Multiple Cylinder Misfire??

[joealmighty13]

Recently, shortly after i had installed my new air intake, my car started running extremely sluggish and not shifting properly. So the Check engine light blinked for about a day then never came back on again. i went to auto zone and had it diagnosed. It said random multiple cylinder misfire. I have new bosch +4 sparks, and bosch performance wires in there. the Guy said thats what would be causing the problem. that or the coil. OR if its niether of those, it could be the injectors. has anyone else here had this problem? anybody have suggestions on how to fix this problem. all input is extremely appreciated.

same problem different Eng 3.4 ended up being low voltage throttle position sensor i thing or it could be ur intake fouling the air sensor

[jackal2000]

BOSCH IS THE DEVIL!! take them shits out and replace with ac delco asap. you can even get the ac delco platinums if u want. many people on here have had issue with bosch.

[battistoni21]

well im thinking the coils are bad..... exactly what the guy said..... i could be more helpful but i have the 2.4......

is your maf working correctly? and what about your AIT? is it positioned properly?

[joealmighty13]

well i had AC delco 2 days ago. i bought bosch after he told me this. it didnt change a thing. but thats fine, i thinks its something a lil more difficult to fix unfortunetly. il check the coils, i did just get the new intake so il check all the sensors over again.

[alero_ecotec]

bosch +4 misfire left and right, my local autozone refuses to sell them to people that ask for them, i had some in my old car and it was terrible, put in some AC delco or something like that, or some iridium

[alerored04]

check to make sure your intake tubing is all snugged on there or that your throttle body gasket isnt bad. Mine did that one day when the intake magically fell of the TB while i was driving it. I never looked at the intake and thought it was a fuel problem, changed the fuel filter before my roomate (who knows nothing about cars) looked into my engine bay and asked if the intake was supposed to be open. Man did i feel stupid. so yeah, check all your hose clamps. good luck.

I dont know if this is of any help but at the dealership I work at. People come in for check engine light, and sure knuff the check engine light is on with the multiple misfire code. And stright way they have either autolite or bosch plugs and wires causing the problem!

[SweetNLow]

autolite are fine plugs.

bosch suck rooster on the other hand.

he he

[MixtapeMessiah]

could be a bad relay, could be a bad switch. If u had a Tech II scan tool that shit can work wonders for you, sad thing is it costs bout $2,500 lol

[Redog]

Bosch +4 plugs, had the same problem.

Switch them and you'll be fine

[joealmighty13]

that gives me a lot of hope actually redog. im getting new plugs today, i hope to god they work cause i miss my alero. im sick of driving SUV's around. anyways il keep u all updated and thanx alot for all your input, its very helpful

[jackal2000]

i hope you are not paying someone to change the plugs.....waste o money. its pretty much the simplest thing to change. it can be a PITA but it isnt rocket science.

[joealmighty13]

lol of coarse im doin it myself, im actually pretty good under the hood. anyways the plugs and wires are changed and i still have the same f**kin problem. its getting very depressing. im not sure what else to do. anyone live in the western new york area that would be willing to take a look??

[jackal2000]

how many miles are on the car? like you said, it could be the injectors....

tru dat

[joealmighty13]

theres 59k on the car. im not sure how long injectors are supposed to be good for. i guess il have to see about those next.