Hard start when cold - Car Troubleshooting


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

Hard start when cold

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Car Troubleshooting

jesip1207
New User

Jun 8, 2014, 3:00 PM

Post #1 of 3 (1702 views)

Hard start when cold	Sign In

When trying to start vehicle in the mornings, after sitting for several hours, the vehicle will turn over like it is trying to start but takes many times to get it started. Once it is started, and it is warm, it will run fine for the day. Check engine light is not on and no other warning lights are flashing. The vehicle has 169,000 miles on it. It is a 1989 Mercedes Benz CE. It is a 6 cylinder.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jun 8, 2014, 8:14 PM

Post #2 of 3 (1669 views)

Re: Hard start when cold	Sign In

I see nobody has been by yet for ideas so I'll give this a shot. Benz and some others can be their own bird so personally never dug too far into them just because of expense of info and tools when most just went to dealer service for them with abundant info and parts (OE) at the ready fast or faster.

OK - By your description it isn't delivering more fuel for cold starts like a choke would even fuel injected has ways to do that same function and shut down gradually as it warms up when not needed.

A quick look shows this does use a coolant temp sensor (not the same as one for a gauge on dash) that would tell it that it's cold and HOW cold.

Could be wrong but should look like this..........

Can only be 'general' for this car so suggest just make sure it's plugged in (should be near thermostat area) and wires look good. Be careful especially with these cars not to damage plug connections just checking anything especially at some age.

The concept is this changes ohms at given temps and engine management controls take that info on how much fuel to deliver even pre OBDII vehicle. Benz could do this or route this all differently than the masses of other vehicles.

Might do you well to just get a diagnosis and decide if you want to take it on or not,

T

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Jun 9, 2014, 2:58 AM

Post #3 of 3 (1657 views)

Re: Hard start when cold	Sign In

Another suggestion is to connect up a fuel pressure gauge and watch what fuel pressure is doing when you have the hard start. Also see if the fuel pressure bleed down rate is excessive.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Search for (options) Privacy Sitemap