Question about 2001 Mercury Grand Marquis

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Engine missing are low revs some times

Engine missing are low revs some times

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Could be a number of things start off cheap spark plugs, wires if you have any next not so cheap coil packs connect directly to spark plug with little boot vacuum leaks hoses that are rotted or loose etcc. good luck

Posted on Feb 07, 2010

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Posted on Jan 02, 2017

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1 Answer

Pings low rpms uphill


Pinging or detonation is normally caused from incorrect fuel mixture---timing or not changing gears when the load for the engine becomes excessive for the revs. Left unchecked it will damage the pistons. Use a higher grade octane rating fuel (give ethanol mix a miss). Have the ignition timing checked and corrected. and ensure that the auto is changing when it should be or change gears more often and keep the revs up.

Mar 31, 2013 | 1998 Pontiac Bonneville

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Wen the engine is on low rev d engine shakes


this is a miss fire cheak plugs and engine mounts

Aug 25, 2012 | Nissan Nissan Cars & Trucks

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My jeep is missing when idling and rev it and revs comes down slowly and missing just above 1000 rev and then falls to normal rev.what could be wrong?


If the engine has a constant miss the computer should record a trouble code or two.
Is the check engine light on ?

Aug 08, 2012 | 1998 Jeep Cherokee 4WD

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I have porsche cayenne s with turbo exhaust system......i hav changed spark plugs at 46000 km....and after 48000km it started missing when we drive it fast and then slows down it starts missing at low revs...


first of all let car get cold
open hood chek spark pluge cable weather they are fitted well or not if every thing fine also make sure the tight spark plug well..



if above fine might some oxygen sensor problem u can chk with dealer computer

Jun 18, 2011 | Porsche Cayenne Cars & Trucks

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I had intermediate "sputtering" at low RPMs on my


module miss fire may destroy catalytic convertor,rev engine listen for hissing sound feel exhaust flow at tail pipe.convertors can plug up by missfire

Feb 18, 2011 | 1986 Ford Econoline

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My truck won't rev more than 3,000 rpm's or go faster than 40 mph. Idles okay , runs okay at low speeds and low rpm's. I can't even get on the freeway, takes a long time to pick up any speed.


Hi:
A couple easy things to check out are your fuel filter and air filter. The fuel filter can be very restricted and cause a similar problem. , The air filter, not so much.
Plugged up catalytic converters can cause a loss of power too.! Hope you find your problem..

Jun 01, 2010 | Mazda B2300 Cars & Trucks

1 Answer

Oil lamp lights at 750rpms


750 rpm?

your revs are too low.

The engine speed drives the oil pump via the timing belt.

too low revs = poor pump speed = low pressure.

I'll bet when you rev the idle speed faster, the warning goes off?

Apr 30, 2010 | 2004 Chrysler Sebring

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ENGINE MISSING ABOVE 3800 RPM


no the code is most likely from a dpfe sensor for you egr system not the egr valve itself.a clogged fuel filter though might cause your low revs

May 02, 2009 | Ford Taurus Cars & Trucks

1 Answer

Timing chain broke


Hello,Bad Luck with timing chain failure,
Sorry to bear bad news but as far as I know Gm engines are NOT safe i.e. the valve miss pistons. It sometimes isn't too severe if very low rev's i.e. tickover, usually 2 or 3 exhuaust and same inlet. Let's hope no seats.
Cheer's!
Paul 'W'
Onyer~EDson(:0)~[><

Dec 09, 2008 | 2002 Chevrolet Tracker

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