ZhiuPei

iTrader: (18)

Car runs but when it start moving, i can tell there is a missfire

i plug in a snap on scanner and it shows that it missfire in all cyl, but then dissapears.

Like, it comes and goes..

Still car runs ok on cruising speed.

No check engine lights at the moment.

Could it coils?

120k maint recently done.

Any input, really appreciated


thanks

Stan

BCP43002

You should get a check engine light if it were the coils. I doubt they all would go at once. Did you just get gas?

GS4_Fiend

iTrader: (22)

If it happen after you got the aftermarket intake, i would put back the OEM intake

ZhiuPei

iTrader: (18)

I think I figure it out. The intake was there. The engine bay got wash clean and maybe some water got in? It limps once it starts driving and no check engine. If so, how could I clean the water?

GS4_Fiend

iTrader: (22)

You can't clean the water lol. You can wait until it's dry.

ZhiuPei

iTrader: (18)

Meanwhile can I drive the car like that?

clos430

iTrader: (21)

Get some compressed air and blow around coils, also remove spark plugs and do the same inside cylinders, should be fine afterwards. I wouldn't drive it with the misfire you might damage the cats.

ZhiuPei

iTrader: (18)

Ah drove it like that so far ok... I hope it doesn't take a ctrap on me since I did 450 miles ha. I keep getting the stupid vsc. Vsc off check engine light cuz of the gas cap arg

ZhiuPei

iTrader: (18)

ok

Check for water4 and nothing.. scanner said 5 coils are bad and replaced them..
After that.. car still missfire.. Still shakes.. still hesitate whenever i accelerate??

what can it be???

Spark plugs are clean..
no water inside..

GS4_Fiend

iTrader: (22)

Disconnect the MAF sensor, start the car, see if it runs better. If yes, MAF is bad.

ZhiuPei

iTrader: (18)

took the maf out cleaning it right now.
Do u know the voltage reading of the maf?
Mine is going from 7 to like 9. something

Disconnecting the battery right now and ill check wa zup

ZhiuPei

iTrader: (18)

dammit still missfire..

Its crazyy for couple seconds cyls. from 1 to 8 missfire and then bang goes back to cero..

stan\

GS4_Fiend

iTrader: (22)

According to manufacturer testing prodecures:

Disconnect MAF sensor and test the resistance within specs:
Terminals THA & E2, the first and second pin.
2.21 - 2.69 k ohms @ 68 degrees F
.49 - .67 k ohms @ 140 degrees F

Also, try disconnecting the MAF, then start the car and see how the car runs, if it runs better than MAF is bad as I already stated.

I got a feeling the car is not dried yet.

ZhiuPei

iTrader: (18)

checked everywhere.. we cant find water..

once we start the car it runs smooth.. couple more minutes and bang the hesitation starts again.. could it be the MAF???

GS4_Fiend

iTrader: (22)

Did you test the MAF yet????