NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   2nd Generation Specific (https://www.nopistons.com/2nd-generation-specific-17/)
-   -   Having sputtering at 4000 to 5000 rpm (https://www.nopistons.com/2nd-generation-specific-17/having-sputtering-4000-5000-rpm-71706/)

XxHornLonxX 02-15-2009 05:16 PM

I have an 88 turbo ii 94700 original miles just drug it out and got it going but i am getting a sputtering in the 4 to 5k rpm range only when turbo spools. keep in mind im that technical so please help a helpless noob.



Think i shoul;d of mentioned that it has a three inch down flow with presilencer from racing beat and ractive cat exhaust. also full cut controller.

Fastenough 02-15-2009 06:03 PM

When you say just drug it out and got it going, how long has the car been sitting? General stuff like plug wires, igniters fuel filter etc, been replaced yet? Any or all can cause performace issues.

XxHornLonxX 02-18-2009 07:13 AM


Originally Posted by Fastenough' post='916710' date='Feb 15 2009, 07:03 PM
When you say just drug it out and got it going, how long has the car been sitting? General stuff like plug wires, igniters fuel filter etc, been replaced yet? Any or all can cause performace issues.



The car sat for 2 years. Changed plugs and wires. Before it was parked I had to replace the turbo, all stock. The new one came out of a 36k mile car.

fc3s4utnv 02-18-2009 06:55 PM

Dang I was going to say change the plugs..... everytime mine starts to do that its the plugs

RicerJ 02-18-2009 10:47 PM

cant hurt to check them make sure they are still good you never really know

FC_BOY 02-19-2009 12:18 AM

dude i have a S5 turbo and almost the same mods and i get that problem too.

ckyorkillyourself 02-19-2009 12:56 AM

i have a 88 rx n/a. that has a all around hesitation. its really slow to rev up. the exhaust manifold glows red

after driving it. it has a bit of torque but seem to be lacking horsepower. it starts up right away. runs fine but lacks horsepower. there isnt alot of exhaust coming out of the exhaust. so i was thinking clogged cats but not sure any other ideas please help.

XxHornLonxX 02-19-2009 07:51 AM

Now when I say sputter to me it feels similar to the fuel cut controller not being there. The car still goes when you punch it in that rpm ranges it just pops and spits and backfires. Also I drove thirty highway miles yesterday stopped at a store came back out and tried to start all it would do is spins over. So I hold the gas to the floor try again and after a sec or two it starts. Any suggestions?

fc3s4utnv 02-20-2009 11:39 AM

fuel injectors old and nasty?

XxHornLonxX 02-21-2009 08:48 AM


Originally Posted by fc3s4utnv' post='917101' date='Feb 20 2009, 12:39 PM
fuel injectors old and nasty?

Not sure? really dumb question for anyone, is my wastegate supposed to turn freely?

XxHornLonxX 02-22-2009 10:27 AM

I put a ground wire from the water pump housing to the chasis, didn't fully eliminate problem but now I can get it up to around 5500 rpms before popping and backfiring.

XxHornLonxX 02-24-2009 07:57 PM

Received a pair of secondary injectors today....0$

Shop to use to install them............................0$

If i were to video tape the project and sell it...Priceless. https://www.nopistons.com/forums/pub...#>/biggrin.gif



Will keep you updated on the project.

RicerJ 02-24-2009 09:20 PM

are you making fun of mastercard or was it really free?

XxHornLonxX 02-25-2009 08:25 PM


Originally Posted by RicerJ' post='917318' date='Feb 24 2009, 10:20 PM
are you making fun of mastercard or was it really free?



No when I say free I mean free.

Same guy is selling me a fender and door for $100.<----Damage from Ex-girlfriend.



Got the injectors in car runs great. Problems now are broken vac hose (simple enough) and the mystery "E Vap Hose" that was lying in wait as I pulled off the the throttle body.

RicerJ 02-26-2009 12:17 AM

damn lucky on that stuff but what kind of damage are you talking

XxHornLonxX 02-26-2009 09:29 AM


Originally Posted by RicerJ' post='917378' date='Feb 26 2009, 01:17 AM
damn lucky on that stuff but what kind of damage are you talking



She kicked in the window and bent the door backwards which rolled the lip of the fender, so when you open it now it flies open.

RicerJ 02-26-2009 02:34 PM

**** pissed off much


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