Question about 2002 Mitsubishi Lancer

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My lancer wagon 4G15 fuel injected is rough idling when cold and when the power window is going up.What do you think is the promlem?

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Posted on Jan 02, 2017

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SOURCE: rough idle when cold and hot

have you replaced coil pack? Check EGR passage through upper mainfold and make sure clean. also make sure EGR valve not stuck part way open. Also check crank and cam sensors along with MAF.

Posted on Oct 19, 2009

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SOURCE: 87 chevy 350 fuel injected pickup wont run smoothly

sounds like your egr valve is gummed up or bad. this is located behind the throttle body and has a single vaccum tube connected to it. if the diafram is still good you can remove it and clean it with WD 40 until the plunger works smooth

Posted on Nov 08, 2009

  • 510 Answers

SOURCE: need valve adjustment for 1998 lancer 4g15 engine

I take it you mean 4g13 engine
if so inlet mm 0,20 HOT
ex mm 0,25 HOT.

Posted on Nov 08, 2009

  • 752 Answers

SOURCE: rough idle. rpms drop. misfire.

try your coil packs they go over your sparks or do plugs first and see what happens do affordable first

Posted on Feb 01, 2010

  • 181 Answers

SOURCE: My 1994 Mitsubishi Lancer (4g15) engine stops

Fuel pump

Posted on Mar 06, 2010

Testimonial: "It's the fuel pump indeed. Also the gas tank found to be very dirty. The fuel pump was replaced, fuel system cleaned, now the car runs perfectly."

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Mitsubishi lancer 2002 4g15 gdi it start ok idle ok but no power when moving an start miss an no check engine light . I do a diagnosed test an no fault


Start by verifying that the timing belt has not jumped a few teeth. You may also have a vacuum leak or poor fuel pressure. Undo the gas cap and see if the problem goes away. If it does, the fuel pump may be worn out.

May 30, 2017 | 2002 Mitsubishi Lancer

1 Answer

It was very cold, the car sat in the garage for 3 days with very lower fuel, now it idles rough and sounds rough, did I ruin something by not having enough fuel when cold?


No,low fuel isn't your problem. If there's enough fuel for the fuel pump to pick up your car should run okay. You haven't ruined anything. It's not your fault.

It is possible that a low fuel level - very low indeed - has allowed debris/dirt into the system and is causing a blockage. However, I think this is quite unlikely to be the problem you have.

You say the car idles rough - does it drive at speed okay? If it drives okay at speed you can rule out most fuel problems .. most.

Backtrack a bit .. has your car ever ran/idled roughly before? Cold weather can exacerbate a problem.

It could be the cold weather- fuel and injections system have cold start devices or sensors of one sort or another. It may be a faulty sensor. Get somebody to do a diagnostic check for you

Jan 25, 2016 | 2007 Buick Lucerne CXS Sedan

1 Answer

1990 4.o will start and run but when engine warm up,emisinos light comes on and then fuel pump loses pressure,


i think the problem is this joseph, its an inbread p.o.s of a vehical.you should burn it and buy a 350 chevy ha ha ha!

Jan 09, 2013 | 1990 Jeep Wagoneer Limited

1 Answer

1998 ck2a lancer 4g15 no go. have replaced dizzy, computer and tps. has spark and injector pulse and timing is fine. any help appreciated


the next thing to check is the fuel system.
is there fuel in the system, the tank, fuel lines. is there fuel pressure at the injectors? check the fuel pump electrical system, the fuse, fuel pump relay, fuel cut off circuit. some factory security system have a fuel inhibitor, that disable the fuel pump circuit!

Sep 11, 2012 | 1998 Mitsubishi Lancer

4 Answers

Carburetor Tuning Mitsubish.


As far as i know, original stock carburetor for Lancer 1989-1992 engine 4G15 12 valve is Aisan Variable Venturi. It have 3 screws :
- air-fuel mixture screw
- main jet adjusting screw
- idle adjusting screw

and here's the document you may need :
http://www.mitsubishi-motors.kiev.ua/info.php?id=20
http://www.lilevo.com/mirage/

Good luck !
Winz

Mar 23, 2009 | 1992 Mitsubishi Mirage

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