Why is my car Stuttering at WOT?
01-23-2010, 11:29 PM
#1
Why is my car Stuttering at WOT? First off for some reason it runs Alot harder in the cold mornings before its fully warmed up then it does when its fully wamred up. idk..
secondly my car at WOT starts to break up around 6k rpm. if i leave it around half throttle it doesnt break up. i dont think its valve float because i have brand new patriot extreme springs in there. even tho it started just after i replaced them, but i cant see them being the problem. opti/coil/wires/plugs are all brand new along with everything for the fuel system. does anyone have any input ? i usually shift it at my redline which is 6700 but if im flat out i can barely just hit 6000 its driving me insane!
secondly my car at WOT starts to break up around 6k rpm. if i leave it around half throttle it doesnt break up. i dont think its valve float because i have brand new patriot extreme springs in there. even tho it started just after i replaced them, but i cant see them being the problem. opti/coil/wires/plugs are all brand new along with everything for the fuel system. does anyone have any input ? i usually shift it at my redline which is 6700 but if im flat out i can barely just hit 6000 its driving me insane!
01-24-2010, 02:21 AM
#5
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i know you said you had fuel system done... 255? just curious because after i did this for my modded car it ran decent for awhile and then i began to understand why they say you need the wire kit for one of those pumps. yes they run fine for a stock to mildly modded car but once you get much over that they need more power than the stock wiring can provide. or at least thats what happened in my case... good luck and post up your results no matter what the solution! curious...
01-24-2010, 08:16 AM
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Have the valves been readjusted lately to make sure they are correct? I would pull a plug or two to check what it looks like are you running to rich to lean maybe loosing fuel pressure at wot hook up a gauge to it. Just throwing around a couple ideas.
01-24-2010, 11:24 AM
#7
ICM is also brand new...
i know you said you had fuel system done... 255? just curious because after i did this for my modded car it ran decent for awhile and then i began to understand why they say you need the wire kit for one of those pumps. yes they run fine for a stock to mildly modded car but once you get much over that they need more power than the stock wiring can provide. or at least thats what happened in my case... good luck and post up your results no matter what the solution! curious...
ill look up the kit later tonight and either buy it or make my own. thanks for the idea!thanks alot guys for all the ideas and tips! i really appreciate it. im going to try to get around to testing all of them out this week sometime. i hope all my problems lie somewhere in one, if not all of those things. thanks again!
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01-24-2010, 10:18 PM
#13
Saw Arching coming from cylinder 6 by spark plug, wrapped it with some heat wrap Ive got laying around and drove it. Better but still there, came back in garage and check for Arching again, now I see 2-3 different spots from where the spark plug wires route around the alt. and through the wire routing path.. Ill have to pull them and check em' but I feel pretty confident that will be my problem...?
Kris
01-24-2010, 10:27 PM
#14
I feel ya.. I just pulled my car into the garage and killed all the lights and started my car...
Saw Arching coming from cylinder 6 by spark plug, wrapped it with some heat wrap Ive got laying around and drove it. Better but still there, came back in garage and check for Arching again, now I see 2-3 different spots from where the spark plug wires route around the alt. and through the wire routing path.. Ill have to pull them and check em' but I feel pretty confident that will be my problem...?
Kris
Saw Arching coming from cylinder 6 by spark plug, wrapped it with some heat wrap Ive got laying around and drove it. Better but still there, came back in garage and check for Arching again, now I see 2-3 different spots from where the spark plug wires route around the alt. and through the wire routing path.. Ill have to pull them and check em' but I feel pretty confident that will be my problem...?
Kris
