Question about 1989 Mitsubishi Sigma

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Carby runs good cold then terriable

I hav a mitsubishi trition with a 4g54/g54b motor 2.6l same as sigma engine it run good but idle is a problemwhen it cold it idles well butthe when it hot it drops down n runss really ruff at idle n stall's after a while but if u fly down a hill fast it idle hot really good n it is bugger to start hot but when it cold its easy it's not the choke got any idea's

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  • grun_ka_lunk Mar 04, 2009

    um it a petrol i 4got to tell u n it just had new ring n timing chain its brand new it somthing with the carby

  • grun_ka_lunk Mar 04, 2009

    how much would a recondition carby be from a wrecker or it be worth to pay 4 one



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Hey nake sure your timing is correct or also that ur glow plugs are still holding on strong there is also a few other problems it could be like ur fuel injecters cud be blocked or your injector pump may be leaking or sucking air!!! best of luck hope it help alittle!!


Posted on Mar 04, 2009

  • Tell85 Mar 04, 2009

    ok well im sorry i cudnt help matey good luck with it



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How can I tell if the solenoid in the carb is bad? Started getting gray smoke and it's hard to start. Won't idle cold at all.

the idle solenoid at the base of the carby is used to shut off the fuel idle circuit when the ignition is turned off
If it is bad then the engine will not idle but will run if the throttle is kept partially open
IF the starting problem is made easier by holding the accelerator open a bit then it could well be that solenoid
the "grey" smoke could be condensation from cold weather when starting
If the carby has an automatic choke then check that adjustment as it may not be coming on correctly when cold

Dec 21, 2015 | Cars & Trucks

1 Answer

Diagrama de cadema del tiempo de motor mitsubishi 4g54

english please
(what is cadema) ??? that is not spanish.
you mean CAM TIME?
Did you mean:CAMshaft or spark?
Arbol de levas?? Do tell country and full car info
make of car Mitsu.
model Monero
what year>?????????????? 1982 to 1997

wiki on this is

May 02, 2014 | Mitsubishi Montero Cars & Trucks

1 Answer

350 holley diagram

Check for vacuum leaks--pipe to base of carby for distributor---vacuum brake hose. Check float levels check power valve diaphragm is not burnt or has a hole. Check the gasket at the base of the carby Screw both idle mixture right in then back each 2and 1/2 turns . Use the throttle until you can get the engine to run and reduce throttle until it idles on the jets.. Check engine timing and correct firing order.

Apr 28, 2013 | Cars & Trucks

1 Answer

Idle problem integra

check the MAP sensor (manifold absolute pressure). The ECM (car computer) uses that to keep idle at minimum 750 RPM. It's normal for it to run high when cold. These small 4 banger motors typically run hot, and they won't run right IF they're NOT running hot, ergo the idle is usually high when it is cold so as to cause it to warm up quicker. If the RPM's drop below 750, suspect the MAP sensor, &/or ECM.

Apr 18, 2013 | 1995 Acura Integra Coupe

1 Answer

Car starts fine when cold and runs and idles fine. When hot, car does not start.

Sounds like you have a fuel vaporisiation fault. If a carby ther should be a fiber gasket between the carby and the manifold to stop the engine heat transfereing to the carby and boiling off the fuel. If efi system I would be looking at the regulators in the fuel manifold for excessive drain back. Have it checked at a dealer.

Jan 10, 2013 | 1991 Buick Century

1 Answer

1999 ford expedition 5.8 trition motor idles to low, was run fine now wont idle.

you can idle it up by adjusting the idle screw on the carby

Oct 20, 2010 | 1999 Ford Expedition

1 Answer

How many chain links from camshaft sprocket mark to crankshaft sprocket mark on a 4G54

Click on the following free Link. It has the Timing Belt/Mark Diagrams you will need for your 1989 Mitsubishi Sigma.
You can count the number of notches on the Belt giving you the number of chain links between the Front and/or Rear Camshaft Marks to the Crankshaft Sprocket.

Let me know if this helped....

Mar 09, 2010 | 1989 Mitsubishi Sigma

1 Answer

Engine idle trouble

that is not a probelem it is the fuel system warming the engine and turbo
you should always warm up a turbo car before jumping in and taking off and cool the engine before shuting it off turbos are the most temprelental engine part there is. those steps will prolong the life of the turbo and engine. my starion with the g54b 2.6 does the same thing

Nov 23, 2008 | 1988 Mitsubishi Starion

2 Answers

Colt idle problem.

Most likely you have a bad Idle motor which is a small motor mounted on the intake manifold. If the motor can run better with your foot on the gas but dies if removed then it is probably this. This motor is controlled by the OBDII computer which gets it's control signal from the temp sensor which is located either on the radiator or engine block (which could also be bad), if the electric fan (if equipped) turns on then this is not the problem part, but the idle motor is. Another possibility is that you have some bad /cracked vacuum hoses which should be checked for first, before replacing the idle motor.

Jul 05, 2008 | 1991 Plymouth Colt

2 Answers

Timing and balance shaft chains 4g54 mitsubishi

Hi mate, your best bet is to go to the library, they have the manuals there. They let you photocopy a third of the book for free, casue you cant borrow it. I've got the same motor and thats how I got all the info for it. You can either get the maual for a 2lt sigma or 2.6lt sigma or scorpion. they have the same set up and they give you all the diagrams.

Jun 02, 2008 | 2005 Mitsubishi Galant

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