hello every one my 1992 mitsubishi 3000 gt sl 3.0 non turbo isnt quite running right as it seems to have some sort of miss under load and acts kinda sluggish wen taking off from a dead stop from time to time
THINGS I HAVE DONE TO THE CAR SO FAR INCLUDE:
CHANGING PLUGS AND SPARK PLUG WIRES
SWAPPING OUT 2 DIFFERENT ECU'S
BRAND NEW IAC STEPPER MOTOR
BRAND NEW PTU
BRAND NEW FUEL FILTER
BRAND NEW BATTERY
ADDING SEAFOAM TO ENGINE OIL AND INTAKE VACUUM LINES AS WELL AS INJECTOR CLEANER TO THE GASOLINE
im not sure where to go from here?? im absolutely clueless on wat to do from here as im not sure if its the coil packs, slightly out of time or even somethin as simple as the maf sensor being dirty.. the car doesnt seem to have any check engine lights on or anything like that so your advice wood only be helpful here.. if it is something as easy as the maf well how do i get it apart to clean it?? since this is a 92 model is there a crank sensor or ignition timing adjustment here or is that not the prob?? please help

just changed out the air filter which was pretty dirty... still acting the same so is there an easy way to clean the maf sensor or is this not likely the problem

a guess

might be the maf ... can you test if they are ok ?

you done all the right things to fix the problem by the list

what are the compressions like for each cylinder
it might be a leaky valve or weak rings (IMG:style_emoticons/default/gunsmilie.gif)

i tried unplugging the maf sensor to see if it would make a difference and it runs like crap when you unplug it so i dont know if it is dirty but will clean it next week... as far as the compressions check ill try to do that next week but what shood i be looking for on the gauge?? i guess what im asking is what does good compression run?

I agree, check compression, around 180+ should be good, the main thing is that all cylinders should be close, within 15% of each other. Like if there is a 160, and a 190 then thats kind of borderline. It would be best if you had a MAS to actually switch out as there is not really a way to clean it. You could also check timing with a timing light, or if you do not have access to that then slowly slide the cam sensor a few degrees and see if it improves.

I haven't seen this mentioned yet, or maybe I missed it. But you should check the cam timing as well. Check to see that all 4 cams and the crankshaft are lined up with their respective timing marks. If any are off a tooth or two, this could cause a lack in power, depending on which sprocket is off and how much, and in what direction..

so is it possible thatg i am off by a tooth that the engine is done for?? it doesnt really make any weird noises

1-2 teeth you should be ok, but it may run like shit, as you are experiencing. another couple teeth off and your valves will slam into your pistons.

if u have a missfire under load it usually points to a failed coil pack remove all ur coil packs and test the resistances between the primary and secondary windings and compare all 6 this also happens on evos under load they start to frap and bang like it has anti lag

hey sounds like a very good and possible idea .. i will check it out as soon as i can then let u all know... thanks for the great advice so far

well i just figured out that im not going to do the compression check as i just changed plugs out again and she is running very nice and smooth without the miss that it had in the past...thanks for all the great help and advice so far