Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[cem_devecioglu]

another explanation may be ..somewhere else any leak into engine after it become hot its gone..

sorry ideas finished (bitti)  

[justme]

"Only happens on start up fine the rest of the time  "


Would it be fair to say that on a normal engine when starting from cold you would use the choke :question

It is exactly the same with an injected engine, with the exception that it is done for you electronically.

So what is being sensed on cold start  : Temp : airflow : accelerator position :

The ecu will then set your mixture to suit the conditions being sensed.

Check the connections always a good place to start, remove the plugs and ensure that they are clean, sometimes just removing and replacing literally cleans the contacts. If you have a meter it would make it even easier, another check is to ensure the wiring to the plugs are ok, they sometimes workharden and snap. Taking your time is always the best way be confident because it will not catch you out again.

I am purposely not including all the other checks that are being made by the ecu (avoids silly comments)

[Chopsdad]

Try a different brand of fuel - mine is "odd" when cold.  It starts fine but doesn't feel right.  I've just switched from BP to Shell and it's much better, even removing the inital lag when I set off.

Oh, and it won't cost anything either.  Worth a try  

[arthill]

I have a similar problem starting from cold, mechanic rekons EGR faulty only faults
showing up being EGR and fuel trim he says everything points to this even though it is a new valve fitted recently, my car is also fine once heated but MIL comes on. Any one
any experience of faulty parts from dealer???


JOHN

[nixoro]

In response to the suggestions its much appreciated

The car is currently running on shell fuel

I am thinking maybe the EGR even though I have cleaned this and changed the vac pipe from this to the throttle body.

Could a fuel filter change help.

Its weird tick over on start up not all the time is like its really lumpy blip the accelerator a couple of  times and it clears itself.

I shall be checking the EGR and the air intake and the filters at the weekend.

Shall also have a look at the spark plugs and leads.

So far I have not seen any EML appear and shall be doing the paper clip test for piece of mind.

The weekend is going to be busy :-/

[nixoro]

Think I may have solved all my troubles spent yesterday removing the sump to remove the alloy plug that wouldn't come out, now removed and fitted a new plug thank god the sump is steel, new plug fitted and sump refitted and this morning no signs of oil leaks.

Fitted some new plugs as the one which were in there the porcelain bits were turning a nice shade of brown.

Fresh oil and filter change car now ticks over lovely no lumpiness and I changed the leads today for good measure.

Also been having a coolant problem hopefully this is also now sorted found that one of the jubilee clips was slightly loose to the HBV so it was weeping, been doing this since I replaced the thermostat guess water is going round as it should do now.

Shall be keeping an eye but in all its been a pretty busy but worth while weekend

Just hope no more goes wrong.

Just thought I'd update as its been a while since I have been on here.

[Auto Addict]

 

[nixoro]

Cheers for the thumbs up

Still not fixed unfortunately even fitted a new dispack to see if the lumpiness on startup would go but no its still there.

Thinking my next option is to check egr valve again and if its not the issue then compression test it is.

Its weird cos when all the lumpiness happens its goes then engine is steady as a rock mainly occurs when on choke if it has one at initial startup.

Car now since replacing plugs leads and dispack pulls like a rocket shall be checking the timing at the weekend for piece of mind.

Checked the vac pipe from the egr and its sucking air no problem.

So still doom and gloom at the moment.

[nixoro]

Has anyone got any other ideas other than the previously stated.

Any ideas are much appreciated

[hotel21]

EGR only really has an effect at cruising speeds, not idle, if I understand things correctly.  Its used as a means to lean off the mixture to increase cruising consumption as opposed to idle settings.

If idle is lumpy, then the Idle Control Valve is the normal culprit, or an air leak of some descriptionb.  try squirting carb cleaner round pipes and joints to see if there is any idle speed effect when the goofy juice gets into the intake system.  Change in revs is the giveaway.....

[nixoro]

EGR only really has an effect at cruising speeds, not idle, if I understand things correctly.  Its used as a means to lean off the mixture to increase cruising consumption as opposed to idle settings.

If idle is lumpy, then the Idle Control Valve is the normal culprit, or an air leak of some descriptionb.  try squirting carb cleaner round pipes and joints to see if there is any idle speed effect when the goofy juice gets into the intake system.  Change in revs is the giveaway.....

Cheers for the heads up shall be having a good look at the weekend, I know that the ICV the top bolt thread is fubarred so it could be the join, trouble is it only seems to happen when the engine is cold.

Shall try the carb cleaner idea and see how I get on

[hotel21]

EGR only really has an effect at cruising speeds, not idle, if I understand things correctly.  Its used as a means to lean off the mixture to increase cruising consumption as opposed to idle settings.

If idle is lumpy, then the Idle Control Valve is the normal culprit, or an air leak of some descriptionb.  try squirting carb cleaner round pipes and joints to see if there is any idle speed effect when the goofy juice gets into the intake system.  Change in revs is the giveaway.....

 

that should read 'cruising consumption figures'........