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#1
01-29-2008, 11:11 AM
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car hesitates when floored,but only at higher rpms
every time i floor it and the rpms reach at about 4500 rpms,the car hesitates and chugs.it just started like 3 friggin' days ago. any hints or fix's. my repair manual said it could be vacuum leakage,fouled plugs,clogged fuel filter or injectors.even a tech said leakage! ?????????????????????????
  opcorn:
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kosei black powdercoated 16'' rims,hyoshi muffler,removed smaller honeycomb in maf,ngk wires and plugs,luk clutch and pressure plate,stock flywheel,traction t/a bfgoodrich tires,silverstar ultra headlights 
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#2
01-29-2008, 11:14 AM
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Re: car hesitates when floored,but only at higher rpms
We cant help you unless we know what car you have.
If its turbo check for boost leaks. If its NA then do a tune up and see if problem is still there.
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98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#3
01-29-2008, 12:02 PM
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Re: car hesitates when floored,but only at higher rpms
Just do a tune up in general no matter what model.
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2013 Chevy Sonic 1LZ Daily Driver, 1.4L Turbo, 6spd 75 Monte Carlo SBC 400 6.6L, Aluminum heads, Hurricane Intake... 12 Chevy Sonic 1LZ 1.8L - Traded 01 Pontiac Grand Am SE - RIP 95 Eagle Talon ESi-T 5spd - RIP 88 Oldsmobile Cutlass Ciera- RIP
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#5
01-30-2008, 10:31 PM
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Re: car hesitates when floored,but only at higher rpms
no lights on , boosted , 92 talon tsi awd
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kosei black powdercoated 16'' rims,hyoshi muffler,removed smaller honeycomb in maf,ngk wires and plugs,luk clutch and pressure plate,stock flywheel,traction t/a bfgoodrich tires,silverstar ultra headlights
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#6
01-30-2008, 10:46 PM
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Re: car hesitates when floored,but only at higher rpms
Do a boost leak test and a tune up and see if the problem still exist.
__________________
98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#7
01-30-2008, 11:01 PM
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Re: car hesitates when floored,but only at higher rpms
how would my car react to a boost leak?
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kosei black powdercoated 16'' rims,hyoshi muffler,removed smaller honeycomb in maf,ngk wires and plugs,luk clutch and pressure plate,stock flywheel,traction t/a bfgoodrich tires,silverstar ultra headlights
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#8
01-30-2008, 11:03 PM
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Re: car hesitates when floored,but only at higher rpms
it would run rich and sputter when boost hits
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FP 18g turbo e3 o2 & mani, 3" exhaust, , 7 bolt, wiseco/eagle, walbro 255hp re-wired, Aeromotive FPR, FIC 1150cc, injen intake, greddy RS, aem wideband, turbo xs mbc, act 2600 clutch sprung 6 puck, BC 272's, dsmlink v2.5, ETS FMIC, Devils Own, JMF SMIM. 18 Inch chrome rims In closet AEM Fuel Rail, SS Lines, 1997 TSI AWD Diamonds Are 4Ever 12.7 @ 107 http://i83.photobucket.com/albums/j2...y/DSC00461.jpg
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#9
01-30-2008, 11:27 PM
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Re: car hesitates when floored,but only at higher rpms
i would do plugs and wires.
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-1997 Eclipse Spyder GST |Stock| -1990 Eclipse GSX |ACL Main & Rod Race Bearings|Balance Shafts Removed|ARP Head Studs|Cometic HG|FP 20g TDO6H|EPROM Chipped (stutter box 5k, fuel comp.)|PTE 680cc inj.|Walbro 255 HP Fuel Pump|Autoteq FPR|SAFC 2|FMIC|2g MAF|Dejon Tool Hard Pipe|Greddy Type S|MBC at 17PSI|Ported 2g Exhaust Manifold|02 Housing w/ Tial 38mm WG|Full 3inch Exhaust w/ Y-pipe Cutout|Fidanza Flywheel|ACT 2100|4 Bolt LSD Rear|Poly Mounts|KYB AGX Suspension|Roll Bar|
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#10
02-05-2008, 09:35 PM
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Re: car hesitates when floored,but only at higher rpms
I second the plugs and wires. I had a buddy with the same problem. We swapped his plugs and wires out and problem solved.
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1993 del sol s 1990 Eagle Talon Tsi Awd
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#11
02-05-2008, 10:26 PM
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Re: car hesitates when floored,but only at higher rpms
Mine has a heavy idle surge when at idle (duh!?) and it also hesitates like crazy at about 5k rpms also. I haven't done a boost leak test yet though, would that cause both of my problems? Also at idle I get a CEL until I just tap the gas and it goes away? I'm in the same boat as Jeremy.
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#12
02-05-2008, 10:33 PM
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Re: car hesitates when floored,but only at higher rpms
I would do a boost leak test first. That should fix most, if not all of your problems.
__________________
98 Eclipse GS Turbo Megasquirt 2 - Holset HY35 Turbo - Built motor - P&P Head and Intake - 3" Turbo back - FMIC - Greddy RZ BOV - Walbro 255 - Aeromotive AFPR - 650cc Injectors - Fidanza Flywheel - Zoom clutch - 13" Cobra Front Brakes - AEM WB - Devilsown meth injection - 3.55 Final Drive gear ratio 1981 Chevy Scottsdale 1987 Nissan 300zx - Chump Car 2001 BMW 325i - DD
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#13
02-07-2008, 11:02 PM
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Re: car hesitates when floored,but only at higher rpms
I've seen some pretty nice boost leak testers on eBay, how hard are they to make? The bonus of buying one of the ones in the link is that you will always have one that does the job.
http://cgi.ebay.com/ebaymotors/ws/eB...204235386&rd=1 Will it work on a small 16G? The description says stock turbo. Last edited by ned032002; 02-08-2008 at 07:56 AM.
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#14
02-08-2008, 11:25 PM
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Re: car hesitates when floored,but only at higher rpms
i have found the problem,indeed the plugs were bad so i replaced them both.the cylinder number 2 plug was burned until the bar on top dissolved,dont guess the person i bought it from took very good care of it,some times i feel like judo chopping him in the neck for being careless,but thank you for your help everybody
jeremy
__________________
kosei black powdercoated 16'' rims,hyoshi muffler,removed smaller honeycomb in maf,ngk wires and plugs,luk clutch and pressure plate,stock flywheel,traction t/a bfgoodrich tires,silverstar ultra headlights
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#15
02-17-2008, 12:07 AM
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Re: car hesitates when floored,but only at higher rpms
I've searched on how to do a boost leak test and I've found so many different do's and dont's threads that I don't know what to do. I bought the Tester in the link that you see above but I haven't used it yet. What do I need to do to test if I have a boost leak? I know I need to put the one end on the turbo and then pressurize the pipe up to 15 psi or so. Now what do I need to plug and what do I need to unhook to this test. If someone could tell me step by step what to do I can do it.
EDIT: Found VFAQ, I will try to do the test tonight and post my results. Last edited by ned032002; 02-17-2008 at 07:02 PM.
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