Problem with Turbocharged MX3 (HELP!!!)
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Problem with Turbocharged MX3 (HELP!!!)
I am having some weird problems with my vehicle within the last couple of days, hopefully you folks can offer some input.
First of all when i start the car the idle is jumping up and down between 500-1500rpms, then sometimes it drops right down to 500 or so rpms and the car cuts out. This strange behaviour also happens in traffic sometimes, idle jumps up and down and vehicle dies and I have to restart.
The other problem I am having is the vehicle will sometime stumble or bucking sharply under acceleration, this happens for a short while then the vehicle accelarates as normal.
The only thing I have checked so far is spark plugs and wires and these are fine. I even switch to some other plugs and wires for a day or so and still am having the same problem. The connections for the intercooler seems to be okay as well.
The vehicle is a turbocharged 94 Mazda MX3 1.6 DOHC with TurboXS BOV, 1.8 Miata Injectors, Walbro 255 fuel pump, Cartech RRFPR and FMIC. The engine is completely stock using a GTX Manifold and VJ-11 turbo.
Please help. Any suggestions would be appreciated.
First of all when i start the car the idle is jumping up and down between 500-1500rpms, then sometimes it drops right down to 500 or so rpms and the car cuts out. This strange behaviour also happens in traffic sometimes, idle jumps up and down and vehicle dies and I have to restart.
The other problem I am having is the vehicle will sometime stumble or bucking sharply under acceleration, this happens for a short while then the vehicle accelarates as normal.
The only thing I have checked so far is spark plugs and wires and these are fine. I even switch to some other plugs and wires for a day or so and still am having the same problem. The connections for the intercooler seems to be okay as well.
The vehicle is a turbocharged 94 Mazda MX3 1.6 DOHC with TurboXS BOV, 1.8 Miata Injectors, Walbro 255 fuel pump, Cartech RRFPR and FMIC. The engine is completely stock using a GTX Manifold and VJ-11 turbo.
Please help. Any suggestions would be appreciated.
JSpec Turbo MX3 (1.6 DOHC)
http://www.cardomain.com/memberpage/310985
Port and Polished Head, Ported Intake Manifold, Valve Job, GTX Manifold, Hybrid Turbo, Cone Filter, 2.5" Exhaust, 2.5" Downpipe, ACT Street Clutch, Lightened Flywheel, MSD 6A Ignition, Boost Retard and SS Coil, Magnecor Plug Wires, Denso Iridium Plugs, UR Lightened Pulley, Spearco FMIC, Turbo XS BOV & MBC, BEGI RRFPR, Supra Injectors, Walbro 255 Fuel Pump, Autometer Gauges, Pivot Shift Light
http://www.cardomain.com/memberpage/310985
Port and Polished Head, Ported Intake Manifold, Valve Job, GTX Manifold, Hybrid Turbo, Cone Filter, 2.5" Exhaust, 2.5" Downpipe, ACT Street Clutch, Lightened Flywheel, MSD 6A Ignition, Boost Retard and SS Coil, Magnecor Plug Wires, Denso Iridium Plugs, UR Lightened Pulley, Spearco FMIC, Turbo XS BOV & MBC, BEGI RRFPR, Supra Injectors, Walbro 255 Fuel Pump, Autometer Gauges, Pivot Shift Light
- papa roached
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Re: Problem with Turbocharged MX3 (HELP!!!)
check to see if it has any CEL codes in it
93 MX-3 GS (collecting parts for Eunos Presso conversion), 94 626 Transmission (4.10 gears), KL31 camed KL-ZE, Millenia intake, Millenia TB, SSAutochrome V2 headers, Magnaflow cat, 2 1/4 in pipe, Top Speed Pro 1 muffler, 9lb Fidanza Flywheel, ACT clutch, Corksport SS clutch line, Corksport SS brake lines, Unorthadox UDP, 255 lph fuel pump, HEI mod, ghetto-charger intake, KL36 ECU, SRD transverse crossmember bushings, SRD shifter extention bushing, SRD crossmember, Corksport bronzoil shifter bushings, Brembo Crossdrilled and Slotted rotors, 15 inch Konig Heliums, ZX-2 S/R struts, Eibach lowering springs, OEM front strut bar, Ebay rear strut bar, BFGoodrich G-Force T/A KDWs
Parts needing installed: turbo kit from BB (if i ever get it), 9.0:1 CR Diamond pistons, 4340 forged H beam rods, C/J-Spec spoiler, Nissan red tops in KL rails
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Parts needing installed: turbo kit from BB (if i ever get it), 9.0:1 CR Diamond pistons, 4340 forged H beam rods, C/J-Spec spoiler, Nissan red tops in KL rails
http://www.cardomain.com/id/blazejeremy
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Re: Problem with Turbocharged MX3 (HELP!!!)
