Car running rough

Damn my car is running like hell.
Its missing badly specially at lower rpm, hesitates when accelerating and there is a noticeable different in power obviously. There are two things I’m thinking that could cause this, maybe the ignition leads or it’s the Mass air sensor. the car is also searching at idle. I say ignition leads because I saw one of them sparking at nigh time when I had a check under the hood.

What do you guys think????

Think you should pull the codes.

and check your spark plugs, make sure there gaped right. bad plugs equal hesitation

Yea thanks it was due to the Ignition lead, problem now fixe for a mere $180.00 NZ

Yea thanks it was due to the Ignition lead, problem now fixe for a mere $180.00 NZ
I'm a little slow on some things but what is "Ignition Lead"? My car is running a little rough and you say that fixed it. I have changed the plugs and wires. Is this what your talking about? Thanks!

I guess you may call them spark plug leads, I didn't have to change the spark plugs

I guess you may call them spark plug leads, I didn't have to change the spark plugs
Glad this fixed your problem. The other day my 01 S-10 would not start. Never had a problem with it. Got my scanner out and nothing came up. Checked the battery leads and the problem was a dirty positive lead. They always tell you to check the simple stuff first. All my years of driving car's this was the first time this was a problem.

I guess you may call them spark plug leads, I didn't have to change the spark plugs

Spark Plug Wires?

if u pop ur hood and look at ur engine, u will see 6 large black wires connected on the left side next to the plate that says mistubishi on top and ur engine type on the bottom (ie V6 DOHC 24V) in large white lettering. each wire connects to a spark plug in each cylinder and provides the electricity for the spark that ignites the gas in each cylinder. if one spark plug isn't firing correctly because of a bad wire, it would cause ur engine to run badly and have a terrible idle. by looking at the entirety of each wire u should be able to see if any are worn or broken and if they need to be replaced. i tried to send a picture for clarity but it wont go through for some reason. unfortunetly im not a car know it all so i can't tell u much more than that. anyone with more knowledge want to shed some more light?

Wow i should really read all the of thread before posting. those are what ur spark plug wires are but if u replaced the spark plugs and wires then thats not the problem. the starter lead is the wire that goes to and from the starter in ur car but a bad starter lead wouldnt cause a bad idle and slow acceleration. u sure u replaced the spark plugs AND wires? cause if its not electrical ur probably getting into big bucks for repairs.

Problem already fixed, it was one of my spark plug wire's or maybe even the spark plugs since I replaced both, I saw one of the leads sparking at night which lead me to the problem......

No the other thing that could cause this sort of problem would be the Mass.....

i figured 92VR4red might have the same problem but not if he replaced the plugs and wires. wait so then if leads aren't the wires what are they?

lol bro your confusing me.

Look, I replaced the blue leads in the pic below......

http://memimage.cardomain.net/member_images/10/web/2122000-2122999/2122764_70_full.jpg

or it could be the The Mass Air Flow Sensor which converts the amount of air drawn into the engine and can cause thing like poor Idle and the obviouse performance!!!

Don't take my advise though, if things are looking bad get your car put on Mitsubishi's Diagnostic computer.

where how do u do that? do dealers have them? cause i've been wondering about my oxygen sensor for a while. whenever i push in the clutch and i haven't let off the gas for at least a full second the rpms jump. also my engine is idling lower and lower when its cold, sometimes stalling and making me start it up again and hold the gas down for a couple seconds. lol idk how much worse it'll get before it gets better. then again if these things have nothing in common and neither of which have to do with the oxygen sensor it wouldnt surprize me in the least cause i hardly know anything beyond basics about cars.

nice lookin stuff under that hood btw. and yeah i tried to take on online pic and color one of the leads in paint so i could save/copy and past it into the post box but it didn't work. anyway yeah thats what i was thinking they were. wires/leads, same thing. my b, my automotive vocab isn't too good.

where how do u do that? do dealers have them? cause i've been wondering about my oxygen sensor for a while. whenever i push in the clutch and i haven't let off the gas for at least a full second the rpms jump. also my engine is idling lower and lower when its cold, sometimes stalling and making me start it up again and hold the gas down for a couple seconds. lol idk how much worse it'll get before it gets better. then again if these things have nothing in common and neither of which have to do with the oxygen sensor it wouldnt surprize me in the least cause i hardly know anything beyond basics about cars.


I'm sorry, but I 100% disagree with Ralliart. Do not take your car to a dealership and pay for a diagnostic tests. That is the whole point of this website, to learn and work on your own cars. If you want to waste your money, then by all means, take it to a dealership and get them to screw with it...and I wish you hte best of luck (hopefully it runs when you get it back, and you don't have to sell it to pay the repair bill).

But if you want to learn, and fix it yourself. Start a new thread about it, be detailed, give us exact rpm #s, and if you are getting a Check Engine Light. And we will help. My first guess is it has nothing to do with the oxygen sensor.

First off I would never get Mitsubishi to repair you car………..

Although I agree and disagree with Igovert, I do think it would be best if you were able to diagnose the car yourself under the guide/advise of the 3kgt enthusiast on these forums, however if you don’t have the time, I would take it to Mitsubishi and get them to put it on there diagnostics, in most cases they should be able to tell you what the problem is, or at the least minimise the possible causes. Plugging there computer into your diagnostic port will not mess with your car and they should be able to tell you the facts within an 1hr.

Just be very specific about what you want them to do. Get them to tell you what they are going to do, and if they do anything above what you have paid for and something goes wrong, you are covered…….

With the information provided, it could be a number of things including you Mass air flow, Idle controller valve, ECU, spark plugs/egnition leads......etc:2cents:

Yeah, except they charge you $75-$90 to plug in their scanner. Rather, you could pull your own codes or get Autozone to pull htem for free, or buy a datalogger for the price of 1 diagnostic test at Mitsu. On top of that, once Mitsu has plugged in their scanner, they tell you to replace 3 different things...why? Probably, because they make more money that way. I worked at a dealership, which is why I now tell people to avoid them.

75-90usd:eek: its about 30-40USD here lol. We must be lucky here in NZ the Mitsi dealers here don't like messing with our cars, and generally tell us what the problem is just to get us out of there work shop lol.

75-90usd:eek: its about 30-40USD here lol. We must be lucky here in NZ the Mitsi dealers here don't like messing with our cars, and generally tell us what the problem is just to get us out of there work shop lol.

:rolleyes: Your receipts would indicate otherwise.