Mr.Duck

iTrader: (8)

so my engine is stuttering.. in every gear if i get on the gas more than like 15% throttle the engine stutters, and my car feels like its lurching a bit. and also when my car is idling, my exhaust sounds like its almost backfiring. i am getting no CEL's either. anyone have any ideas?

Slickismax

iTrader: (4)

Clean your MAF, clean your throttle body, replace spark plugs, and replace your fuel filter if you haven't done so already.

QNO_A32

iTrader: (7)

it could be your KS especially cuz you said you have no codes. try and pull them anyway but the backfiring at idle sounds like a miss. i would check the values on the coils.

99BlackMaxMS

iTrader: (85)

Id check your MAF.

Divewjason

Could be coil packs. Your car does NOT have to throw any codes for it to be a coil pack. I know this from experience when my car started showing the same symptoms as you described.

rnmaxima

if it is the coil packs you'll get a misfire code and the knock sensor will show a code as well.....move coil packs around to see if the misfire follows the change in cylinder....

tigersharkdude

iTrader: (20)

go to advanced or autozone and check codes. probably KS or a coil pack.
i had the same problem. like THE SAME PROBLEM. changed the KS and cylinder 5 CP and the problem went away

The Wizard

iTrader: (43)

If the coilpack is 100% bad, then yes chances are you'll get a CEL. If the coilpack is still working, but dying (failing at WOT for example), a CEL may not come up. I know this from experience, take it FWIW.

And just to clarify, the KS may throw a code, but it does NOT trigger a CEL, ever. The user has to check for the KS code manually.




Mr. Duck, although you don't have a CEL, did you check for codes anyway? (for the KS code)

When is the last time you checked/replaced the spark plugs?

Is your Max a '99 by chance?

My hunch says spark plugs, coilpacks, injectors, or MAF.

Snypa

iTrader: (35)

My guess is MAF as well, but how does someone go about checking it. Like taking it off and inspecting for dirt etc.?

internetautomar

iTrader: (30)

Dave- does your RPM still go up?
mine does, but no power, until WHAM! it kicks in and shifts (A/T).
Ive got a CEL now from my o2, as well as the KS. one of these days Ill replace both pieces, but for now they are sitting waiting to be installed.

Product_Of_Korea

iTrader: (8)

easiest way to see if its the ks is to rig up a 470k resistor in the ks harness. you can get 5 of them at radio shack for 99 cents. slap one of those in and that way you can use the process of elimination