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Running rich

Hi there I have a Range Rover p38 v8 Mk2 and appears to be runnming rich at cold starts. I noticed a little amount of black smoke emiited from the exhaust after about 10sec, upon starting. Any suggestions

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  • Cars & Trucks Master
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What year please ,because to me this has carbs and a distributor unless stated the year

Posted on Nov 21, 2013

Testimonial: "Thanks for getting back the year is 1998 MK2 p38 HSE its a distributorless and EFI no carbs. Wondering whether its the coolant sensor or fuel regulator. No egine light is on so not he O2 sensors."

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Posted on Jan 02, 2017

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SOURCE: Range Rover p38 bmw 2.5 injection running problem

Hello,
It turned out to be a broken wire on the injector which was causing a bad connection,now running better than before.
The cold was just a coincidence.

Thank you and best regards,Yvonne

Posted on Jan 08, 2009

Mike258
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SOURCE: My P38 Range Rover wont start

Hi Adam,

Bring your vehicle to an auto parts or battery store. Ask if they could perform a 'Load Check' on your battery. This not only checks the voltage, but also the amps, as if it were under the load of turning your engine.

It takes a few seconds and the results are pass or fail. Fail means it's time for a new battery. Pass means we need to look elsewhere.

Comment back the results.

Hope you find this to be very helpful
Mike

Posted on Sep 21, 2009

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SOURCE: how do i resolve Range Rover p38 immobilisor

sounds like keyfob has lost its sync with the car, look online lots of places tell you how to re-ai.lgn them

Posted on Apr 02, 2010

  • 3287 Answers

SOURCE: Black smoke from exhaust

Hi Paul,
I think you're right - it sounds like you're running to RICH (too much fuel / not enough air), but I would think that you'd see the check engine light on.
If you are too rich, there's probably an O2 sensor or other computer issue going on - and if allowed to persist, you'll probably end up with a clogged catalytic converter. As long as the sensor / computer is adjusting your air : fuel ratio, there little you can do to override it. I believe the computer will continue to adjust the mixture to get what it wants to see by the O2 sensor in the exhaust.
Bring it to a mechanic / dealer to get this fixed correctly - before you waste any more fuel or cause additional problems with the cat converter or other parts.

Good luck!

Posted on Jul 01, 2013

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1 Answer

Black smoke from exhaust


Hi Paul,
I think you're right - it sounds like you're running to RICH (too much fuel / not enough air), but I would think that you'd see the check engine light on.
If you are too rich, there's probably an O2 sensor or other computer issue going on - and if allowed to persist, you'll probably end up with a clogged catalytic converter. As long as the sensor / computer is adjusting your air : fuel ratio, there little you can do to override it. I believe the computer will continue to adjust the mixture to get what it wants to see by the O2 sensor in the exhaust.
Bring it to a mechanic / dealer to get this fixed correctly - before you waste any more fuel or cause additional problems with the cat converter or other parts.

Good luck!

Jul 01, 2013 | Cars & Trucks

3 Answers

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Black smoke is caused by excess fuel that has entered the cylinder area and cannot be burned completely. Another term for excess fuel is "running rich." Poor fuel mileage is also a common complaint when black smoke comes out of the tailpipe. Black smoke out the tailpipe is the least cause for alarm. Excess fuel will usually effect engine performance, reduce fuel economy, and produce a fuel odor. How did the fuel get into the cylinder in the first place? Some of the causes of excess fuel are a carburetor that is out of adjustment, a faulty fuel pump, a leaky fuel injector, or a faulty engine computer or computer sensor. If black smoke is present, check the engine oil as in the white smoke example to make sure excess fuel has not contaminated it. Do not start the engine if a heavy, raw fuel smell can be detected in the engine oil. Call your mechanic and advise him of what you have found. I hope this helps you determine what could be causing your engine smoke

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Hi, I have a 1998 Range Rover P38 and it takes up to 4 cranks to start the engine when cold. After the vehicle is warmed up it starts after the first crank. Any idea what the problem may be?


Hi Servo, Try replacing the temperature which sends signals to the computer. Seems you have a problem with the cold start system which is controlled from that sensor. Regards John

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Range Rover p38 bmw 2.5 injection running problem


Hello,
It turned out to be a broken wire on the injector which was causing a bad connection,now running better than before.
The cold was just a coincidence.

Thank you and best regards,Yvonne

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Could your throttle position sensor, or Idle Control Valve be sticking?

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