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Gm code po621

2004 vectra dti 1900 poor starting , excess smoke , will not rev over 1500 rpm

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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  • 101 Answers

SOURCE: when I start the engine from cold it runs on high revs too long

Hi ..... This sounds as if it's fitted with an automatic choke, as long as the revs drop when it's warm there is nothing to worry about. The indication when these start to go wrong is that the car won't start when cold ................ even then any decent mechanic can fit a normal/manual choke.

Posted on Jan 03, 2009

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  • 2 Answers

SOURCE: vw bora 1900 diesel dti

Contrary to Georgies belief, this sounds more like you Air mass meter is either Faulty/ knackered, new mass metres can be bought for about 70 to 80 quid and are really easy to change.

(Air mass metres measure the amount of air your engine is intaking and supply the appropiate amount of fuel, if your mass metre is not working correctly you car will be like a standard diesel engine rather than a turbo, car will be really sluggish/ very little acceleration)



Just do a quick search on VW air metres and this should confirm the above. I can almost 100% guarentee thats the fault on your car

Posted on Jan 04, 2009

demonram440
  • 42 Answers

SOURCE: 1997 ram 1500 5.9 wont rev past 2000 rpm

well, the timing on your ram is computer controlled. is the truck in drive when this mis-fire occurs? or at idle? youve addressed part of your ignition w/the cap-rotor-plug wires. did you examine the old cap for carbon tracking? did you install the rotor properly? i know on my '97 ram the dist is feakin' buried in the engine it would be easy to rotate the rotor while installing/removing it so the timing mark is off. does your engine have the right plugs installed? your plug wires follow the correct firing order with your dist? you did not mention anything about your ignition coil. here is how to safely remove and check your ignition coil. disconnect battery-at the coil disconnect the lead wire (TOP) and primary (BOTTOM) from the coil. label your wires, or take a pic of your ign coil before you remove it so if you forget where the wires go, you have reference point. remove mounting screws and remove coil. clean coil to remove rust/dirt and wipe coil terminals off. inspect case for damage. with a multi-meter, check coil primary resistance by selecting ohm's and then place + and - leads on the pos/neg terminals on the coil, dodge used 2 brands of coils either a "diamond" or a "denso" primary resistance for the diamond mfr'd coil will be between 0.97-1.18 ohms. secondary resistance 11,300-15,300 ohms. Denso primary resistance 0.95-1.20 secondary resistance of 11,300-13,300 ohms. to measure secondary resistance place one of the leads to one the primary terminals and the other lead attatch to the large center terminal. compare your readings to the above values. if your readings are not within range of the above values, your problem is the ignition coil. other causes you may consider is faulty: speed sensor, throttle pos sensor/trans issues like bad pressure solenoid (actuates gear changes) a fault in your overdrive system. hope i have helped!

Posted on Feb 27, 2009

  • 677 Answers

SOURCE: have a polo 1.4 tdi and the car does not rev up !

It may be a few different problems but try this first.Take the air filter out and try the engine, then.If its a lot different the filter may be clogged.This will cost zero but may give you an answer.Hope this helps. PS dont go driving around without the air filter as it will damage the motor

Posted on Dec 09, 2009

alicantecoli
  • 22219 Answers

SOURCE: adjust timing on a 4g64 gdi engine

you have a problem here ,ask a local mechanic to have a look

Posted on Mar 15, 2010

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Not familiar with the vehicle however, if the "d" in "dti" stands for diesel, id check the large fuel filter; usually under the hood (bonnet). Possibly only needs the air bled out -especially if the filter has been changed recently.

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Yesterday my 1993 chevy s-10 blazer was driving fine but when i cut it off and went in the house for a second and went to crank it back up it wouldn't start it turnsover when i turn the key and its getting...


If you are sure you have a spark to at least half of the plugs, and there is no reason to suspect that the engine was being used abnormally just before it was shut down then it is most likely flooded or you ran out of gas.
Black smoke from the tailpipe indicates that the engine is getting a fuel mixture abnormally high in fuel (flooding). White smoke generally indicates not enough fuel.
Unless your engine is damaged or the timing changed, your engine will run if it has the following: proper fuel mixture, air, a spark to at least half of the spark plugs, and compression.
For a "flooded" engine there are two routes. Wait until the excess fuel has had time to dissipate or hold the accelerator to the floor while attempting to start. Be prepared to let off the accelerator about halfway as soon as it starts. And then down to about 1500 rpm. You do not want to over rev the engine. But holding it at about 1500 rpms for about 3-5 seconds will help flush out any excess fuel. You can then slowly return it to idle speed.

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