Few Questions/Bad Misfire

[2001RSKuztomEdition]

Ok I've got a few questions that have been plaging me lately.
1. I have a misfire it usually only does it when the engine is hot and its usually when im at low rpms. I don't have a PO code thrown but my scanner is picking up a multiple cylinder misfire. its not smoking and seems like its getting enough fuel. could if be the MAF? for some reason mine keeps coming lose
2. Next i've been having probelms with my coolant. I threw the 02 code because the cat was cut off and then something about coolant below thermostate operating temp. then i had it flushed seemed like it helped but didnt get it scanned and the next day the temp gauge stopped working.. what could be wrong?
3. is that damn rattle when i up and down shift the I pipe hitting the floor where i cut the cat out?

[Tech]

Re: Few Questions/Bad Misfire

I have a misfire it usually only does it when the engine is hot and its usually when im at low rpms.

It does it at higher RPM's also, you just don't notice it. I'm willing to bet its a coil pack, 3.8's are notorious for burning them up.

[2001RSKuztomEdition]

Re: Few Questions/Bad Misfire

if it were coil packs though wouldn't it throw the\ose two individual cylinder codes?

[slowmaro96]

Re: Few Questions/Bad Misfire

if it were coil packs though wouldn't it throw the\ose two individual cylinder codes?

Not always. I had a bad misfire/stumble anywhere past 1/4 throttle.
Changed the plugs and wires and found out I had 2 bad wires and even with new plugs and wires it ran worse. Found out the front coil was bad and never ever got a check engine light.

[2001RSKuztomEdition]

Re: Few Questions/Bad Misfire

well i got it ..it was the coil packs... the hood had a nasty hole in it from a deer and water was runnin back on them...i found that out while i was workin on it in the rain..it was blwoin back and ruined 2 of the 3..but i got a new set and put the glasstek on ... so im good to go

[Kidcamaro98]

Re: Few Questions/Bad Misfire

Not always. I had a bad misfire/stumble anywhere past 1/4 throttle.
Changed the plugs and wires and found out I had 2 bad wires and even with new plugs and wires it ran worse. Found out the front coil was bad and never ever got a check engine light.

yah right now my car is doing the same thing....anywhere past 1/4 throttle it completly falls on its face...it stumbles like real bad. And i Put a new fuel filter on, Cleaned my injectors, Changed my spark plugs and put brand new MSD wires on it. I was throwing misfire codes as well before i changed the plugs and wires and after i did that, the code went away but my car still does it. I take it, its one of my coil packs for they have 100k on them.

[Kidcamaro98]

Re: Few Questions/Bad Misfire

well i got it ..it was the coil packs... the hood had a nasty hole in it from a deer and water was runnin back on them...i found that out while i was workin on it in the rain..it was blwoin back and ruined 2 of the 3..but i got a new set and put the glasstek on ... so im good to go

and now it runs better?

[Scott90]

Re: Few Questions/Bad Misfire

the coils are notorious for being terrible. mine was missfiring like crazy also due to the coils.