Question about 1999 Mitsubishi Montero Sport

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When i first start the engine it starts brillant, but when started later on it has trouble like its sucking in air

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Sounds like a vacuum line is dry-rotted or become separated for somewhere look for the obvious very common look for that first and see if any vacuum lines are rotted out or missing all together

Posted on Sep 07, 2009


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I'm having trouble starting the car. When it idols the RPM's pulsates up-and-down and then it stalls. Once under way the car seems to run fine but without any warning it will die as I start to

check air filter, might be plugged, [dirty so engine is starving for air.] check fuel lines & filters, dirt blockage need replaceing, check for fuel leaks in lines etc, uses fuel & then sucks air causing it to stop, listen to see if fuel pump is running properly & not stuttering could be short in it's wiring

Dec 16, 2012 | 1994 Mercedes-Benz E-Class

1 Answer

Every time I put gas in my car it takes approx. ten minutes before it will start up. I let my car run while putting gas in it and my car stopped running. But I was able to start it back up 10 minutes later

keeping the vehicle running during a fill up is a definite NO NO! there is the increased risk of a fire(very bad) the possibikity of someone stealing your car(bad) and the increase for the problem you are experianceing( not so bad, fixable and preventable). the reason youre having the trouble is youre essentially flooding the engine with raw gas. while the engine is running it creates vaccuum in the evaporative emission system. in a nutshell, its constantly sucking the fumes out of the gas tank and burning them by running it thru the engine, there is a small valve in the tank thats supposed to be exposed to air in the tank, when you fill the tank with the engine running you are drawing this air out while the fuel is being added and you are more than likely sucking the raw fuel into the charcoal canister and its becoming flooded with fuel instead of vapor. after you wait about 10 min this exess fuel has evaporated enough that just the vapor is being drawn into the engine again and allowing it to start. in short dont keep the car running while filling, dont fill past where the hose shuts off the first time, trying to cram an extra half gallon into the tank, and this should no longer be an issue.

Mar 14, 2011 | 2004 Hyundai Santa Fe

1 Answer

1996 Plymouth Grand Voyager SE 3.3L R Problems originated with no lighter, no high beams, no power locks, then radio went out, checked fuses all were fine. Don't know if problems are related but now (a...

This looks like you have the fuel tank vacuum. When is in repaus, the tank is sucking some air. When you start the engine, the fuel pump is sucking the fuel from tank and if this don't have a breathing hole or if this is clog or obturated then the fuel pump cannot **** anymore fuel and the engine stops. If you let it for a period of time alone then the tank might **** some air but not enough, so the engine will start but the simptome will show again. I had this simptomes with my car. Try to remove the fuel tank cap and see if you can drive more than 6-7 miles. If so, then the special breathing air hole in the fuel tank is clog. Identify it and clean it. I am not so sure about this problem but is just an ideea. Might be helpfull, who knows? Otherwise should be a PCM problem. In this case you should make a computer test. Good luck!

Feb 16, 2011 | 1996 Plymouth Voyager

1 Answer

I have a 1989 international truck w/ 7.3 litre diesel. Same engine as in 1989 ford f-350 diesel. Trouble starting. I replaced glow plugs and glow plug controller / relay. Still problem starting do not want...

you answered your own question with # 1
the fuel leak is doing opposite when starting it is sucking
air . i had the same problem on mine,
it also let the fuel drain back to the tank that then
takes forever to reprime itself
hope this helps

Nov 14, 2010 | 1989 Ford F 350

2 Answers

My car accelerates and uncelarates alone and idont know why

Known in the trade as 'Toying'

Toying is normally caused by air leaks on the inlet side of the engine. Easy to diagnose, spray easy-start over the inlet side of the engine, when and if you get to the leak area the leak will **** some easy start into the engine and the revs will race up for a moment.

If it isn't sucking in air then it will be a sensor failure ie front Lambda sensor

Hope you get it sorted


Dec 09, 2009 | 1997 Honda Civic

1 Answer

When i start my 99 lumina it starts sucking alot of air

check to see whre the EGR valve is it might be sticking this will cause it to also stall at a stop light . Also cause rough running ..

Apr 13, 2009 | 1999 Chevrolet Lumina

1 Answer

1999 Jeep Grand Cherokee Laredo won't run

if ur jeep has central lockin lock it and then unlock it ..........she might b sucking air inn

Feb 26, 2009 | 1999 Jeep Grand Cherokee

1 Answer

Car died while driving

it could just be a sensor malfunctioning from possibly getting too hot. as everyone knows slow traffic sucks....well its hard on the car too because the car gets alot hotter in the engine bay due to lack of air flow.....heat like that can make sensors malfunction everyonce n awhile....i wouldnt worry bout it unless it happens again...which it shouldnt.

Oct 02, 2008 | 2001 BMW 325

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