When Down At Pettit We Narrowed My Problem Down To The Fuel Dumping At Mid-range Rpm's. Afterwards We Checked All Sensors And Everything That Has To Do With The Fuel System And Its Control System. Cam Even Took The Injectors Out And "benched" Them. He Said That They Appeared To Flow Fine. After Being There For A Week We Could Not Fine The Definitive Problem But Cam Suggested Gong Home And Replacing The Wiring Harness. So I Took The Car Home And Ordered A Harness And Installed It The Following Week. But The Harness Did Not Help Whatsoever, Not Disspointed Though Because I Know I Would Have Needed It Sometime. Next Cam Suggest To Replace The Injectors Starting With The Secondaries, So He Sent Me A Set Of Secondaries And I Ordered A Set Of Primaries. My Question Is To Everyone: Has Anyone Ever Had An Injector "bench" Out Fine But Still Be Problematic? I Had The Injectors Flowed And Matched Last Year When I Rebuilt The Motor And Replaced The Turbo's. But, I Have Heard Horror Stories About Injectors After They Have Been Flowed And Matched. Is It Possible To Have A Sticky Or Intermittently Problematic Injector That Tests Out Fine?

Thanks Jamie

 

Anyone Out There?

 

Check your fuel thermosensor it supposedly pressureises the FPR for warm starts so it might possibly be sending a signal at mid RPM's.

 

Been Done Months Ago... I Have Tested And/or Replace Any Sensor That Was Not In Perfect Working Order. I Also Have Ran The Car Around Town Using A Pfc, And A Wolf 3d Computer To Monitor The System While Driving. All Of The Sensors Appear To Operate Normally Under All Around Town Driving Conditions.....

 

Bump

 

anyone alse have any input i really want to get this car running right before winter...

 

can anyone please check into my history and give me some rec's?

 

dude seriously you need to install the fuel rail cam gave you and see. yes they were "flow tested" at cam's bt what if it was not done right or was incorrect. you keep saying i have checked and replaced everything so what else is there to do? random esoteric **** people throw out is prob not gonna help. the rail IS the next logical step.

 

Yup.. The only way to solve an injector prob. is to try some different ones. If you are really into the car why not go stand alone to monitor the cars output...

 

What ecu are u running?

 

If you are running the pettit unlimited foresay nothing can be diagnosed. It would seem weird to me Cam could not figure this out. It has to be a flow problem or computer adjustment.

 

WEIRD.... I just saw you ran a few different ecus..Did you get some "hard" data / them? Regular load..heavy load..etc etc.. It seems that you need to acquire some data to se what needs to be adjusted.. When I put my fuel system in ( to safely support 15 psi on the stock twins) ; I went to a stand alone. We dynod the car tuning a microtech lt8s. After the dyno; we drove her on the street to fine tune the fuel maps at normal loads. (Obviously on the dyno we were @ WOT w/ a wideband O2. Here and there we adjusted the fuel maps to make the car run smooth.
P. S. Before these upgrades I was running a pettit unlimited ecu @12 psi w/ all the bolt ons. You have to take into consideraton tha a rechipped ecu only is set for certain parameters. Hope this helps. Garret

 

I have the m2 in it right now, which I have pondered the thought of replacing it with a wolf 3d. The thing that bothers me is that before the last motor popped everything ran fine. When i replaced the motor I had Pineapple Racing build it with all new components, stage 2 oil mods, new housings, rotors, seals, and everything cryotreated. SO, basically just a great, reliable, rebuild. I replaced the clutch with one from RPS eng., ACT 9.5 lb flywheel, sent the injectors off to Marren fuel injection to be flowed and matched, added 20b fuel pump, new oil injectors and lines, magnecore 10mm wires and NGK plugs, new coil packs all the way around, and now have new wiring harness, batt. relocation, replaced all temperature sensors, Pettit intake setup, Pettit AST, and the turbos are 99 spec(new)....

I have wondered that maybe since I had new motor, 200 miles on 99 turbos, dp, cat, and eveything cleaned up that it was a problem with the tune. But I dont believe that to be it, also Cam says that the setup that I have should work fine with good stock injectors and the 20b pump...

When we dyno'd the vehicle with the Wolf 3d everything appeared fine, injector duty, fuel rate, boost , ignition etc... So after Cam had tested everything he knew to he got Steve Kahn, a gentelman from Mazdacomp on the phone, and had a local tuner friend stop by and could not figure it out. But while driving with the Wolf 3d in place around the street with the fuel pulled back the car was sooo fun to drive again. That is probably the only thing keeping me holding on. Im soo frustrated now, its been sooo much time and money and headache with this car and I just cant enjoy it. I have spent more almost troubleshooting it than replacing the motor and turbo's...

Thanks for any advice and wisdom...
Jamie

 

Any Ideas Out There...

 

not to be a dik but with all the time you have spent posting "what else could it be?" the new injectors could be almost totaly installed by now.... damn bring it down here and i will help you put it in

 

Been Down There To Cams Twice Waste Of Time...