"bucking" at certain rpms....
Thread Starter
Newbie
Joined: Jun 2004
Posts: 50
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"bucking" at certain rpms....
hey guys... i just recently got my car flashed by shiv at the recent socal dyno day at tuning technologies.... i'm pleased with the car and my dyno, its just that at certain rpms, when i floor it, the car tends to "buck"/ stutter... it only does it for a second and pulls like normal after... and sometimes, it "bucks" more than once when i'm flooring it in a certain gear.... any suggestions? i was just thinking that it might be a dip in the fuel curve, so i was planning on injectors and afc tuning at tuning technologies.... any help and feedback would be appreciated....
heres my mods...
hks 264i/272e, cam gears (-2/-2), evc, ssq bov ver2, eids
arc intake box, fmic
fujitsubo super titanium exhaust
jspeed downpipe
helix testpipe
walbro pump
custom xflash
321 whp/ 320wtq on 91
heres my mods...
hks 264i/272e, cam gears (-2/-2), evc, ssq bov ver2, eids
arc intake box, fmic
fujitsubo super titanium exhaust
jspeed downpipe
helix testpipe
walbro pump
custom xflash
321 whp/ 320wtq on 91
Eddie,
Not sure what the problem is. Usually, I'd attribute bucking to blow off valves, but you say this is happening under load? Still, could be blow off valve, old spark plugs that are misfiring or good plugs that are gapped too wide. Generally, flashes are very reliable. Let's see what others have to say.
Smoggy
Not sure what the problem is. Usually, I'd attribute bucking to blow off valves, but you say this is happening under load? Still, could be blow off valve, old spark plugs that are misfiring or good plugs that are gapped too wide. Generally, flashes are very reliable. Let's see what others have to say.
Smoggy
You might have a leak some where possibly from a loose clamp and added pressure from the tune. Did you already check your inter cooler pipes and boost lines? Are you having any boost spikes? If it’s leaking air somewhere that can cause the symptoms you describe. Any body got any other ideas?
Thread Starter
Newbie
Joined: Jun 2004
Posts: 50
Likes: 0
yah magic i do regularly check loose clamps and what not for boost leaks... everything looks intact.... i'm not sure if its the plugs cuz i only have 7k miles on the car... but its worth a look... thanks for the feedback guys....
hey smoggie, hows the car running?
eddie...
hey smoggie, hows the car running?
eddie...
Is the EIDS the HKS SAFR unit? If it is, are the setting cleared out? Maybe unhook it and see if that may be the problem. Since this happens under load I don't think this is BOV related. Is it happening at one area of RPM? Like 3000-4000RPM where the boost is highest?
