Thread: on minute its great. the next its sputtering and taping

just bought my wife a 2000gtp today she liked my 1999 so much she wanted one of her own. well we went and picked it up 121k on the motor and trans. no issues other than a few blemishes visually.... well drove it about 120 miles home and to and from the car wash and everything was great. about an hour later we go to take it to dinner and its sputtering and sounds like its tapping. im wondering if it probably a bad coil or somehow something happend to the motor in 130 miles. no check engine lights but i havent had a chance to scan for codes :/......... any help would be greatly appriciated thanks in advance

Misfires, pinging??

Hard to say without any codes.

Check the spark plugs and wire and coils for any issues.

I'd look into the ignition. When I got my car I'm not even sure if the plugs had ever been changed. Ran smooth till one day when it was misfiring bad one day.

Otherwise has it had a tune up.

I'd look into the ignition. When I got my car I'm not even sure if the plugs had ever been changed. Ran smooth till one day when it was misfiring bad one day.

Otherwise has it had a tune up.

no no tune up yet. couldnt get into the shop today or into my buddys garage to do it myself :/ but tomorrow im doin the oil, fuel filter, air filter, plugs, wires, and then im gonna buy a scanner aswell... maybe theres a code but its just not triggering the CEL . im really hopeing i dont have to bust out my multimeter lol i HATE chasing ghosts

I bet it'll be back to normal after a good tune up.

always with 93. just put in ngk iridium plugs and wires and didnt do a thing, bought a scanner and it pulled code P0304 misfire in cylinder 4. went back to autozone and bought a new coil. installed it and still having a misfire in cylinder 4 :/. all plugs were gapped to spec 0.060 before they were installed

the last thing i can think of is the ICM and my wifes gonna grab it on her way home.... if that doesnt work what else could it be?

Plugged or bad injector on cyl 4 ? Ran any cleaner through it like Seafoam?

no havnet run any cleaner though it yet.... if the icm doesnt fix it ill get some seafoam

I'd run it through it anyways. Never hurts! It's cheap!

yea wifey just got home ima add it to the fuel and in the vacuum lines and a little in the motor that way its everywhere haha

Do a compression check

rynoman you sir are a god. i decided to run the seafoam through it first before i startred digging into the icm and sure enough the tap stopped and the motor started running smooth as hell half way through the bottle i cought it on video with my gopro aswell and it was cool as **** being able to hear the tap pretty much suddenly fade away lol. thank you again i would have never thought of using the stuff this was my first experiance with it and im deff sold on the product

Did you do it through the Vac line first or fuel tank? The stuff does work well. I'm no God, just trying to help a fellow do it yourselfer out. You swapped out all of the easy stuff. Only fuel related things to try. Hope it solved your problem.

i put half the bottle in the tank (3/4 full) and the other half i used in the vacuum line. im posting the video of my success on youtube as we speak. ill post the link in here when its done incase ya wanna check it out

SeaFoam fixes bad injector on 2000 grand prix gtp - YouTube here it is

Seafoam should be a part of any tune up. I put a can through mine at least once a year.

thats just amazing to say the least.