs. To remedy this, adjust the fuel distributor lower chamber pressure to 0.45 bar (6.5 psi) instead of 0.4 bar (5.8 psi) and these symptoms disappear. You will need a CSI fule pressure gauge to measure and adjust this fuel pressure.

I have yet to try this as I do not have a gauge..lol but mine is doing the exact same thing but not stalling. Slo/hesitation off the line and poor startin/stalling on cold start ups. If you do try it, let us know how it turns out! Cheers!