i'm thinking the TPS
- goldsberry1
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Re: Problem with Turbocharged MX3 (HELP!!!)
or perhaps it could be a vacum leak somewhere.
92' mx-3 gsr, built engine, forged internals, p/p ze heads. t3/t4e .63/.60 turbo, udp, msd ignition, millenia s injectors, millenia im, water cooled intercooler, afpr, fmu. running at 7 psi right now
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Re: Problem with Turbocharged MX3 (HELP!!!)
I second the leak idea, but I would target the piping and BOV connections.
Proud builder of
455 hp Miata 10.98@125mph
MX-3 RS 25 psi 451 hp
MX-6 F2T 12.8 @ 112 mph
(Current Project) A 700 hp MX-3 now at 475 hp
455 hp Miata 10.98@125mph
MX-3 RS 25 psi 451 hp
MX-6 F2T 12.8 @ 112 mph
(Current Project) A 700 hp MX-3 now at 475 hp
Re: Problem with Turbocharged MX3 (HELP!!!)
Thirding the vaccum leak idea, is your bov staying closed at idle?
92' Rs-t b6t/De - RIP
93' Rs-t BPT - Sold
03' WRB wrx Wagon - Current
93' Rs-t BPT - Sold
03' WRB wrx Wagon - Current
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Re: Problem with Turbocharged MX3 (HELP!!!)
Sounds to me like a simple fuel delivery problem
check filter and pump or clogged lines
check filter and pump or clogged lines
peace
- babyblueMX3
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Re: Problem with Turbocharged MX3 (HELP!!!)
got a fuel pressure gauge ?? what pressure you are running on idle and at full boost (btw what boost you're running?)..myabe your 2025 isn't rising the fuel properly..what you a/f ratio is?..maybe you need to play with the rising rate on your fmu..but that's only a guess since we don't know much about your car..this is for the bugging problem
as far as the rpm goes, I would think a bad tps or it isn't asjusted properly? vacuum leak is not a bad idea too
as far as the rpm goes, I would think a bad tps or it isn't asjusted properly? vacuum leak is not a bad idea too
RIP 400whp ZE-T MX-3
Current car : Golf 01 GTI 1.8T (15 psi)
Current car : Golf 01 GTI 1.8T (15 psi)
Re: Problem with Turbocharged MX3 (HELP!!!)
Accidental double post..
<small>[ October 21, 2004, 10:56 PM: Message edited by: mx3man83 ]</small>
<small>[ October 21, 2004, 10:56 PM: Message edited by: mx3man83 ]</small>
Combat kit, Spectra blue paint, shaved, Black ADR flite 4 17's/ Yokahama ES 100's, straight through 2.5 inch cat back exhaust, CAI, Straight neck IM KLZE, poly filled motor mounts, Kl48/ Eprom chip, black altezzas, Wet Zex 75 shot, Walbro 255 fuel pump, Cosmo AFPR, GS SE all black interior, RF 1kbd amp, RF 12 HE2's (2), US acoustics 4 channel amp
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Re: Problem with Turbocharged MX3 (HELP!!!)
I had a similar problem on my NA klze. Turns out it was the TPS and CTS. Not too familiar with the 4 cylinders, but its something to look into.
Combat kit, Spectra blue paint, shaved, Black ADR flite 4 17's/ Yokahama ES 100's, straight through 2.5 inch cat back exhaust, CAI, Straight neck IM KLZE, poly filled motor mounts, Kl48/ Eprom chip, black altezzas, Wet Zex 75 shot, Walbro 255 fuel pump, Cosmo AFPR, GS SE all black interior, RF 1kbd amp, RF 12 HE2's (2), US acoustics 4 channel amp
My Cardomain site
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